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