yang/yang-model-export/src/main/java/org/opendaylight/yangtools/yang/model/export/SchemaContextEmitter.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.yangtools.yang.model.export;
   9
  10 import com.google.common.annotations.Beta;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.base.Predicates;
  13 import com.google.common.collect.Collections2;
  14 import com.google.common.collect.Range;
  15 import com.google.common.collect.RangeSet;
  16 import com.google.common.primitives.UnsignedInteger;
  17 import java.net.URI;
  18 import java.util.Collection;
  19 import java.util.Iterator;
  20 import java.util.List;
  21 import java.util.Map;
  22 import java.util.Map.Entry;
  23 import java.util.Objects;
  24 import java.util.Optional;
  25 import java.util.Set;
  26 import javax.annotation.Nonnull;
  27 import javax.annotation.Nullable;
  28 import javax.annotation.concurrent.NotThreadSafe;
  29 import org.opendaylight.yangtools.yang.common.QName;
  30 import org.opendaylight.yangtools.yang.common.Revision;
  31 import org.opendaylight.yangtools.yang.common.YangVersion;
  32 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
  33 import org.opendaylight.yangtools.yang.model.api.AnyDataSchemaNode;
  34 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
  35 import org.opendaylight.yangtools.yang.model.api.AugmentationSchemaNode;
  36 import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
  37 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
  38 import org.opendaylight.yangtools.yang.model.api.ConstraintDefinition;
  39 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
  40 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
  41 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
  42 import org.opendaylight.yangtools.yang.model.api.Deviation;
  43 import org.opendaylight.yangtools.yang.model.api.DocumentedNode;
  44 import org.opendaylight.yangtools.yang.model.api.ExtensionDefinition;
  45 import org.opendaylight.yangtools.yang.model.api.FeatureDefinition;
  46 import org.opendaylight.yangtools.yang.model.api.GroupingDefinition;
  47 import org.opendaylight.yangtools.yang.model.api.IdentitySchemaNode;
  48 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
  49 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
  50 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
  51 import org.opendaylight.yangtools.yang.model.api.Module;
  52 import org.opendaylight.yangtools.yang.model.api.ModuleImport;
  53 import org.opendaylight.yangtools.yang.model.api.MustDefinition;
  54 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  55 import org.opendaylight.yangtools.yang.model.api.OperationDefinition;
  56 import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
  57 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
  58 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  59 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  60 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  61 import org.opendaylight.yangtools.yang.model.api.Status;
  62 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  63 import org.opendaylight.yangtools.yang.model.api.UniqueConstraint;
  64 import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
  65 import org.opendaylight.yangtools.yang.model.api.UsesNode;
  66 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  67 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  68 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
  69 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
  70 import org.opendaylight.yangtools.yang.model.api.stmt.ActionStatement;
  71 import org.opendaylight.yangtools.yang.model.api.stmt.AnydataStatement;
  72 import org.opendaylight.yangtools.yang.model.api.stmt.AnyxmlStatement;
  73 import org.opendaylight.yangtools.yang.model.api.stmt.ArgumentStatement;
  74 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
  75 import org.opendaylight.yangtools.yang.model.api.stmt.BaseStatement;
  76 import org.opendaylight.yangtools.yang.model.api.stmt.BelongsToStatement;
  77 import org.opendaylight.yangtools.yang.model.api.stmt.BitStatement;
  78 import org.opendaylight.yangtools.yang.model.api.stmt.BodyGroup;
  79 import org.opendaylight.yangtools.yang.model.api.stmt.CaseStatement;
  80 import org.opendaylight.yangtools.yang.model.api.stmt.ChoiceStatement;
  81 import org.opendaylight.yangtools.yang.model.api.stmt.ConfigStatement;
  82 import org.opendaylight.yangtools.yang.model.api.stmt.ContactStatement;
  83 import org.opendaylight.yangtools.yang.model.api.stmt.ContainerStatement;
  84 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionContainer;
  85 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionStatement;
  86 import org.opendaylight.yangtools.yang.model.api.stmt.DefaultStatement;
  87 import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionStatement;
  88 import org.opendaylight.yangtools.yang.model.api.stmt.DeviateStatement;
  89 import org.opendaylight.yangtools.yang.model.api.stmt.DeviationStatement;
  90 import org.opendaylight.yangtools.yang.model.api.stmt.DocumentationGroup;
  91 import org.opendaylight.yangtools.yang.model.api.stmt.DocumentedConstraintGroup;
  92 import org.opendaylight.yangtools.yang.model.api.stmt.EnumStatement;
  93 import org.opendaylight.yangtools.yang.model.api.stmt.ErrorAppTagStatement;
  94 import org.opendaylight.yangtools.yang.model.api.stmt.ErrorMessageStatement;
  95 import org.opendaylight.yangtools.yang.model.api.stmt.FeatureStatement;
  96 import org.opendaylight.yangtools.yang.model.api.stmt.FractionDigitsStatement;
  97 import org.opendaylight.yangtools.yang.model.api.stmt.GroupingStatement;
  98 import org.opendaylight.yangtools.yang.model.api.stmt.IdentityStatement;
  99 import org.opendaylight.yangtools.yang.model.api.stmt.IfFeatureStatement;
 100 import org.opendaylight.yangtools.yang.model.api.stmt.ImportStatement;
 101 import org.opendaylight.yangtools.yang.model.api.stmt.IncludeStatement;
 102 import org.opendaylight.yangtools.yang.model.api.stmt.InputStatement;
 103 import org.opendaylight.yangtools.yang.model.api.stmt.KeyStatement;
 104 import org.opendaylight.yangtools.yang.model.api.stmt.LeafListStatement;
 105 import org.opendaylight.yangtools.yang.model.api.stmt.LeafStatement;
 106 import org.opendaylight.yangtools.yang.model.api.stmt.LengthStatement;
 107 import org.opendaylight.yangtools.yang.model.api.stmt.LinkageGroup;
 108 import org.opendaylight.yangtools.yang.model.api.stmt.ListStatement;
 109 import org.opendaylight.yangtools.yang.model.api.stmt.MandatoryStatement;
 110 import org.opendaylight.yangtools.yang.model.api.stmt.MaxElementsStatement;
 111 import org.opendaylight.yangtools.yang.model.api.stmt.MetaGroup;
 112 import org.opendaylight.yangtools.yang.model.api.stmt.MinElementsStatement;
 113 import org.opendaylight.yangtools.yang.model.api.stmt.ModifierStatement;
 114 import org.opendaylight.yangtools.yang.model.api.stmt.ModuleStatement;
 115 import org.opendaylight.yangtools.yang.model.api.stmt.MustStatement;
 116 import org.opendaylight.yangtools.yang.model.api.stmt.NamespaceStatement;
 117 import org.opendaylight.yangtools.yang.model.api.stmt.NotificationStatement;
 118 import org.opendaylight.yangtools.yang.model.api.stmt.OperationGroup;
 119 import org.opendaylight.yangtools.yang.model.api.stmt.OrderedByStatement;
 120 import org.opendaylight.yangtools.yang.model.api.stmt.OrganizationStatement;
 121 import org.opendaylight.yangtools.yang.model.api.stmt.OutputStatement;
 122 import org.opendaylight.yangtools.yang.model.api.stmt.PathStatement;
 123 import org.opendaylight.yangtools.yang.model.api.stmt.PatternStatement;
 124 import org.opendaylight.yangtools.yang.model.api.stmt.PositionStatement;
 125 import org.opendaylight.yangtools.yang.model.api.stmt.PrefixStatement;
 126 import org.opendaylight.yangtools.yang.model.api.stmt.PresenceStatement;
 127 import org.opendaylight.yangtools.yang.model.api.stmt.RangeStatement;
 128 import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceStatement;
 129 import org.opendaylight.yangtools.yang.model.api.stmt.RefineStatement;
 130 import org.opendaylight.yangtools.yang.model.api.stmt.RequireInstanceStatement;
 131 import org.opendaylight.yangtools.yang.model.api.stmt.RevisionDateStatement;
 132 import org.opendaylight.yangtools.yang.model.api.stmt.RevisionGroup;
 133 import org.opendaylight.yangtools.yang.model.api.stmt.RevisionStatement;
 134 import org.opendaylight.yangtools.yang.model.api.stmt.RpcStatement;
 135 import org.opendaylight.yangtools.yang.model.api.stmt.StatusStatement;
 136 import org.opendaylight.yangtools.yang.model.api.stmt.SubmoduleStatement;
 137 import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement;
 138 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefStatement;
 139 import org.opendaylight.yangtools.yang.model.api.stmt.UniqueStatement;
 140 import org.opendaylight.yangtools.yang.model.api.stmt.UnitsStatement;
 141 import org.opendaylight.yangtools.yang.model.api.stmt.UnknownStatement;
 142 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
 143 import org.opendaylight.yangtools.yang.model.api.stmt.ValueStatement;
 144 import org.opendaylight.yangtools.yang.model.api.stmt.WhenStatement;
 145 import org.opendaylight.yangtools.yang.model.api.stmt.YangVersionStatement;
 146 import org.opendaylight.yangtools.yang.model.api.stmt.YinElementStatement;
 147 import org.opendaylight.yangtools.yang.model.api.type.BinaryTypeDefinition;
 148 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition;
 149 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition.Bit;
 150 import org.opendaylight.yangtools.yang.model.api.type.BooleanTypeDefinition;
 151 import org.opendaylight.yangtools.yang.model.api.type.DecimalTypeDefinition;
 152 import org.opendaylight.yangtools.yang.model.api.type.EmptyTypeDefinition;
 153 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition;
 154 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition.EnumPair;
 155 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
 156 import org.opendaylight.yangtools.yang.model.api.type.InstanceIdentifierTypeDefinition;
 157 import org.opendaylight.yangtools.yang.model.api.type.IntegerTypeDefinition;
 158 import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
 159 import org.opendaylight.yangtools.yang.model.api.type.LengthConstraint;
 160 import org.opendaylight.yangtools.yang.model.api.type.ModifierKind;
 161 import org.opendaylight.yangtools.yang.model.api.type.PatternConstraint;
 162 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
 163 import org.opendaylight.yangtools.yang.model.api.type.StringTypeDefinition;
 164 import org.opendaylight.yangtools.yang.model.api.type.UnionTypeDefinition;
 165 import org.opendaylight.yangtools.yang.model.api.type.UnsignedIntegerTypeDefinition;
 166 import org.opendaylight.yangtools.yang.model.util.SchemaNodeUtils;
 167
 168 @Beta
 169 @NotThreadSafe
 170 abstract class SchemaContextEmitter {
 171
 172     final YangModuleWriter writer;
 173     final boolean emitInstantiated;
 174     final boolean emitUses;
 175     final Map<QName, StatementDefinition> extensions;
 176     final YangVersion yangVersion;
 177
 178     SchemaContextEmitter(final YangModuleWriter writer, final Map<QName, StatementDefinition> extensions,
 179             final YangVersion yangVersion) {
 180         this(writer, extensions, yangVersion, false, true);
 181     }
 182
 183     SchemaContextEmitter(final YangModuleWriter writer, final Map<QName, StatementDefinition> extensions,
 184             final YangVersion yangVersion, final boolean emitInstantiated, final boolean emitUses) {
 185         this.writer = Preconditions.checkNotNull(writer);
 186         this.emitInstantiated = emitInstantiated;
 187         this.emitUses = emitUses;
 188         this.extensions = Preconditions.checkNotNull(extensions);
 189         this.yangVersion = yangVersion;
 190     }
 191
 192     static void writeToStatementWriter(final Module module, final SchemaContext ctx,
 193             final StatementTextWriter statementWriter, final boolean emitInstantiated) {
 194         final YangModuleWriter yangSchemaWriter = SchemaToStatementWriterAdaptor.from(statementWriter);
 195         final Map<QName, StatementDefinition> extensions = ExtensionStatement.mapFrom(ctx.getExtensions());
 196         if (module instanceof EffectiveStatement && !emitInstantiated) {
 197             /*
 198              * if module is an effective statement and we don't want to export
 199              * instantiated statements (e.g. statements added by uses or
 200              * augment) we can get declared form i.e. ModuleStatement and then
 201              * use DeclaredSchemaContextEmitter
 202              */
 203             new DeclaredSchemaContextEmitter(yangSchemaWriter, extensions, module.getYangVersion())
 204             .emitModule(((EffectiveStatement<?, ?>) module).getDeclared());
 205         } else {
 206             /*
 207              * if we don't have access to declared form of supplied module or we
 208              * want to emit also instantiated statements (e.g. statements added
 209              * by uses or augment), we use EffectiveSchemaContextEmitter.
 210              */
 211             new EffectiveSchemaContextEmitter(yangSchemaWriter, extensions, module.getYangVersion(), emitInstantiated)
 212             .emitModule(module);
 213         }
 214     }
 215
 216     // FIXME: Probably should be moved to utils bundle.
 217     static <T> boolean isPrefix(final Iterable<T> prefix, final Iterable<T> other) {
 218         final Iterator<T> prefixIt = prefix.iterator();
 219         final Iterator<T> otherIt = other.iterator();
 220         while (prefixIt.hasNext()) {
 221             if (!otherIt.hasNext()) {
 222                 return false;
 223             }
 224             if (!Objects.deepEquals(prefixIt.next(), otherIt.next())) {
 225                 return false;
 226             }
 227         }
 228         return true;
 229     }
 230
 231     static class DeclaredSchemaContextEmitter extends SchemaContextEmitter {
 232
 233         DeclaredSchemaContextEmitter(final YangModuleWriter writer, final Map<QName, StatementDefinition> extensions,
 234                 final YangVersion yangVersion) {
 235             super(writer, extensions, yangVersion);
 236         }
 237
 238         void emitModule(final DeclaredStatement<?> declaredRootStmt) {
 239             if (declaredRootStmt instanceof ModuleStatement) {
 240                 emitModule((ModuleStatement) declaredRootStmt);
 241             } else if (declaredRootStmt instanceof SubmoduleStatement) {
 242                 emitSubmodule((SubmoduleStatement) declaredRootStmt);
 243             } else {
 244                 throw new UnsupportedOperationException(
 245                         String.format("Yin export: unsupported declared statement %s", declaredRootStmt));
 246             }
 247         }
 248
 249         private void emitModule(final ModuleStatement module) {
 250             super.writer.startModuleNode(module.rawArgument());
 251             emitModuleHeader(module);
 252             emitLinkageNodes(module);
 253             emitMetaNodes(module);
 254             emitRevisionNodes(module);
 255             emitBodyNodes(module);
 256             emitUnknownStatementNodes(module);
 257             super.writer.endNode();
 258         }
 259
 260         private void emitModuleHeader(final ModuleStatement input) {
 261             emitYangVersionNode(input.getYangVersion());
 262             emitNamespace(input.getNamespace());
 263             emitPrefixNode(input.getPrefix());
 264         }
 265
 266         private void emitSubmodule(final SubmoduleStatement submodule) {
 267             super.writer.startSubmoduleNode(submodule.rawArgument());
 268             emitSubmoduleHeaderNodes(submodule);
 269             emitLinkageNodes(submodule);
 270             emitMetaNodes(submodule);
 271             emitRevisionNodes(submodule);
 272             emitBodyNodes(submodule);
 273             emitUnknownStatementNodes(submodule);
 274             super.writer.endNode();
 275         }
 276
 277         private void emitSubmoduleHeaderNodes(final SubmoduleStatement input) {
 278             emitYangVersionNode(input.getYangVersion());
 279             emitBelongsTo(input.getBelongsTo());
 280         }
 281
 282         private void emitBelongsTo(final BelongsToStatement belongsTo) {
 283             super.writer.startBelongsToNode(belongsTo.rawArgument());
 284             emitPrefixNode(belongsTo.getPrefix());
 285             super.writer.endNode();
 286         }
 287
 288         private void emitMetaNodes(final MetaGroup input) {
 289             emitOrganizationNode(input.getOrganization());
 290             emitContact(input.getContact());
 291             emitDescriptionNode(input.getDescription());
 292             emitReferenceNode(input.getReference());
 293         }
 294
 295         private void emitLinkageNodes(final LinkageGroup input) {
 296             for (final ImportStatement importNode : input.getImports()) {
 297                 emitImport(importNode);
 298             }
 299             for (final IncludeStatement importNode : input.getIncludes()) {
 300                 emitInclude(importNode);
 301             }
 302         }
 303
 304         private void emitRevisionNodes(final RevisionGroup input) {
 305             emitRevisions(input.getRevisions());
 306         }
 307
 308         private void emitBodyNodes(final BodyGroup input) {
 309
 310             for (final org.opendaylight.yangtools.yang.model.api.stmt.ExtensionStatement extension : input
 311                     .getExtensions()) {
 312                 emitExtension(extension);
 313             }
 314             for (final FeatureStatement definition : input.getFeatures()) {
 315                 emitFeature(definition);
 316             }
 317             for (final IdentityStatement identity : input.getIdentities()) {
 318                 emitIdentity(identity);
 319             }
 320             for (final DeviationStatement deviation : input.getDeviations()) {
 321                 emitDeviation(deviation);
 322             }
 323
 324             emitDataNodeContainer(input);
 325
 326             for (final AugmentStatement augmentation : input.getAugments()) {
 327                 emitAugment(augmentation);
 328             }
 329             for (final RpcStatement rpc : input.getRpcs()) {
 330                 emitRpc(rpc);
 331             }
 332
 333             emitNotifications(input.getNotifications());
 334         }
 335
 336         private void emitDataNodeContainer(final DataDefinitionContainer input) {
 337             for (final DataDefinitionStatement child : input.getDataDefinitions()) {
 338                 emitDataSchemaNode(child);
 339             }
 340         }
 341
 342         private void emitDataNodeContainer(final DataDefinitionContainer.WithReusableDefinitions input) {
 343             for (final TypedefStatement typedef : input.getTypedefs()) {
 344                 emitTypedefNode(typedef);
 345             }
 346             for (final GroupingStatement grouping : input.getGroupings()) {
 347                 emitGrouping(grouping);
 348             }
 349             for (final DataDefinitionStatement child : input.getDataDefinitions()) {
 350                 emitDataSchemaNode(child);
 351             }
 352         }
 353
 354         private void emitDataSchemaNode(final DataDefinitionStatement child) {
 355             if (child instanceof ContainerStatement) {
 356                 emitContainer((ContainerStatement) child);
 357             } else if (child instanceof LeafStatement) {
 358                 emitLeaf((LeafStatement) child);
 359             } else if (child instanceof LeafListStatement) {
 360                 emitLeafList((LeafListStatement) child);
 361             } else if (child instanceof ListStatement) {
 362                 emitList((ListStatement) child);
 363             } else if (child instanceof ChoiceStatement) {
 364                 emitChoice((ChoiceStatement) child);
 365             } else if (child instanceof AnyxmlStatement) {
 366                 emitAnyxml((AnyxmlStatement) child);
 367             } else if (child instanceof AnydataStatement) {
 368                 emitAnydata((AnydataStatement) child);
 369             } else if (child instanceof UsesStatement) {
 370                 emitUsesNode((UsesStatement) child);
 371             } else {
 372                 throw new UnsupportedOperationException("Not supported DataStatement type " + child.getClass());
 373             }
 374         }
 375
 376         private void emitYangVersionNode(@Nullable final YangVersionStatement yangVersionStatement) {
 377             if (yangVersionStatement != null) {
 378                 super.writer.startYangVersionNode(yangVersionStatement.rawArgument());
 379                 super.writer.endNode();
 380             }
 381         }
 382
 383         private void emitImport(final ImportStatement importNode) {
 384             super.writer.startImportNode(importNode.rawArgument());
 385             emitDocumentedNode(importNode);
 386             emitPrefixNode(importNode.getPrefix());
 387             emitRevisionDateNode(importNode.getRevisionDate());
 388             super.writer.endNode();
 389         }
 390
 391         private void emitInclude(final IncludeStatement include) {
 392             super.writer.startIncludeNode(include.rawArgument());
 393             emitDocumentedNode(include);
 394             emitRevisionDateNode(include.getRevisionDate());
 395             super.writer.endNode();
 396         }
 397
 398         private void emitNamespace(final NamespaceStatement namespaceStatement) {
 399             Preconditions.checkNotNull(namespaceStatement, "Namespace must not be null");
 400             super.writer.startNamespaceNode(namespaceStatement.getUri());
 401             super.writer.endNode();
 402         }
 403
 404         private void emitPrefixNode(final PrefixStatement prefixStatement) {
 405             Preconditions.checkNotNull(prefixStatement, "Prefix must not be null");
 406             super.writer.startPrefixNode(prefixStatement.rawArgument());
 407             super.writer.endNode();
 408         }
 409
 410         private void emitOrganizationNode(@Nullable final OrganizationStatement organizationStatement) {
 411             if (organizationStatement != null) {
 412                 super.writer.startOrganizationNode(organizationStatement.rawArgument());
 413                 super.writer.endNode();
 414             }
 415         }
 416
 417         private void emitContact(@Nullable final ContactStatement contactStatement) {
 418             if (contactStatement != null) {
 419                 super.writer.startContactNode(contactStatement.rawArgument());
 420                 super.writer.endNode();
 421             }
 422         }
 423
 424         private void emitDescriptionNode(@Nullable final DescriptionStatement descriptionStatement) {
 425             if (descriptionStatement != null) {
 426                 super.writer.startDescriptionNode(descriptionStatement.rawArgument());
 427                 super.writer.endNode();
 428             }
 429         }
 430
 431         private void emitReferenceNode(@Nullable final ReferenceStatement referenceStatement) {
 432             if (referenceStatement != null) {
 433                 super.writer.startReferenceNode(referenceStatement.rawArgument());
 434                 super.writer.endNode();
 435             }
 436         }
 437
 438         private void emitUnitsNode(@Nullable final UnitsStatement unitsStatement) {
 439             if (unitsStatement != null) {
 440                 super.writer.startUnitsNode(unitsStatement.rawArgument());
 441                 super.writer.endNode();
 442             }
 443         }
 444
 445         private void emitRevisions(final Collection<? extends RevisionStatement> revisions) {
 446             for (final RevisionStatement revisionStatement : revisions) {
 447                 emitRevision(revisionStatement);
 448             }
 449         }
 450
 451         private void emitRevision(final RevisionStatement revision) {
 452             super.writer.startRevisionNode(revision.rawArgument());
 453             emitDocumentedNode(revision);
 454             super.writer.endNode();
 455         }
 456
 457         private void emitRevisionDateNode(@Nullable final RevisionDateStatement revisionDateStatement) {
 458             if (revisionDateStatement != null) {
 459                 super.writer.startRevisionDateNode(revisionDateStatement.rawArgument());
 460                 super.writer.endNode();
 461             }
 462         }
 463
 464         private void emitExtension(final org.opendaylight.yangtools.yang.model.api.stmt.ExtensionStatement extension) {
 465             super.writer.startExtensionNode(extension.rawArgument());
 466             emitArgument(extension.getArgument());
 467             emitDocumentedNodeWithStatus(extension);
 468             emitUnknownStatementNodes(extension);
 469             super.writer.endNode();
 470         }
 471
 472         private void emitArgument(@Nullable final ArgumentStatement input) {
 473             if (input != null) {
 474                 super.writer.startArgumentNode(input.rawArgument());
 475                 emitYinElement(input.getYinElement());
 476                 super.writer.endNode();
 477             }
 478         }
 479
 480         private void emitYinElement(@Nullable final YinElementStatement yinElementStatement) {
 481             if (yinElementStatement != null) {
 482                 super.writer.startYinElementNode(yinElementStatement.rawArgument());
 483                 super.writer.endNode();
 484             }
 485         }
 486
 487         private void emitIdentity(final IdentityStatement identity) {
 488             super.writer.startIdentityNode(identity.rawArgument());
 489             emitBaseIdentities(identity.getBases());
 490             emitStatusNode(identity.getStatus());
 491             emitDescriptionNode(identity.getDescription());
 492             emitReferenceNode(identity.getReference());
 493             super.writer.endNode();
 494         }
 495
 496         private void emitBaseIdentities(final Collection<? extends BaseStatement> collection) {
 497             for (final BaseStatement baseStmt : collection) {
 498                 emitBase(baseStmt);
 499             }
 500         }
 501
 502         private void emitBase(final BaseStatement baseStmt) {
 503             super.writer.startBaseNode(baseStmt.rawArgument());
 504             super.writer.endNode();
 505         }
 506
 507         private void emitFeature(final FeatureStatement feature) {
 508             super.writer.startFeatureNode(feature.rawArgument());
 509             emitIfFeatures(feature.getIfFeatures());
 510             emitDocumentedNodeWithStatus(feature);
 511             super.writer.endNode();
 512         }
 513
 514         private void emitIfFeatures(final Collection<? extends IfFeatureStatement> ifFeatures) {
 515             for (final IfFeatureStatement ifFeatureStatement : ifFeatures) {
 516                 emitIfFeature(ifFeatureStatement);
 517             }
 518         }
 519
 520         private void emitIfFeature(final IfFeatureStatement ifFeature) {
 521             super.writer.startIfFeatureNode(ifFeature.rawArgument());
 522             super.writer.endNode();
 523         }
 524
 525         private void emitTypedefNode(final TypedefStatement typedef) {
 526             super.writer.startTypedefNode(typedef.rawArgument());
 527             emitType(typedef.getType());
 528             emitUnitsNode(typedef.getUnits());
 529             emitDefaultNode(typedef.getDefault());
 530             emitStatusNode(typedef.getStatus());
 531             emitDescriptionNode(typedef.getDescription());
 532             emitReferenceNode(typedef.getReference());
 533             emitUnknownStatementNodes(typedef);
 534             super.writer.endNode();
 535         }
 536
 537         private void emitType(final TypeStatement typeStatement) {
 538             super.writer.startTypeNode(typeStatement.rawArgument());
 539             for (final DeclaredStatement<?> typeSubstmt : typeStatement.declaredSubstatements()) {
 540                 if (typeSubstmt instanceof RangeStatement) {
 541                     emitRange((RangeStatement) typeSubstmt);
 542                 } else if (typeSubstmt instanceof LengthStatement) {
 543                     emitLength((LengthStatement) typeSubstmt);
 544                 } else if (typeSubstmt instanceof PatternStatement) {
 545                     emitPattern((PatternStatement) typeSubstmt);
 546                 } else if (typeSubstmt instanceof FractionDigitsStatement) {
 547                     emitFractionDigits((FractionDigitsStatement) typeSubstmt);
 548                 } else if (typeSubstmt instanceof EnumStatement) {
 549                     emitEnum((EnumStatement) typeSubstmt);
 550                 } else if (typeSubstmt instanceof PathStatement) {
 551                     emitPath((PathStatement) typeSubstmt);
 552                 } else if (typeSubstmt instanceof RequireInstanceStatement) {
 553                     emitRequireInstance((RequireInstanceStatement) typeSubstmt);
 554                 } else if (typeSubstmt instanceof BaseStatement) {
 555                     emitBase((BaseStatement) typeSubstmt);
 556                 } else if (typeSubstmt instanceof BitStatement) {
 557                     emitBit((BitStatement) typeSubstmt);
 558                 } else if (typeSubstmt instanceof TypeStatement) {
 559                     emitType((TypeStatement) typeSubstmt);
 560                 }
 561             }
 562             super.writer.endNode();
 563         }
 564
 565         private void emitRange(final RangeStatement range) {
 566             super.writer.startRangeNode(range.rawArgument());
 567             emitDocumentedConstraint(range);
 568             super.writer.endNode();
 569         }
 570
 571         private void emitFractionDigits(final FractionDigitsStatement fractionDigits) {
 572             super.writer.startFractionDigitsNode(fractionDigits.rawArgument());
 573             super.writer.endNode();
 574         }
 575
 576         private void emitLength(final LengthStatement lengthStatement) {
 577             super.writer.startLengthNode(lengthStatement.rawArgument());
 578             emitDocumentedConstraint(lengthStatement);
 579             super.writer.endNode();
 580         }
 581
 582         private void emitPattern(final PatternStatement pattern) {
 583             super.writer.startPatternNode(pattern.rawArgument());
 584             emitModifier(pattern.getModifierStatement());
 585             emitDocumentedConstraint(pattern);
 586             super.writer.endNode();
 587         }
 588
 589         private void emitModifier(final ModifierStatement modifierStatement) {
 590             if (modifierStatement != null) {
 591                 super.writer.startModifierNode(modifierStatement.rawArgument());
 592                 super.writer.endNode();
 593             }
 594         }
 595
 596         private void emitDefaultNodes(final Collection<? extends DefaultStatement> collection) {
 597             for (final DefaultStatement defaultValue : collection) {
 598                 emitDefaultNode(defaultValue);
 599             }
 600         }
 601
 602         private void emitDefaultNode(@Nullable final DefaultStatement defaultStmt) {
 603             if (defaultStmt != null) {
 604                 super.writer.startDefaultNode(defaultStmt.rawArgument());
 605                 super.writer.endNode();
 606             }
 607         }
 608
 609         private void emitEnum(final EnumStatement enumStmt) {
 610             super.writer.startEnumNode(enumStmt.rawArgument());
 611             emitDocumentedNodeWithStatus(enumStmt);
 612             emitValueNode(enumStmt.getValue());
 613             super.writer.endNode();
 614         }
 615
 616         private void emitPath(final PathStatement path) {
 617             super.writer.startPathNode(path.rawArgument());
 618             super.writer.endNode();
 619         }
 620
 621         private void emitRequireInstance(final RequireInstanceStatement require) {
 622             super.writer.startRequireInstanceNode(require.rawArgument());
 623             super.writer.endNode();
 624         }
 625
 626         private void emitBit(final BitStatement bit) {
 627             super.writer.startBitNode(bit.rawArgument());
 628             emitPositionNode(bit.getPosition());
 629             emitDocumentedNodeWithStatus(bit);
 630             super.writer.endNode();
 631         }
 632
 633         private void emitPositionNode(@Nullable final PositionStatement positionStatement) {
 634             if (positionStatement != null) {
 635                 super.writer.startPositionNode(positionStatement.rawArgument());
 636                 super.writer.endNode();
 637             }
 638         }
 639
 640         private void emitStatusNode(@Nullable final StatusStatement statusStatement) {
 641             if (statusStatement != null) {
 642                 super.writer.startStatusNode(statusStatement.rawArgument());
 643                 super.writer.endNode();
 644             }
 645         }
 646
 647         private void emitConfigNode(@Nullable final ConfigStatement configStatement) {
 648             if (configStatement != null) {
 649                 super.writer.startConfigNode(configStatement.rawArgument());
 650                 super.writer.endNode();
 651             }
 652         }
 653
 654         private void emitMandatoryNode(@Nullable final MandatoryStatement mandatoryStatement) {
 655             if (mandatoryStatement != null) {
 656                 super.writer.startMandatoryNode(mandatoryStatement.rawArgument());
 657                 super.writer.endNode();
 658             }
 659         }
 660
 661         private void emitPresenceNode(@Nullable final PresenceStatement presenceStatement) {
 662             if (presenceStatement != null) {
 663                 super.writer.startPresenceNode(presenceStatement.rawArgument());
 664                 super.writer.endNode();
 665             }
 666         }
 667
 668         private void emitOrderedBy(@Nullable final OrderedByStatement orderedByStatement) {
 669             if (orderedByStatement != null) {
 670                 super.writer.startOrderedByNode(orderedByStatement.rawArgument());
 671                 super.writer.endNode();
 672             }
 673         }
 674
 675         private void emitMust(@Nullable final MustStatement must) {
 676             if (must != null) {
 677                 super.writer.startMustNode(must.rawArgument());
 678                 emitErrorMessageNode(must.getErrorMessageStatement());
 679                 emitErrorAppTagNode(must.getErrorAppTagStatement());
 680                 emitDescriptionNode(must.getDescription());
 681                 emitReferenceNode(must.getReference());
 682                 super.writer.endNode();
 683             }
 684         }
 685
 686         private void emitErrorMessageNode(@Nullable final ErrorMessageStatement errorMessageStatement) {
 687             if (errorMessageStatement != null) {
 688                 super.writer.startErrorMessageNode(errorMessageStatement.rawArgument());
 689                 super.writer.endNode();
 690             }
 691         }
 692
 693         private void emitErrorAppTagNode(@Nullable final ErrorAppTagStatement errorAppTagStatement) {
 694             if (errorAppTagStatement != null) {
 695                 super.writer.startErrorAppTagNode(errorAppTagStatement.rawArgument());
 696                 super.writer.endNode();
 697             }
 698         }
 699
 700         private void emitMinElementsNode(@Nullable final MinElementsStatement minElementsStatement) {
 701             if (minElementsStatement != null) {
 702                 super.writer.startMinElementsNode(minElementsStatement.rawArgument());
 703                 super.writer.endNode();
 704             }
 705         }
 706
 707         private void emitMaxElementsNode(@Nullable final MaxElementsStatement maxElementsStatement) {
 708             if (maxElementsStatement != null) {
 709                 super.writer.startMaxElementsNode(maxElementsStatement.rawArgument());
 710                 super.writer.endNode();
 711             }
 712         }
 713
 714         private void emitValueNode(@Nullable final ValueStatement valueStatement) {
 715             if (valueStatement != null) {
 716                 super.writer.startValueNode(valueStatement.rawArgument());
 717                 super.writer.endNode();
 718             }
 719         }
 720
 721         private void emitDocumentedNodeWithStatus(final DocumentationGroup.WithStatus input) {
 722             emitStatusNode(input.getStatus());
 723             emitDocumentedNode(input);
 724         }
 725
 726         private void emitDocumentedNode(final DocumentationGroup input) {
 727             emitDescriptionNode(input.getDescription());
 728             emitReferenceNode(input.getReference());
 729         }
 730
 731         private void emitDocumentedConstraint(final DocumentedConstraintGroup input) {
 732             emitDescriptionNode(input.getDescription());
 733             emitReferenceNode(input.getReference());
 734             emitErrorMessageNode(input.getErrorMessageStatement());
 735             emitErrorAppTagNode(input.getErrorAppTagStatement());
 736         }
 737
 738         private void emitGrouping(final GroupingStatement grouping) {
 739             super.writer.startGroupingNode(grouping.rawArgument());
 740             emitDocumentedNodeWithStatus(grouping);
 741             emitDataNodeContainer(grouping);
 742             emitUnknownStatementNodes(grouping);
 743             emitNotifications(grouping.getNotifications());
 744             emitActions(grouping.getActions());
 745             super.writer.endNode();
 746
 747         }
 748
 749         private void emitContainer(final ContainerStatement container) {
 750             super.writer.startContainerNode(container.rawArgument());
 751             emitWhen(container.getWhenStatement());
 752             emitMustNodes(container.getMusts());
 753             emitIfFeatures(container.getIfFeatures());
 754             emitPresenceNode(container.getPresence());
 755             emitConfigNode(container.getConfig());
 756             emitDocumentedNodeWithStatus(container);
 757             emitDataNodeContainer(container);
 758             emitUnknownStatementNodes(container);
 759             emitNotifications(container.getNotifications());
 760             emitActions(container.getActions());
 761             super.writer.endNode();
 762
 763         }
 764
 765         private void emitLeaf(final LeafStatement leaf) {
 766             super.writer.startLeafNode(leaf.rawArgument());
 767             emitWhen(leaf.getWhenStatement());
 768             emitIfFeatures(leaf.getIfFeatures());
 769             emitType(leaf.getType());
 770             emitUnitsNode(leaf.getUnits());
 771             emitMustNodes(leaf.getMusts());
 772             emitDefaultNode(leaf.getDefault());
 773             emitConfigNode(leaf.getConfig());
 774             emitMandatoryNode(leaf.getMandatory());
 775             emitDocumentedNodeWithStatus(leaf);
 776             emitUnknownStatementNodes(leaf);
 777             super.writer.endNode();
 778         }
 779
 780         private void emitLeafList(final LeafListStatement leafList) {
 781             super.writer.startLeafListNode(leafList.rawArgument());
 782             emitWhen(leafList.getWhenStatement());
 783             emitIfFeatures(leafList.getIfFeatures());
 784             emitType(leafList.getType());
 785             emitUnitsNode(leafList.getUnits());
 786             emitMustNodes(leafList.getMusts());
 787             emitConfigNode(leafList.getConfig());
 788             emitDefaultNodes(leafList.getDefaults());
 789             emitMinElementsNode(leafList.getMinElements());
 790             emitMaxElementsNode(leafList.getMaxElements());
 791             emitOrderedBy(leafList.getOrderedBy());
 792             emitDocumentedNodeWithStatus(leafList);
 793             emitUnknownStatementNodes(leafList);
 794             super.writer.endNode();
 795         }
 796
 797         private void emitList(final ListStatement list) {
 798             super.writer.startListNode(list.rawArgument());
 799             emitWhen(list.getWhenStatement());
 800             emitIfFeatures(list.getIfFeatures());
 801             emitMustNodes(list.getMusts());
 802             emitKey(list.getKey());
 803             emitUniqueConstraints(list.getUnique());
 804             emitConfigNode(list.getConfig());
 805             emitMinElementsNode(list.getMinElements());
 806             emitMaxElementsNode(list.getMaxElements());
 807             emitOrderedBy(list.getOrderedBy());
 808             emitDocumentedNodeWithStatus(list);
 809             emitDataNodeContainer(list);
 810             emitUnknownStatementNodes(list);
 811             emitNotifications(list.getNotifications());
 812             emitActions(list.getActions());
 813             super.writer.endNode();
 814         }
 815
 816         private void emitMustNodes(final Collection<? extends MustStatement> collection) {
 817             for (final MustStatement must : collection) {
 818                 emitMust(must);
 819             }
 820         }
 821
 822         private void emitKey(final KeyStatement keyStatement) {
 823             if (keyStatement != null) {
 824                 super.writer.startKeyNode(keyStatement.rawArgument());
 825                 super.writer.endNode();
 826             }
 827         }
 828
 829         private void emitUniqueConstraints(final Collection<? extends UniqueStatement> collection) {
 830             for (final UniqueStatement uniqueConstraint : collection) {
 831                 emitUnique(uniqueConstraint);
 832             }
 833         }
 834
 835         private void emitUnique(final UniqueStatement uniqueConstraint) {
 836             if (uniqueConstraint != null) {
 837                 super.writer.startUniqueNode(uniqueConstraint.rawArgument());
 838                 super.writer.endNode();
 839             }
 840         }
 841
 842         private void emitChoice(final ChoiceStatement choice) {
 843             super.writer.startChoiceNode(choice.rawArgument());
 844             emitWhen(choice.getWhenStatement());
 845             emitIfFeatures(choice.getIfFeatures());
 846             emitDefaultNode(choice.getDefault());
 847             emitConfigNode(choice.getConfig());
 848             emitMandatoryNode(choice.getMandatory());
 849             emitDocumentedNodeWithStatus(choice);
 850             emitCases(choice.getCases());
 851             emitUnknownStatementNodes(choice);
 852             super.writer.endNode();
 853         }
 854
 855         private void emitShortCases(final Collection<? extends DeclaredStatement<?>> declaredSubstatements) {
 856             for (final DeclaredStatement<?> child : declaredSubstatements) {
 857                 if (child instanceof ContainerStatement) {
 858                     emitContainer((ContainerStatement) child);
 859                 } else if (child instanceof LeafStatement) {
 860                     emitLeaf((LeafStatement) child);
 861                 } else if (child instanceof LeafListStatement) {
 862                     emitLeafList((LeafListStatement) child);
 863                 } else if (child instanceof ListStatement) {
 864                     emitList((ListStatement) child);
 865                 } else if (child instanceof ChoiceStatement) {
 866                     emitChoice((ChoiceStatement) child);
 867                 } else if (child instanceof AnyxmlStatement) {
 868                     emitAnyxml((AnyxmlStatement) child);
 869                 } else if (child instanceof AnydataStatement) {
 870                     emitAnydata((AnydataStatement) child);
 871                 }
 872             }
 873         }
 874
 875         private void emitCases(final Collection<? extends CaseStatement> cases) {
 876             for (final CaseStatement caze : cases) {
 877                 if (isExplicitStatement(caze)) {
 878                     emitCaseNode(caze);
 879                 } else {
 880                     final Collection<? extends DeclaredStatement<?>> shortCaseChilds = caze.declaredSubstatements();
 881                     Preconditions.checkState(shortCaseChilds.size() == 1,
 882                             "Only one child is allowed for each short case node");
 883                     emitShortCases(shortCaseChilds);
 884                 }
 885             }
 886         }
 887
 888         private void emitCaseNode(final CaseStatement caze) {
 889             super.writer.startCaseNode(caze.rawArgument());
 890             emitWhen(caze.getWhenStatement());
 891             emitIfFeatures(caze.getIfFeatures());
 892             emitDocumentedNodeWithStatus(caze);
 893             emitDataNodeContainer(caze);
 894             emitUnknownStatementNodes(caze);
 895             super.writer.endNode();
 896         }
 897
 898         private void emitAnyxml(final AnyxmlStatement anyxml) {
 899             super.writer.startAnyxmlNode(anyxml.rawArgument());
 900             emitDocumentedNodeWithStatus(anyxml);
 901             emitWhen(anyxml.getWhenStatement());
 902             emitIfFeatures(anyxml.getIfFeatures());
 903             emitMustNodes(anyxml.getMusts());
 904             emitConfigNode(anyxml.getConfig());
 905             emitMandatoryNode(anyxml.getMandatory());
 906             emitDocumentedNodeWithStatus(anyxml);
 907             emitUnknownStatementNodes(anyxml);
 908             super.writer.endNode();
 909         }
 910
 911         private void emitAnydata(final AnydataStatement anydata) {
 912             super.writer.startAnydataNode(anydata.rawArgument());
 913             emitWhen(anydata.getWhenStatement());
 914             emitIfFeatures(anydata.getIfFeatures());
 915             emitMustNodes(anydata.getMusts());
 916             emitConfigNode(anydata.getConfig());
 917             emitMandatoryNode(anydata.getMandatory());
 918             emitDocumentedNodeWithStatus(anydata);
 919             emitUnknownStatementNodes(anydata);
 920             super.writer.endNode();
 921         }
 922
 923         private void emitUsesNode(final UsesStatement uses) {
 924             super.writer.startUsesNode(uses.rawArgument());
 925             emitWhen(uses.getWhenStatement());
 926             emitIfFeatures(uses.getIfFeatures());
 927             emitDocumentedNodeWithStatus(uses);
 928             for (final RefineStatement refine : uses.getRefines()) {
 929                 emitRefine(refine);
 930             }
 931             for (final AugmentStatement aug : uses.getAugments()) {
 932                 emitUsesAugmentNode(aug);
 933             }
 934             super.writer.endNode();
 935         }
 936
 937         private void emitRefine(final RefineStatement refine) {
 938             super.writer.startRefineNode(refine.rawArgument());
 939             emitDocumentedNode(refine);
 940             emitIfFeatures(refine.getIfFeatures());
 941             emitMustNodes(refine.getMusts());
 942             emitPresenceNode(refine.getPresence());
 943             emitDefaultNodes(refine.getDefaults());
 944             emitConfigNode(refine.getConfig());
 945             emitMandatoryNode(refine.getMandatory());
 946             emitMinElementsNode(refine.getMinElements());
 947             emitMaxElementsNode(refine.getMaxElements());
 948             super.writer.endNode();
 949         }
 950
 951         private void emitUsesAugmentNode(final AugmentStatement aug) {
 952             /**
 953              * differs only in location in schema, otherwise currently (as of
 954              * RFC6020) it is same, so we could freely reuse path.
 955              */
 956             emitAugment(aug);
 957         }
 958
 959         private void emitAugment(final AugmentStatement augmentation) {
 960             super.writer.startAugmentNode(augmentation.rawArgument());
 961             emitIfFeatures(augmentation.getIfFeatures());
 962             emitWhen(augmentation.getWhenStatement());
 963             emitDocumentedNodeWithStatus(augmentation);
 964             emitDataNodeContainer(augmentation);
 965             emitCases(augmentation.getCases());
 966             emitUnknownStatementNodes(augmentation);
 967             emitNotifications(augmentation.getNotifications());
 968             emitActions(augmentation.getActions());
 969             super.writer.endNode();
 970         }
 971
 972         private void emitUnknownStatementNodes(final DeclaredStatement<?> decaredStmt) {
 973             final Collection<? extends DeclaredStatement<?>> unknownStmts = Collections2
 974                     .filter(decaredStmt.declaredSubstatements(), Predicates.instanceOf(UnknownStatement.class));
 975             for (final DeclaredStatement<?> unknonwnStmt : unknownStmts) {
 976                 emitUnknownStatementNode(unknonwnStmt);
 977             }
 978         }
 979
 980         private void emitUnknownStatementNode(final DeclaredStatement<?> unknonwnStmt) {
 981             final StatementDefinition def = unknonwnStmt.statementDefinition();
 982             if (def.getArgumentName() == null) {
 983                 super.writer.startUnknownNode(def);
 984             } else {
 985                 super.writer.startUnknownNode(def, unknonwnStmt.rawArgument());
 986             }
 987             emitUnknownStatementNodes(unknonwnStmt);
 988             super.writer.endNode();
 989         }
 990
 991         private void emitWhen(final WhenStatement whenStatement) {
 992             if (whenStatement != null) {
 993                 super.writer.startWhenNode(whenStatement.rawArgument());
 994                 emitDocumentedNode(whenStatement);
 995                 super.writer.endNode();
 996             }
 997         }
 998
 999         private void emitRpc(final RpcStatement rpc) {
1000             super.writer.startRpcNode(rpc.rawArgument());
1001             emitOperationBody(rpc);
1002             emitUnknownStatementNodes(rpc);
1003             super.writer.endNode();
1004         }
1005
1006         private void emitOperationBody(final OperationGroup operationStmt) {
1007             emitIfFeatures(operationStmt.getIfFeatures());
1008             emitStatusNode(operationStmt.getStatus());
1009             emitDescriptionNode(operationStmt.getDescription());
1010             emitReferenceNode(operationStmt.getReference());
1011
1012             for (final TypedefStatement typedef : operationStmt.getTypedefs()) {
1013                 emitTypedefNode(typedef);
1014             }
1015             for (final GroupingStatement grouping : operationStmt.getGroupings()) {
1016                 emitGrouping(grouping);
1017             }
1018             emitInput(operationStmt.getInput());
1019             emitOutput(operationStmt.getOutput());
1020         }
1021
1022         private void emitActions(final Collection<? extends ActionStatement> collection) {
1023             for (final ActionStatement actionDefinition : collection) {
1024                 emitAction(actionDefinition);
1025             }
1026         }
1027
1028         private void emitAction(final ActionStatement actionDefinition) {
1029             super.writer.startActionNode(actionDefinition.rawArgument());
1030             emitOperationBody(actionDefinition);
1031             emitUnknownStatementNodes(actionDefinition);
1032             super.writer.endNode();
1033         }
1034
1035         private void emitInput(final InputStatement inputStatement) {
1036             if (isExplicitStatement(inputStatement)) {
1037                 super.writer.startInputNode();
1038                 emitMustNodes(inputStatement.getMusts());
1039                 emitDataNodeContainer(inputStatement);
1040                 emitUnknownStatementNodes(inputStatement);
1041                 super.writer.endNode();
1042             }
1043         }
1044
1045         private void emitOutput(final OutputStatement output) {
1046             if (isExplicitStatement(output)) {
1047                 super.writer.startOutputNode();
1048                 emitMustNodes(output.getMusts());
1049                 emitDataNodeContainer(output);
1050                 emitUnknownStatementNodes(output);
1051                 super.writer.endNode();
1052             }
1053         }
1054
1055         private static boolean isExplicitStatement(final DeclaredStatement<?> stmt) {
1056             return stmt != null && stmt.getStatementSource() == StatementSource.DECLARATION;
1057         }
1058
1059         private void emitNotifications(final Collection<? extends NotificationStatement> collection) {
1060             for (final NotificationStatement notification : collection) {
1061                 emitNotificationNode(notification);
1062             }
1063         }
1064
1065         private void emitNotificationNode(final NotificationStatement notification) {
1066             super.writer.startNotificationNode(notification.rawArgument());
1067             emitIfFeatures(notification.getIfFeatures());
1068             emitMustNodes(notification.getMusts());
1069             emitDocumentedNodeWithStatus(notification);
1070             emitDataNodeContainer(notification);
1071             emitUnknownStatementNodes(notification);
1072             super.writer.endNode();
1073         }
1074
1075         private void emitDeviation(final DeviationStatement deviation) {
1076             super.writer.startDeviationNode(deviation.rawArgument());
1077             emitDeviateStatements(deviation.getDeviateStatements());
1078             emitUnknownStatementNodes(deviation);
1079             super.writer.endNode();
1080         }
1081
1082         private void emitDeviateStatements(final Collection<? extends DeviateStatement> deviateStatements) {
1083             for (final DeviateStatement deviateStatement : deviateStatements) {
1084                 emitDeviate(deviateStatement);
1085             }
1086         }
1087
1088         private void emitDeviate(final DeviateStatement deviateStatement) {
1089             super.writer.startDeviateNode(deviateStatement.rawArgument());
1090             /*
1091              * :FIXME Currently, DeviateStatementImpl contains implementation
1092              * for all deviate types (i.e. add, replace, delete). However it
1093              * would be better to create subinterfaces of DeviateStatement for
1094              * each deviate type (i.e. AddDeviateStatement,
1095              * ReplaceDeviateStatement,..) and create argument specific supports
1096              * (i.e. definitions) for each deviate type (very similarly like by
1097              * TypeStatement).
1098              */
1099             for (final DeclaredStatement<?> child : deviateStatement.declaredSubstatements()) {
1100                 if (child instanceof MustStatement) {
1101                     emitMust((MustStatement) child);
1102                 } else if (child instanceof DefaultStatement) {
1103                     emitDefaultNode((DefaultStatement) child);
1104                 } else if (child instanceof UniqueStatement) {
1105                     emitUnique((UniqueStatement) child);
1106                 } else if (child instanceof UnitsStatement) {
1107                     emitUnitsNode((UnitsStatement) child);
1108                 } else if (child instanceof TypeStatement) {
1109                     emitType((TypeStatement) child);
1110                 } else if (child instanceof MinElementsStatement) {
1111                     emitMinElementsNode((MinElementsStatement) child);
1112                 } else if (child instanceof MaxElementsStatement) {
1113                     emitMaxElementsNode((MaxElementsStatement) child);
1114                 } else if (child instanceof MandatoryStatement) {
1115                     emitMandatoryNode((MandatoryStatement) child);
1116                 } else if (child instanceof ConfigStatement) {
1117                     emitConfigNode((ConfigStatement) child);
1118                 } else if (child instanceof UnknownStatement) {
1119                     emitUnknownStatementNode(child);
1120                 }
1121             }
1122             super.writer.endNode();
1123         }
1124     }
1125
1126     static class EffectiveSchemaContextEmitter extends SchemaContextEmitter {
1127
1128         EffectiveSchemaContextEmitter(final YangModuleWriter writer, final Map<QName, StatementDefinition> extensions,
1129                 final YangVersion yangVersion, final boolean emitInstantiated) {
1130             super(writer, extensions, yangVersion, emitInstantiated, true);
1131         }
1132
1133         void emitModule(final Module input) {
1134             super.writer.startModuleNode(input.getName());
1135             emitModuleHeader(input);
1136             emitLinkageNodes(input);
1137             emitMetaNodes(input);
1138             emitRevisionNodes(input);
1139             emitBodyNodes(input);
1140             super.writer.endNode();
1141         }
1142
1143         private void emitModuleHeader(final Module input) {
1144             emitYangVersionNode(input.getYangVersion());
1145             emitNamespace(input.getNamespace());
1146             emitPrefixNode(input.getPrefix());
1147         }
1148
1149         @SuppressWarnings("unused")
1150         private void emitSubmodule(final String input) {
1151             /*
1152              * FIXME: BUG-2444: Implement submodule export
1153              *
1154              * submoduleHeaderNodes linkageNodes metaNodes revisionNodes
1155              * bodyNodes super.writer.endNode();
1156              */
1157         }
1158
1159         @SuppressWarnings("unused")
1160         private void emitSubmoduleHeaderNodes(final Module input) {
1161             /*
1162              * FIXME: BUG-2444: Implement submodule headers properly
1163              *
1164              * :yangVersionNode //Optional
1165              *
1166              * :belongsToNode
1167              */
1168         }
1169
1170         private void emitMetaNodes(final Module input) {
1171             input.getOrganization().ifPresent(this::emitOrganizationNode);
1172             input.getContact().ifPresent(this::emitContact);
1173             emitDocumentedNode(input);
1174         }
1175
1176         private void emitLinkageNodes(final Module input) {
1177             for (final ModuleImport importNode : input.getImports()) {
1178                 emitImport(importNode);
1179             }
1180             /*
1181              * FIXME: BUG-2444: Emit include statements
1182              */
1183         }
1184
1185         private void emitRevisionNodes(final Module input) {
1186             /*
1187              * FIXME: BUG-2444: emit revisions properly, when parsed model will
1188              * provide enough information
1189              */
1190             input.getRevision().ifPresent(this::emitRevision);
1191         }
1192
1193         private void emitBodyNodes(final Module input) {
1194
1195             for (final ExtensionDefinition extension : input.getExtensionSchemaNodes()) {
1196                 emitExtension(extension);
1197             }
1198             for (final FeatureDefinition definition : input.getFeatures()) {
1199                 emitFeature(definition);
1200             }
1201             for (final IdentitySchemaNode identity : input.getIdentities()) {
1202                 emitIdentity(identity);
1203             }
1204             for (final Deviation deviation : input.getDeviations()) {
1205                 emitDeviation(deviation);
1206             }
1207
1208             emitDataNodeContainer(input);
1209
1210             for (final AugmentationSchemaNode augmentation : input.getAugmentations()) {
1211                 emitAugment(augmentation);
1212             }
1213             for (final RpcDefinition rpc : input.getRpcs()) {
1214                 emitRpc(rpc);
1215             }
1216
1217             emitNotifications(input.getNotifications());
1218         }
1219
1220         private void emitDataNodeContainer(final DataNodeContainer input) {
1221             for (final TypeDefinition<?> typedef : input.getTypeDefinitions()) {
1222                 emitTypedefNode(typedef);
1223             }
1224             for (final GroupingDefinition grouping : input.getGroupings()) {
1225                 emitGrouping(grouping);
1226             }
1227             for (final DataSchemaNode child : input.getChildNodes()) {
1228                 emitDataSchemaNode(child);
1229             }
1230             for (final UsesNode usesNode : input.getUses()) {
1231                 emitUsesNode(usesNode);
1232             }
1233         }
1234
1235         private void emitDataSchemaNode(final DataSchemaNode child) {
1236             if (!super.emitInstantiated && (child.isAddedByUses() || child.isAugmenting())) {
1237                 // We skip instantiated nodes.
1238                 return;
1239             }
1240
1241             if (child instanceof ContainerSchemaNode) {
1242                 emitContainer((ContainerSchemaNode) child);
1243             } else if (child instanceof LeafSchemaNode) {
1244                 emitLeaf((LeafSchemaNode) child);
1245             } else if (child instanceof LeafListSchemaNode) {
1246                 emitLeafList((LeafListSchemaNode) child);
1247             } else if (child instanceof ListSchemaNode) {
1248                 emitList((ListSchemaNode) child);
1249             } else if (child instanceof ChoiceSchemaNode) {
1250                 emitChoice((ChoiceSchemaNode) child);
1251             } else if (child instanceof AnyXmlSchemaNode) {
1252                 emitAnyxml((AnyXmlSchemaNode) child);
1253             } else if (child instanceof AnyDataSchemaNode) {
1254                 emitAnydata((AnyDataSchemaNode) child);
1255             } else {
1256                 throw new UnsupportedOperationException("Not supported DataSchemaNode type " + child.getClass());
1257             }
1258         }
1259
1260         private void emitYangVersionNode(final YangVersion input) {
1261             super.writer.startYangVersionNode(input.toString());
1262             super.writer.endNode();
1263         }
1264
1265         private void emitImport(final ModuleImport importNode) {
1266             super.writer.startImportNode(importNode.getModuleName());
1267             emitDocumentedNode(importNode);
1268             emitPrefixNode(importNode.getPrefix());
1269             importNode.getRevision().ifPresent(this::emitRevisionDateNode);
1270             super.writer.endNode();
1271         }
1272
1273         @SuppressWarnings("unused")
1274         private void emitInclude(final String input) {
1275             /*
1276              * FIXME: BUG-2444: Implement proper export of include statements
1277              * startIncludeNode(IdentifierHelper.getIdentifier(String :input));
1278              *
1279              *
1280              * :revisionDateNode :super.writer.endNode();)
1281              */
1282         }
1283
1284         private void emitNamespace(final URI uri) {
1285             super.writer.startNamespaceNode(uri);
1286             super.writer.endNode();
1287
1288         }
1289
1290         private void emitPrefixNode(final String input) {
1291             super.writer.startPrefixNode(input);
1292             super.writer.endNode();
1293
1294         }
1295
1296         @SuppressWarnings("unused")
1297         private void emitBelongsTo(final String input) {
1298             /*
1299              * FIXME: BUG-2444: Implement proper export of belongs-to statements
1300              * startIncludeNode(IdentifierHelper.getIdentifier(String :input));
1301              *
1302              *
1303              * :super.writer.startBelongsToNode(IdentifierHelper.getIdentifier(
1304              * String :input));
1305              *
1306              *
1307              * :prefixNode :super.writer.endNode();
1308              *
1309              */
1310
1311         }
1312
1313         private void emitOrganizationNode(final String input) {
1314             super.writer.startOrganizationNode(input);
1315             super.writer.endNode();
1316         }
1317
1318         private void emitContact(final String input) {
1319             super.writer.startContactNode(input);
1320             super.writer.endNode();
1321         }
1322
1323         private void emitDescriptionNode(final String input) {
1324             super.writer.startDescriptionNode(input);
1325             super.writer.endNode();
1326         }
1327
1328         private void emitReferenceNode(final String input) {
1329             super.writer.startReferenceNode(input);
1330             super.writer.endNode();
1331         }
1332
1333         private void emitUnitsNode(@Nullable final String input) {
1334             super.writer.startUnitsNode(input);
1335             super.writer.endNode();
1336         }
1337
1338         private void emitRevision(final Revision date) {
1339             if (date != null) {
1340                 super.writer.startRevisionNode(date);
1341
1342                 // FIXME: BUG-2444: FIXME: BUG-2444: BUG-2417: descriptionNode
1343                 // //FIXME: BUG-2444: Optional
1344                 // FIXME: BUG-2444: FIXME: BUG-2444: BUG-2417: referenceNode
1345                 // //FIXME: BUG-2444: Optional
1346                 super.writer.endNode();
1347             }
1348         }
1349
1350         private void emitRevisionDateNode(final Revision date) {
1351             super.writer.startRevisionDateNode(date);
1352             super.writer.endNode();
1353         }
1354
1355         private void emitExtension(final ExtensionDefinition extension) {
1356             super.writer.startExtensionNode(extension.getQName());
1357             emitArgument(extension.getArgument(), extension.isYinElement());
1358             emitDocumentedNode(extension);
1359             emitUnknownStatementNodes(extension.getUnknownSchemaNodes());
1360             super.writer.endNode();
1361
1362         }
1363
1364         private void emitArgument(final @Nullable String input, final boolean yinElement) {
1365             if (input != null) {
1366                 super.writer.startArgumentNode(input);
1367                 emitYinElement(yinElement);
1368                 super.writer.endNode();
1369             }
1370
1371         }
1372
1373         private void emitYinElement(final boolean yinElement) {
1374             super.writer.startYinElementNode(yinElement);
1375             super.writer.endNode();
1376
1377         }
1378
1379         private void emitIdentity(final IdentitySchemaNode identity) {
1380             super.writer.startIdentityNode(identity.getQName());
1381             emitBaseIdentities(identity.getBaseIdentities());
1382             emitDocumentedNode(identity);
1383             super.writer.endNode();
1384         }
1385
1386         private void emitBaseIdentities(final Set<IdentitySchemaNode> identities) {
1387             for (final IdentitySchemaNode identitySchemaNode : identities) {
1388                 emitBase(identitySchemaNode.getQName());
1389             }
1390         }
1391
1392         private void emitBase(final QName qName) {
1393             super.writer.startBaseNode(qName);
1394             super.writer.endNode();
1395         }
1396
1397         private void emitFeature(final FeatureDefinition definition) {
1398             super.writer.startFeatureNode(definition.getQName());
1399
1400             // FIXME: BUG-2444: FIXME: BUG-2444: Expose ifFeature
1401             // *(ifFeatureNode )
1402             emitDocumentedNode(definition);
1403             super.writer.endNode();
1404         }
1405
1406         @SuppressWarnings("unused")
1407         private void emitIfFeature(final String input) {
1408             /*
1409              * FIXME: BUG-2444: Implement proper export of include statements
1410              * startIncludeNode(IdentifierHelper.getIdentifier(String :input));
1411              *
1412              */
1413         }
1414
1415         private void emitTypedefNode(final TypeDefinition<?> typedef) {
1416             super.writer.startTypedefNode(typedef.getQName());
1417             // Differentiate between derived type and existing type
1418             // name.
1419             emitTypeNodeDerived(typedef);
1420             typedef.getUnits().ifPresent(this::emitUnitsNode);
1421             typedef.getDefaultValue().ifPresent(this::emitDefaultNode);
1422             emitDocumentedNode(typedef);
1423             emitUnknownStatementNodes(typedef.getUnknownSchemaNodes());
1424             super.writer.endNode();
1425         }
1426
1427         private void emitTypeNode(final SchemaPath parentPath, final TypeDefinition<?> subtype) {
1428             final SchemaPath path = subtype.getPath();
1429             if (isPrefix(parentPath.getPathFromRoot(), path.getPathFromRoot())) {
1430                 emitTypeNodeDerived(subtype);
1431             } else {
1432                 emitTypeNodeReferenced(subtype);
1433             }
1434         }
1435
1436         private void emitTypeNodeReferenced(final TypeDefinition<?> typeDefinition) {
1437             super.writer.startTypeNode(typeDefinition.getQName());
1438             super.writer.endNode();
1439
1440         }
1441
1442         private void emitTypeNodeDerived(final TypeDefinition<?> typeDefinition) {
1443             final TypeDefinition<?> b = typeDefinition.getBaseType();
1444             final TypeDefinition<?> baseType = b == null ? typeDefinition : b;
1445             super.writer.startTypeNode(baseType.getQName());
1446             emitTypeBodyNodes(typeDefinition);
1447             super.writer.endNode();
1448
1449         }
1450
1451         private void emitTypeBodyNodes(final TypeDefinition<?> typeDef) {
1452             if (typeDef instanceof UnsignedIntegerTypeDefinition) {
1453                 emitUnsignedIntegerSpecification((UnsignedIntegerTypeDefinition) typeDef);
1454             } else if (typeDef instanceof IntegerTypeDefinition) {
1455                 emitIntegerSpefication((IntegerTypeDefinition) typeDef);
1456             } else if (typeDef instanceof DecimalTypeDefinition) {
1457                 emitDecimal64Specification((DecimalTypeDefinition) typeDef);
1458             } else if (typeDef instanceof StringTypeDefinition) {
1459                 emitStringRestrictions((StringTypeDefinition) typeDef);
1460             } else if (typeDef instanceof EnumTypeDefinition) {
1461                 emitEnumSpecification((EnumTypeDefinition) typeDef);
1462             } else if (typeDef instanceof LeafrefTypeDefinition) {
1463                 emitLeafrefSpecification((LeafrefTypeDefinition) typeDef);
1464             } else if (typeDef instanceof IdentityrefTypeDefinition) {
1465                 emitIdentityrefSpecification((IdentityrefTypeDefinition) typeDef);
1466             } else if (typeDef instanceof InstanceIdentifierTypeDefinition) {
1467                 emitInstanceIdentifierSpecification((InstanceIdentifierTypeDefinition) typeDef);
1468             } else if (typeDef instanceof BitsTypeDefinition) {
1469                 emitBitsSpecification((BitsTypeDefinition) typeDef);
1470             } else if (typeDef instanceof UnionTypeDefinition) {
1471                 emitUnionSpecification((UnionTypeDefinition) typeDef);
1472             } else if (typeDef instanceof BinaryTypeDefinition) {
1473                 ((BinaryTypeDefinition) typeDef).getLengthConstraint().ifPresent(this::emitLength);
1474             } else if (typeDef instanceof BooleanTypeDefinition || typeDef instanceof EmptyTypeDefinition) {
1475                 // NOOP
1476             } else {
1477                 throw new IllegalArgumentException("Not supported type " + typeDef.getClass());
1478             }
1479         }
1480
1481         private void emitIntegerSpefication(final IntegerTypeDefinition typeDef) {
1482             emitRangeNodeOptional(typeDef.getRangeConstraints());
1483         }
1484
1485         private void emitUnsignedIntegerSpecification(final UnsignedIntegerTypeDefinition typeDef) {
1486             emitRangeNodeOptional(typeDef.getRangeConstraints());
1487
1488         }
1489
1490         private void emitRangeNodeOptional(final List<RangeConstraint> list) {
1491             // FIXME: BUG-2444: Wrong decomposition in API, should be
1492             // LenghtConstraint
1493             // which contains ranges.
1494             if (!list.isEmpty()) {
1495                 super.writer.startRangeNode(toRangeString(list));
1496                 final RangeConstraint first = list.iterator().next();
1497                 first.getErrorMessage().ifPresent(this::emitErrorMessageNode);
1498                 first.getErrorAppTag().ifPresent(this::emitErrorAppTagNode);
1499                 emitDocumentedNode(first);
1500                 super.writer.endNode();
1501             }
1502
1503         }
1504
1505         private void emitDecimal64Specification(final DecimalTypeDefinition typeDefinition) {
1506             emitFranctionDigitsNode(typeDefinition.getFractionDigits());
1507             emitRangeNodeOptional(typeDefinition.getRangeConstraints());
1508         }
1509
1510         private void emitFranctionDigitsNode(final Integer fractionDigits) {
1511             super.writer.startFractionDigitsNode(fractionDigits);
1512             super.writer.endNode();
1513         }
1514
1515         private void emitStringRestrictions(final StringTypeDefinition typeDef) {
1516             typeDef.getLengthConstraint().ifPresent(this::emitLength);
1517
1518             for (final PatternConstraint pattern : typeDef.getPatternConstraints()) {
1519                 emitPatternNode(pattern);
1520             }
1521         }
1522
1523         private void emitLength(final LengthConstraint constraint) {
1524             super.writer.startLengthNode(toLengthString(constraint.getAllowedRanges()));
1525             constraint.getErrorMessage().ifPresent(this::emitErrorMessageNode);
1526             constraint.getErrorAppTag().ifPresent(this::emitErrorAppTagNode);
1527             emitDocumentedNode(constraint);
1528             super.writer.endNode();
1529         }
1530
1531         private static String toLengthString(final RangeSet<Integer> ranges) {
1532             final Iterator<Range<Integer>> it = ranges.asRanges().iterator();
1533             if (!it.hasNext()) {
1534                 return "";
1535             }
1536
1537             final StringBuilder sb = new StringBuilder();
1538             boolean haveNext;
1539             do {
1540                 final Range<Integer> current = it.next();
1541                 haveNext = it.hasNext();
1542                 appendRange(sb, current.lowerEndpoint(), current.upperEndpoint(), haveNext);
1543             } while (haveNext);
1544
1545             return sb.toString();
1546         }
1547
1548         private static String toRangeString(final List<RangeConstraint> list) {
1549             final Iterator<RangeConstraint> it = list.iterator();
1550             if (!it.hasNext()) {
1551                 return "";
1552             }
1553
1554             final StringBuilder sb = new StringBuilder();
1555             boolean haveNext;
1556             do {
1557                 final RangeConstraint current = it.next();
1558                 haveNext = it.hasNext();
1559                 appendRange(sb, current.getMin(), current.getMax(), haveNext);
1560             } while (haveNext);
1561
1562             return sb.toString();
1563         }
1564
1565         private static void appendRange(final StringBuilder sb, final Number min, final Number max,
1566                 final boolean haveNext) {
1567             sb.append(min);
1568             if (!min.equals(max)) {
1569                 sb.append("..");
1570                 sb.append(max);
1571             }
1572             if (haveNext) {
1573                 sb.append('|');
1574             }
1575         }
1576
1577         private void emitPatternNode(final PatternConstraint pattern) {
1578             super.writer.startPatternNode(pattern.getRegularExpressionString());
1579             pattern.getErrorMessage().ifPresent(this::emitErrorMessageNode);
1580             pattern.getErrorAppTag().ifPresent(this::emitErrorAppTagNode);
1581             emitDocumentedNode(pattern);
1582             pattern.getModifier().ifPresent(this::emitModifier);
1583             super.writer.endNode();
1584         }
1585
1586         private void emitModifier(final ModifierKind modifier) {
1587             super.writer.startModifierNode(modifier);
1588             super.writer.endNode();
1589         }
1590
1591         private void emitDefaultNodes(final Collection<String> defaults) {
1592             for (final String defaultValue : defaults) {
1593                 emitDefaultNode(defaultValue);
1594             }
1595         }
1596
1597         private void emitDefaultNode(@Nullable final Object object) {
1598             super.writer.startDefaultNode(object.toString());
1599             super.writer.endNode();
1600         }
1601
1602         private void emitEnumSpecification(final EnumTypeDefinition typeDefinition) {
1603             for (final EnumPair enumValue : typeDefinition.getValues()) {
1604                 emitEnumNode(enumValue);
1605             }
1606         }
1607
1608         private void emitEnumNode(final EnumPair enumValue) {
1609             super.writer.startEnumNode(enumValue.getName());
1610             emitValueNode(enumValue.getValue());
1611             emitDocumentedNode(enumValue);
1612             super.writer.endNode();
1613         }
1614
1615         private void emitLeafrefSpecification(final LeafrefTypeDefinition typeDefinition) {
1616             emitPathNode(typeDefinition.getPathStatement());
1617             if (YangVersion.VERSION_1_1 == super.yangVersion) {
1618                 emitRequireInstanceNode(typeDefinition.requireInstance());
1619             }
1620         }
1621
1622         private void emitPathNode(final RevisionAwareXPath revisionAwareXPath) {
1623             super.writer.startPathNode(revisionAwareXPath);
1624             super.writer.endNode();
1625         }
1626
1627         private void emitRequireInstanceNode(final boolean require) {
1628             super.writer.startRequireInstanceNode(require);
1629             super.writer.endNode();
1630         }
1631
1632         private void emitInstanceIdentifierSpecification(final InstanceIdentifierTypeDefinition typeDefinition) {
1633             emitRequireInstanceNode(typeDefinition.requireInstance());
1634         }
1635
1636         private void emitIdentityrefSpecification(final IdentityrefTypeDefinition typeDefinition) {
1637             emitBaseIdentities(typeDefinition.getIdentities());
1638         }
1639
1640         private void emitUnionSpecification(final UnionTypeDefinition typeDefinition) {
1641             for (final TypeDefinition<?> subtype : typeDefinition.getTypes()) {
1642                 // FIXME: BUG-2444: What if we have locally modified types here?
1643                 // is solution to look-up in schema path?
1644                 emitTypeNode(typeDefinition.getPath(), subtype);
1645             }
1646         }
1647
1648         private void emitBitsSpecification(final BitsTypeDefinition typeDefinition) {
1649             for (final Bit bit : typeDefinition.getBits()) {
1650                 emitBit(bit);
1651             }
1652         }
1653
1654         private void emitBit(final Bit bit) {
1655             super.writer.startBitNode(bit.getName());
1656             emitPositionNode(bit.getPosition());
1657             emitDocumentedNode(bit);
1658             super.writer.endNode();
1659         }
1660
1661         private void emitPositionNode(@Nullable final Long position) {
1662             if (position != null) {
1663                 super.writer.startPositionNode(UnsignedInteger.valueOf(position));
1664                 super.writer.endNode();
1665             }
1666         }
1667
1668         private void emitStatusNode(@Nullable final Status status) {
1669             if (status != null) {
1670                 super.writer.startStatusNode(status);
1671                 super.writer.endNode();
1672             }
1673         }
1674
1675         private void emitConfigNode(final boolean config) {
1676             super.writer.startConfigNode(config);
1677             super.writer.endNode();
1678         }
1679
1680         private void emitMandatoryNode(final boolean mandatory) {
1681             super.writer.startMandatoryNode(mandatory);
1682             super.writer.endNode();
1683         }
1684
1685         private void emitPresenceNode(final boolean presence) {
1686             super.writer.startPresenceNode(presence);
1687             super.writer.endNode();
1688         }
1689
1690         private void emitOrderedBy(final boolean userOrdered) {
1691             if (userOrdered) {
1692                 super.writer.startOrderedByNode("user");
1693             } else {
1694                 super.writer.startOrderedByNode("system");
1695             }
1696             super.writer.endNode();
1697         }
1698
1699         private void emitMust(@Nullable final MustDefinition mustCondition) {
1700             if (mustCondition != null && mustCondition.getXpath() != null) {
1701                 super.writer.startMustNode(mustCondition.getXpath());
1702                 mustCondition.getErrorMessage().ifPresent(this::emitErrorMessageNode);
1703                 mustCondition.getErrorAppTag().ifPresent(this::emitErrorAppTagNode);
1704                 emitDocumentedNode(mustCondition);
1705                 super.writer.endNode();
1706             }
1707         }
1708
1709         private void emitErrorMessageNode(@Nullable final String input) {
1710             super.writer.startErrorMessageNode(input);
1711             super.writer.endNode();
1712         }
1713
1714         private void emitErrorAppTagNode(final String input) {
1715             super.writer.startErrorAppTagNode(input);
1716             super.writer.endNode();
1717         }
1718
1719         private void emitMinElementsNode(final Integer min) {
1720             if (min != null) {
1721                 super.writer.startMinElementsNode(min);
1722                 super.writer.endNode();
1723             }
1724         }
1725
1726         private void emitMaxElementsNode(final Integer max) {
1727             if (max != null) {
1728                 super.writer.startMaxElementsNode(max);
1729                 super.writer.endNode();
1730             }
1731         }
1732
1733         private void emitValueNode(@Nullable final Integer value) {
1734             if (value != null) {
1735                 super.writer.startValueNode(value);
1736                 super.writer.endNode();
1737             }
1738         }
1739
1740         private void emitDocumentedNode(final DocumentedNode input) {
1741             input.getDescription().ifPresent(this::emitDescriptionNode);
1742             input.getReference().ifPresent(this::emitReferenceNode);
1743         }
1744
1745         private void emitDocumentedNode(final DocumentedNode.WithStatus input) {
1746             emitStatusNode(input.getStatus());
1747             emitDocumentedNode((DocumentedNode) input);
1748         }
1749
1750         private void emitGrouping(final GroupingDefinition grouping) {
1751             super.writer.startGroupingNode(grouping.getQName());
1752             emitDocumentedNode(grouping);
1753             emitDataNodeContainer(grouping);
1754             emitUnknownStatementNodes(grouping.getUnknownSchemaNodes());
1755             emitNotifications(grouping.getNotifications());
1756             emitActions(grouping.getActions());
1757             super.writer.endNode();
1758
1759         }
1760
1761         private void emitContainer(final ContainerSchemaNode child) {
1762             super.writer.startContainerNode(child.getQName());
1763             emitConstraints(child.getConstraints());
1764             // FIXME: BUG-2444: whenNode //:Optional
1765             // FIXME: BUG-2444: *(ifFeatureNode )
1766             emitPresenceNode(child.isPresenceContainer());
1767             emitConfigNode(child.isConfiguration());
1768             emitDocumentedNode(child);
1769             emitDataNodeContainer(child);
1770             emitUnknownStatementNodes(child.getUnknownSchemaNodes());
1771             emitNotifications(child.getNotifications());
1772             emitActions(child.getActions());
1773             super.writer.endNode();
1774
1775         }
1776
1777         private void emitConstraints(final ConstraintDefinition constraints) {
1778             constraints.getWhenCondition().ifPresent(this::emitWhen);
1779             for (final MustDefinition mustCondition : constraints.getMustConstraints()) {
1780                 emitMust(mustCondition);
1781             }
1782         }
1783
1784         private void emitLeaf(final LeafSchemaNode child) {
1785             super.writer.startLeafNode(child.getQName());
1786             child.getConstraints().getWhenCondition().ifPresent(this::emitWhen);
1787             // FIXME: BUG-2444: *(ifFeatureNode )
1788             emitTypeNode(child.getPath(), child.getType());
1789             child.getType().getUnits().ifPresent(this::emitUnitsNode);
1790             emitMustNodes(child.getConstraints().getMustConstraints());
1791             child.getType().getDefaultValue().ifPresent(this::emitDefaultNode);
1792             emitConfigNode(child.isConfiguration());
1793             emitMandatoryNode(child.getConstraints().isMandatory());
1794             emitDocumentedNode(child);
1795             emitUnknownStatementNodes(child.getUnknownSchemaNodes());
1796             super.writer.endNode();
1797
1798         }
1799
1800         private void emitLeafList(final LeafListSchemaNode child) {
1801             super.writer.startLeafListNode(child.getQName());
1802
1803             child.getConstraints().getWhenCondition().ifPresent(this::emitWhen);
1804             // FIXME: BUG-2444: *(ifFeatureNode )
1805             emitTypeNode(child.getPath(), child.getType());
1806             child.getType().getUnits().ifPresent(this::emitUnitsNode);
1807             // FIXME: BUG-2444: unitsNode /Optional
1808             emitMustNodes(child.getConstraints().getMustConstraints());
1809             emitConfigNode(child.isConfiguration());
1810             emitDefaultNodes(child.getDefaults());
1811             emitMinElementsNode(child.getConstraints().getMinElements());
1812             emitMaxElementsNode(child.getConstraints().getMaxElements());
1813             emitOrderedBy(child.isUserOrdered());
1814             emitDocumentedNode(child);
1815             emitUnknownStatementNodes(child.getUnknownSchemaNodes());
1816             super.writer.endNode();
1817
1818         }
1819
1820         private void emitList(final ListSchemaNode child) {
1821             super.writer.startListNode(child.getQName());
1822             child.getConstraints().getWhenCondition().ifPresent(this::emitWhen);
1823
1824             // FIXME: BUG-2444: *(ifFeatureNode )
1825             emitMustNodes(child.getConstraints().getMustConstraints());
1826             emitKey(child.getKeyDefinition());
1827             emitUniqueConstraints(child.getUniqueConstraints());
1828             emitConfigNode(child.isConfiguration());
1829             emitMinElementsNode(child.getConstraints().getMinElements());
1830             emitMaxElementsNode(child.getConstraints().getMaxElements());
1831             emitOrderedBy(child.isUserOrdered());
1832             emitDocumentedNode(child);
1833             emitDataNodeContainer(child);
1834             emitUnknownStatementNodes(child.getUnknownSchemaNodes());
1835             emitNotifications(child.getNotifications());
1836             emitActions(child.getActions());
1837             super.writer.endNode();
1838
1839         }
1840
1841         private void emitMustNodes(final Collection<MustDefinition> mustConstraints) {
1842             for (final MustDefinition must : mustConstraints) {
1843                 emitMust(must);
1844             }
1845         }
1846
1847         private void emitKey(final List<QName> keyList) {
1848             if (keyList != null && !keyList.isEmpty()) {
1849                 super.writer.startKeyNode(keyList);
1850                 super.writer.endNode();
1851             }
1852         }
1853
1854         private void emitUniqueConstraints(final Collection<UniqueConstraint> uniqueConstraints) {
1855             for (final UniqueConstraint uniqueConstraint : uniqueConstraints) {
1856                 emitUnique(uniqueConstraint);
1857             }
1858         }
1859
1860         private void emitUnique(final UniqueConstraint uniqueConstraint) {
1861             super.writer.startUniqueNode(uniqueConstraint);
1862             super.writer.endNode();
1863         }
1864
1865         private void emitChoice(final ChoiceSchemaNode choice) {
1866             super.writer.startChoiceNode(choice.getQName());
1867             choice.getConstraints().getWhenCondition().ifPresent(this::emitWhen);
1868             // FIXME: BUG-2444: *(ifFeatureNode )
1869             // FIXME: BUG-2444: defaultNode //Optional
1870             emitConfigNode(choice.isConfiguration());
1871             emitMandatoryNode(choice.getConstraints().isMandatory());
1872             emitDocumentedNode(choice);
1873             for (final ChoiceCaseNode caze : choice.getCases().values()) {
1874                 // TODO: emit short case?
1875                 emitCaseNode(caze);
1876             }
1877             emitUnknownStatementNodes(choice.getUnknownSchemaNodes());
1878             super.writer.endNode();
1879         }
1880
1881         private void emitCaseNode(final ChoiceCaseNode caze) {
1882             if (!super.emitInstantiated && caze.isAugmenting()) {
1883                 return;
1884             }
1885             super.writer.startCaseNode(caze.getQName());
1886             caze.getConstraints().getWhenCondition().ifPresent(this::emitWhen);
1887             // FIXME: BUG-2444: *(ifFeatureNode )
1888             emitDocumentedNode(caze);
1889             emitDataNodeContainer(caze);
1890             emitUnknownStatementNodes(caze.getUnknownSchemaNodes());
1891             super.writer.endNode();
1892
1893         }
1894
1895         private void emitAnyxml(final AnyXmlSchemaNode anyxml) {
1896             super.writer.startAnyxmlNode(anyxml.getQName());
1897             emitBodyOfDataSchemaNode(anyxml);
1898             super.writer.endNode();
1899         }
1900
1901         private void emitAnydata(final AnyDataSchemaNode anydata) {
1902             super.writer.startAnydataNode(anydata.getQName());
1903             emitBodyOfDataSchemaNode(anydata);
1904             super.writer.endNode();
1905         }
1906
1907         private void emitBodyOfDataSchemaNode(final DataSchemaNode dataSchemaNode) {
1908             dataSchemaNode.getConstraints().getWhenCondition().ifPresent(this::emitWhen);
1909             // FIXME: BUG-2444: *(ifFeatureNode )
1910             emitMustNodes(dataSchemaNode.getConstraints().getMustConstraints());
1911             emitConfigNode(dataSchemaNode.isConfiguration());
1912             emitMandatoryNode(dataSchemaNode.getConstraints().isMandatory());
1913             emitDocumentedNode(dataSchemaNode);
1914             emitUnknownStatementNodes(dataSchemaNode.getUnknownSchemaNodes());
1915         }
1916
1917         private void emitUsesNode(final UsesNode usesNode) {
1918             if (super.emitUses && !usesNode.isAddedByUses() && !usesNode.isAugmenting()) {
1919                 super.writer.startUsesNode(usesNode.getGroupingPath().getLastComponent());
1920                 /*
1921                  * FIXME: BUG-2444: whenNode / *(ifFeatureNode ) statusNode //
1922                  * Optional F : descriptionNode // Optional referenceNode //
1923                  * Optional
1924                  */
1925                 for (final Entry<SchemaPath, SchemaNode> refine : usesNode.getRefines().entrySet()) {
1926                     emitRefine(refine);
1927                 }
1928                 for (final AugmentationSchemaNode aug : usesNode.getAugmentations()) {
1929                     emitUsesAugmentNode(aug);
1930                 }
1931                 super.writer.endNode();
1932             }
1933         }
1934
1935         private void emitRefine(final Entry<SchemaPath, SchemaNode> refine) {
1936             final SchemaPath path = refine.getKey();
1937             final SchemaNode value = refine.getValue();
1938             super.writer.startRefineNode(path);
1939
1940             if (value instanceof LeafSchemaNode) {
1941                 emitRefineLeafNodes((LeafSchemaNode) value);
1942             } else if (value instanceof LeafListSchemaNode) {
1943                 emitRefineLeafListNodes((LeafListSchemaNode) value);
1944             } else if (value instanceof ListSchemaNode) {
1945                 emitRefineListNodes((ListSchemaNode) value);
1946             } else if (value instanceof ChoiceSchemaNode) {
1947                 emitRefineChoiceNodes((ChoiceSchemaNode) value);
1948             } else if (value instanceof ChoiceCaseNode) {
1949                 emitRefineCaseNodes((ChoiceCaseNode) value);
1950             } else if (value instanceof ContainerSchemaNode) {
1951                 emitRefineContainerNodes((ContainerSchemaNode) value);
1952             } else if (value instanceof AnyXmlSchemaNode) {
1953                 emitRefineAnyxmlNodes((AnyXmlSchemaNode) value);
1954             }
1955             super.writer.endNode();
1956
1957         }
1958
1959         private static <T extends SchemaNode> T getOriginalChecked(final T value) {
1960             final Optional<SchemaNode> original = SchemaNodeUtils.getOriginalIfPossible(value);
1961             Preconditions.checkArgument(original.isPresent(), "Original unmodified version of node is not present.");
1962             @SuppressWarnings("unchecked")
1963             final T ret = (T) original.get();
1964             return ret;
1965         }
1966
1967         private void emitDocumentedNodeRefine(final DocumentedNode original, final DocumentedNode value) {
1968             if (Objects.deepEquals(original.getDescription(), value.getDescription())) {
1969                 value.getDescription().ifPresent(this::emitDescriptionNode);
1970             }
1971             if (Objects.deepEquals(original.getReference(), value.getReference())) {
1972                 value.getReference().ifPresent(this::emitReferenceNode);
1973             }
1974         }
1975
1976         private void emitRefineContainerNodes(final ContainerSchemaNode value) {
1977             final ContainerSchemaNode original = getOriginalChecked(value);
1978
1979             // emitMustNodes(child.getConstraints().getMustConstraints());
1980             if (Objects.deepEquals(original.isPresenceContainer(), value.isPresenceContainer())) {
1981                 emitPresenceNode(value.isPresenceContainer());
1982             }
1983             if (Objects.deepEquals(original.isConfiguration(), value.isConfiguration())) {
1984                 emitConfigNode(value.isConfiguration());
1985             }
1986             emitDocumentedNodeRefine(original, value);
1987
1988         }
1989
1990         private void emitRefineLeafNodes(final LeafSchemaNode value) {
1991             final LeafSchemaNode original = getOriginalChecked(value);
1992
1993             // emitMustNodes(child.getConstraints().getMustConstraints());
1994             if (Objects.deepEquals(original.getType().getDefaultValue(), value.getType().getDefaultValue())) {
1995                 emitDefaultNode(value.getType().getDefaultValue());
1996             }
1997             if (Objects.deepEquals(original.isConfiguration(), value.isConfiguration())) {
1998                 emitConfigNode(value.isConfiguration());
1999             }
2000             emitDocumentedNodeRefine(original, value);
2001             if (Objects.deepEquals(original.getConstraints().isMandatory(), value.getConstraints().isMandatory())) {
2002                 emitMandatoryNode(value.getConstraints().isMandatory());
2003             }
2004
2005         }
2006
2007         private void emitRefineLeafListNodes(final LeafListSchemaNode value) {
2008             final LeafListSchemaNode original = getOriginalChecked(value);
2009
2010             // emitMustNodes(child.getConstraints().getMustConstraints());
2011             if (Objects.deepEquals(original.isConfiguration(), value.isConfiguration())) {
2012                 emitConfigNode(value.isConfiguration());
2013             }
2014             if (Objects.deepEquals(original.getConstraints().getMinElements(),
2015                     value.getConstraints().getMinElements())) {
2016                 emitMinElementsNode(value.getConstraints().getMinElements());
2017             }
2018             if (Objects.deepEquals(original.getConstraints().getMaxElements(),
2019                     value.getConstraints().getMaxElements())) {
2020                 emitMaxElementsNode(value.getConstraints().getMaxElements());
2021             }
2022             emitDocumentedNodeRefine(original, value);
2023
2024         }
2025
2026         private void emitRefineListNodes(final ListSchemaNode value) {
2027             final ListSchemaNode original = getOriginalChecked(value);
2028
2029             // emitMustNodes(child.getConstraints().getMustConstraints());
2030             if (Objects.deepEquals(original.isConfiguration(), value.isConfiguration())) {
2031                 emitConfigNode(value.isConfiguration());
2032             }
2033             if (Objects.deepEquals(original.getConstraints().getMinElements(),
2034                     value.getConstraints().getMinElements())) {
2035                 emitMinElementsNode(value.getConstraints().getMinElements());
2036             }
2037             if (Objects.deepEquals(original.getConstraints().getMaxElements(),
2038                     value.getConstraints().getMaxElements())) {
2039                 emitMaxElementsNode(value.getConstraints().getMaxElements());
2040             }
2041             emitDocumentedNodeRefine(original, value);
2042
2043         }
2044
2045         private void emitRefineChoiceNodes(final ChoiceSchemaNode value) {
2046             final ChoiceSchemaNode original = getOriginalChecked(value);
2047
2048             // FIXME: BUG-2444: defaultNode //FIXME: BUG-2444: Optional
2049             if (Objects.deepEquals(original.isConfiguration(), value.isConfiguration())) {
2050                 emitConfigNode(value.isConfiguration());
2051             }
2052             if (Objects.deepEquals(original.getConstraints().isMandatory(), value.getConstraints().isMandatory())) {
2053                 emitMandatoryNode(value.getConstraints().isMandatory());
2054             }
2055             emitDocumentedNodeRefine(original, value);
2056
2057         }
2058
2059         private void emitRefineCaseNodes(final ChoiceCaseNode value) {
2060             final ChoiceCaseNode original = getOriginalChecked(value);
2061             emitDocumentedNodeRefine(original, value);
2062
2063         }
2064
2065         private void emitRefineAnyxmlNodes(final AnyXmlSchemaNode value) {
2066             final AnyXmlSchemaNode original = getOriginalChecked(value);
2067
2068             // FIXME: BUG-2444:
2069             // emitMustNodes(child.getConstraints().getMustConstraints());
2070             if (Objects.deepEquals(original.isConfiguration(), value.isConfiguration())) {
2071                 emitConfigNode(value.isConfiguration());
2072             }
2073             if (Objects.deepEquals(original.getConstraints().isMandatory(), value.getConstraints().isMandatory())) {
2074                 emitMandatoryNode(value.getConstraints().isMandatory());
2075             }
2076             emitDocumentedNodeRefine(original, value);
2077
2078         }
2079
2080         private void emitUsesAugmentNode(final AugmentationSchemaNode aug) {
2081             /**
2082              * differs only in location in schema, otherwise currently (as of
2083              * RFC6020) it is same, so we could freely reuse path.
2084              */
2085             emitAugment(aug);
2086         }
2087
2088         private void emitAugment(final AugmentationSchemaNode augmentation) {
2089             super.writer.startAugmentNode(augmentation.getTargetPath());
2090             // FIXME: BUG-2444: whenNode //Optional
2091             // FIXME: BUG-2444: *(ifFeatureNode )
2092
2093             emitDocumentedNode(augmentation);
2094             for (final UsesNode uses : augmentation.getUses()) {
2095                 emitUsesNode(uses);
2096             }
2097
2098             for (final DataSchemaNode childNode : augmentation.getChildNodes()) {
2099                 if (childNode instanceof ChoiceCaseNode) {
2100                     emitCaseNode((ChoiceCaseNode) childNode);
2101                 } else {
2102                     emitDataSchemaNode(childNode);
2103                 }
2104             }
2105             emitUnknownStatementNodes(augmentation.getUnknownSchemaNodes());
2106             emitNotifications(augmentation.getNotifications());
2107             emitActions(augmentation.getActions());
2108             super.writer.endNode();
2109         }
2110
2111         private void emitUnknownStatementNodes(final List<UnknownSchemaNode> unknownNodes) {
2112             for (final UnknownSchemaNode unknonwnNode : unknownNodes) {
2113                 if (!unknonwnNode.isAddedByAugmentation() && !unknonwnNode.isAddedByUses()) {
2114                     emitUnknownStatementNode(unknonwnNode);
2115                 }
2116             }
2117         }
2118
2119         private void emitUnknownStatementNode(final UnknownSchemaNode node) {
2120             final StatementDefinition def = getStatementChecked(node.getNodeType());
2121             if (def.getArgumentName() == null) {
2122                 super.writer.startUnknownNode(def);
2123             } else {
2124                 super.writer.startUnknownNode(def, node.getNodeParameter());
2125             }
2126             emitUnknownStatementNodes(node.getUnknownSchemaNodes());
2127             super.writer.endNode();
2128         }
2129
2130         private StatementDefinition getStatementChecked(final QName nodeType) {
2131             final StatementDefinition ret = super.extensions.get(nodeType);
2132             Preconditions.checkArgument(ret != null, "Unknown extension %s used during export.", nodeType);
2133             return ret;
2134         }
2135
2136         private void emitWhen(final RevisionAwareXPath revisionAwareXPath) {
2137             if (revisionAwareXPath != null) {
2138                 super.writer.startWhenNode(revisionAwareXPath);
2139                 super.writer.endNode();
2140             }
2141             // FIXME: BUG-2444: descriptionNode //FIXME: BUG-2444: Optional
2142             // FIXME: BUG-2444: referenceNode //FIXME: BUG-2444: Optional
2143             // FIXME: BUG-2444: super.writer.endNode();)
2144
2145         }
2146
2147         private void emitRpc(final RpcDefinition rpc) {
2148             super.writer.startRpcNode(rpc.getQName());
2149             emitOperationBody(rpc);
2150             super.writer.endNode();
2151         }
2152
2153         private void emitOperationBody(final OperationDefinition rpc) {
2154             // FIXME: BUG-2444: *(ifFeatureNode )
2155             emitDocumentedNode(rpc);
2156
2157             for (final TypeDefinition<?> typedef : rpc.getTypeDefinitions()) {
2158                 emitTypedefNode(typedef);
2159             }
2160             for (final GroupingDefinition grouping : rpc.getGroupings()) {
2161                 emitGrouping(grouping);
2162             }
2163             emitInput(rpc.getInput());
2164             emitOutput(rpc.getOutput());
2165             emitUnknownStatementNodes(rpc.getUnknownSchemaNodes());
2166         }
2167
2168         private void emitActions(final Set<ActionDefinition> actions) {
2169             for (final ActionDefinition actionDefinition : actions) {
2170                 emitAction(actionDefinition);
2171             }
2172         }
2173
2174         private void emitAction(final ActionDefinition action) {
2175             if (!super.emitInstantiated && (action.isAddedByUses() || action.isAugmenting())) {
2176                 // We skip instantiated nodes.
2177                 return;
2178             }
2179             super.writer.startActionNode(action.getQName());
2180             emitOperationBody(action);
2181             super.writer.endNode();
2182         }
2183
2184         private void emitInput(@Nonnull final ContainerSchemaNode input) {
2185             if (isExplicitStatement(input)) {
2186                 super.writer.startInputNode();
2187                 emitConstraints(input.getConstraints());
2188                 emitDataNodeContainer(input);
2189                 emitUnknownStatementNodes(input.getUnknownSchemaNodes());
2190                 super.writer.endNode();
2191             }
2192
2193         }
2194
2195         private void emitOutput(@Nonnull final ContainerSchemaNode output) {
2196             if (isExplicitStatement(output)) {
2197                 super.writer.startOutputNode();
2198                 emitConstraints(output.getConstraints());
2199                 emitDataNodeContainer(output);
2200                 emitUnknownStatementNodes(output.getUnknownSchemaNodes());
2201                 super.writer.endNode();
2202             }
2203         }
2204
2205         private static boolean isExplicitStatement(final ContainerSchemaNode node) {
2206             return node instanceof EffectiveStatement && ((EffectiveStatement<?, ?>) node).getDeclared()
2207                     .getStatementSource() == StatementSource.DECLARATION;
2208         }
2209
2210         private void emitNotifications(final Set<NotificationDefinition> notifications) {
2211             for (final NotificationDefinition notification : notifications) {
2212                 emitNotificationNode(notification);
2213             }
2214         }
2215
2216         private void emitNotificationNode(final NotificationDefinition notification) {
2217             if (!super.emitInstantiated && (notification.isAddedByUses() || notification.isAugmenting())) {
2218                 // We skip instantiated nodes.
2219                 return;
2220             }
2221
2222             super.writer.startNotificationNode(notification.getQName());
2223             // FIXME: BUG-2444: *(ifFeatureNode )
2224             for (final MustDefinition mustCondition : notification.getMustConstraints()) {
2225                 emitMust(mustCondition);
2226             }
2227             emitDocumentedNode(notification);
2228             emitDataNodeContainer(notification);
2229             emitUnknownStatementNodes(notification.getUnknownSchemaNodes());
2230             super.writer.endNode();
2231
2232         }
2233
2234         private void emitDeviation(final Deviation deviation) {
2235             /*
2236              * FIXME: BUG-2444: Deviation is not modeled properly and we are
2237              * loosing lot of information in order to export it properly
2238              *
2239              * super.writer.startDeviationNode(deviation.getTargetPath());
2240              *
2241              * :descriptionNode //:Optional
2242              *
2243              *
2244              * emitReferenceNode(deviation.getReference());
2245              * :(deviateNotSupportedNode :1*(deviateAddNode :deviateReplaceNode
2246              * :deviateDeleteNode)) :super.writer.endNode();
2247              */
2248         }
2249     }
2250 }