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