2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.yangtools.yang.parser.stmt.reactor;
10 import static com.google.common.base.Preconditions.checkState;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.Verify;
14 import com.google.common.collect.HashBasedTable;
15 import com.google.common.collect.ImmutableMap;
16 import com.google.common.collect.ImmutableSet;
17 import com.google.common.collect.ImmutableSetMultimap;
18 import com.google.common.collect.SetMultimap;
19 import com.google.common.collect.Table;
20 import com.google.common.collect.TreeBasedTable;
21 import java.util.ArrayList;
22 import java.util.Collection;
23 import java.util.HashMap;
24 import java.util.HashSet;
25 import java.util.Iterator;
26 import java.util.List;
28 import java.util.Objects;
29 import java.util.Optional;
31 import java.util.SortedMap;
32 import org.eclipse.jdt.annotation.NonNull;
33 import org.opendaylight.yangtools.util.RecursiveObjectLeaker;
34 import org.opendaylight.yangtools.yang.common.QName;
35 import org.opendaylight.yangtools.yang.common.QNameModule;
36 import org.opendaylight.yangtools.yang.common.Revision;
37 import org.opendaylight.yangtools.yang.common.YangVersion;
38 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
39 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
40 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
41 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
42 import org.opendaylight.yangtools.yang.model.repo.api.StatementParserMode;
43 import org.opendaylight.yangtools.yang.parser.spi.meta.DerivedNamespaceBehaviour;
44 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
45 import org.opendaylight.yangtools.yang.parser.spi.meta.MutableStatement;
46 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour;
47 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.NamespaceStorageNode;
48 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.Registry;
49 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.StorageNodeType;
50 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceNotAvailableException;
51 import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
52 import org.opendaylight.yangtools.yang.parser.spi.meta.SomeModifiersUnresolvedException;
53 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport;
54 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupportBundle;
55 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
56 import org.opendaylight.yangtools.yang.parser.spi.source.ModulesDeviatedByModules;
57 import org.opendaylight.yangtools.yang.parser.spi.source.ModulesDeviatedByModules.SupportedModules;
58 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
59 import org.opendaylight.yangtools.yang.parser.spi.source.StatementStreamSource;
60 import org.opendaylight.yangtools.yang.parser.spi.source.SupportedFeaturesNamespace;
61 import org.opendaylight.yangtools.yang.parser.spi.source.SupportedFeaturesNamespace.SupportedFeatures;
62 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
63 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
64 import org.opendaylight.yangtools.yang.parser.stmt.reactor.SourceSpecificContext.PhaseCompletionProgress;
65 import org.slf4j.Logger;
66 import org.slf4j.LoggerFactory;
68 class BuildGlobalContext extends NamespaceStorageSupport implements Registry {
69 private static final Logger LOG = LoggerFactory.getLogger(BuildGlobalContext.class);
71 private static final ModelProcessingPhase[] PHASE_EXECUTION_ORDER = {
72 ModelProcessingPhase.SOURCE_PRE_LINKAGE,
73 ModelProcessingPhase.SOURCE_LINKAGE,
74 ModelProcessingPhase.STATEMENT_DEFINITION,
75 ModelProcessingPhase.FULL_DECLARATION,
76 ModelProcessingPhase.EFFECTIVE_MODEL
79 private final Table<YangVersion, QName, StatementDefinitionContext<?, ?, ?>> definitions = HashBasedTable.create();
80 private final Map<QName, StatementDefinitionContext<?, ?, ?>> modelDefinedStmtDefs = new HashMap<>();
81 private final Map<Class<?>, NamespaceBehaviourWithListeners<?, ?, ?>> supportedNamespaces = new HashMap<>();
82 private final List<MutableStatement> mutableStatementsToSeal = new ArrayList<>();
83 private final ImmutableMap<ModelProcessingPhase, StatementSupportBundle> supports;
84 private final Set<SourceSpecificContext> sources = new HashSet<>();
85 private final ImmutableSet<YangVersion> supportedVersions;
86 private final boolean enabledSemanticVersions;
88 private Set<SourceSpecificContext> libSources = new HashSet<>();
89 private ModelProcessingPhase currentPhase = ModelProcessingPhase.INIT;
90 private ModelProcessingPhase finishedPhase = ModelProcessingPhase.INIT;
92 BuildGlobalContext(final ImmutableMap<ModelProcessingPhase, StatementSupportBundle> supports,
93 final ImmutableMap<ValidationBundleType, Collection<?>> supportedValidation,
94 final StatementParserMode statementParserMode) {
95 this.supports = requireNonNull(supports, "BuildGlobalContext#supports cannot be null");
97 switch (statementParserMode) {
99 enabledSemanticVersions = false;
102 enabledSemanticVersions = true;
105 throw new IllegalArgumentException("Unhandled parser mode " + statementParserMode);
108 addToNamespace(ValidationBundlesNamespace.class, supportedValidation);
110 this.supportedVersions = ImmutableSet.copyOf(supports.get(ModelProcessingPhase.INIT).getSupportedVersions());
113 boolean isEnabledSemanticVersioning() {
114 return enabledSemanticVersions;
117 StatementSupportBundle getSupportsForPhase(final ModelProcessingPhase phase) {
118 return supports.get(phase);
121 void addSource(final @NonNull StatementStreamSource source) {
122 sources.add(new SourceSpecificContext(this, source));
125 void addLibSource(final @NonNull StatementStreamSource libSource) {
126 checkState(!isEnabledSemanticVersioning(),
127 "Library sources are not supported in semantic version mode currently.");
128 checkState(currentPhase == ModelProcessingPhase.INIT,
129 "Add library source is allowed in ModelProcessingPhase.INIT only");
130 libSources.add(new SourceSpecificContext(this, libSource));
133 void setSupportedFeatures(final Set<QName> supportedFeatures) {
134 addToNamespace(SupportedFeaturesNamespace.class, SupportedFeatures.SUPPORTED_FEATURES,
135 ImmutableSet.copyOf(supportedFeatures));
138 void setModulesDeviatedByModules(final SetMultimap<QNameModule, QNameModule> modulesDeviatedByModules) {
139 addToNamespace(ModulesDeviatedByModules.class, SupportedModules.SUPPORTED_MODULES,
140 ImmutableSetMultimap.copyOf(modulesDeviatedByModules));
144 public StorageNodeType getStorageNodeType() {
145 return StorageNodeType.GLOBAL;
149 public NamespaceStorageNode getParentNamespaceStorage() {
154 public NamespaceBehaviour.Registry getBehaviourRegistry() {
159 public <K, V, N extends IdentifierNamespace<K, V>> NamespaceBehaviourWithListeners<K, V, N> getNamespaceBehaviour(
160 final Class<N> type) {
161 NamespaceBehaviourWithListeners<?, ?, ?> potential = supportedNamespaces.get(type);
162 if (potential == null) {
163 final NamespaceBehaviour<K, V, N> potentialRaw = supports.get(currentPhase).getNamespaceBehaviour(type);
164 if (potentialRaw != null) {
165 potential = createNamespaceContext(potentialRaw);
166 supportedNamespaces.put(type, potential);
168 throw new NamespaceNotAvailableException("Namespace " + type + " is not available in phase "
173 Verify.verify(type.equals(potential.getIdentifier()));
175 * Safe cast, previous checkState checks equivalence of key from which
176 * type argument are derived
178 return (NamespaceBehaviourWithListeners<K, V, N>) potential;
181 @SuppressWarnings({ "unchecked", "rawtypes" })
182 private <K, V, N extends IdentifierNamespace<K, V>> NamespaceBehaviourWithListeners<K, V, N> createNamespaceContext(
183 final NamespaceBehaviour<K, V, N> potentialRaw) {
184 if (potentialRaw instanceof DerivedNamespaceBehaviour) {
185 final VirtualNamespaceContext derivedContext = new VirtualNamespaceContext(
186 (DerivedNamespaceBehaviour) potentialRaw);
187 getNamespaceBehaviour(((DerivedNamespaceBehaviour) potentialRaw).getDerivedFrom()).addDerivedNamespace(
189 return derivedContext;
191 return new SimpleNamespaceContext<>(potentialRaw);
194 StatementDefinitionContext<?, ?, ?> getStatementDefinition(final YangVersion version, final QName name) {
195 StatementDefinitionContext<?, ?, ?> potential = definitions.get(version, name);
196 if (potential == null) {
197 final StatementSupport<?, ?, ?> potentialRaw = supports.get(currentPhase).getStatementDefinition(version,
199 if (potentialRaw != null) {
200 potential = new StatementDefinitionContext<>(potentialRaw);
201 definitions.put(version, name, potential);
207 StatementDefinitionContext<?, ?, ?> getModelDefinedStatementDefinition(final QName name) {
208 return modelDefinedStmtDefs.get(name);
211 void putModelDefinedStatementDefinition(final QName name, final StatementDefinitionContext<?, ?, ?> def) {
212 modelDefinedStmtDefs.put(name, def);
215 private void executePhases() throws ReactorException {
216 for (final ModelProcessingPhase phase : PHASE_EXECUTION_ORDER) {
218 loadPhaseStatements();
219 completePhaseActions();
224 ReactorDeclaredModel build() throws ReactorException {
229 EffectiveSchemaContext buildEffective() throws ReactorException {
231 return transformEffective();
234 private ReactorDeclaredModel transform() {
235 checkState(finishedPhase == ModelProcessingPhase.EFFECTIVE_MODEL);
236 final List<DeclaredStatement<?>> rootStatements = new ArrayList<>(sources.size());
237 for (final SourceSpecificContext source : sources) {
238 rootStatements.add(source.getRoot().buildDeclared());
240 return new ReactorDeclaredModel(rootStatements);
243 private SomeModifiersUnresolvedException propagateException(final SourceSpecificContext source,
244 final RuntimeException cause) throws SomeModifiersUnresolvedException {
245 final SourceIdentifier sourceId = StmtContextUtils.createSourceIdentifier(source.getRoot());
246 if (!(cause instanceof SourceException)) {
248 * This should not be happening as all our processing should provide SourceExceptions.
249 * We will wrap the exception to provide enough information to identify the problematic model,
250 * but also emit a warning so the offending codepath will get fixed.
252 LOG.warn("Unexpected error processing source {}. Please file an issue with this model attached.",
256 throw new SomeModifiersUnresolvedException(currentPhase, sourceId, cause);
259 @SuppressWarnings("checkstyle:illegalCatch")
260 private EffectiveSchemaContext transformEffective() throws ReactorException {
261 checkState(finishedPhase == ModelProcessingPhase.EFFECTIVE_MODEL);
262 final List<DeclaredStatement<?>> rootStatements = new ArrayList<>(sources.size());
263 final List<EffectiveStatement<?, ?>> rootEffectiveStatements = new ArrayList<>(sources.size());
266 for (final SourceSpecificContext source : sources) {
267 final RootStatementContext<?, ?, ?> root = source.getRoot();
269 rootStatements.add(root.buildDeclared());
270 rootEffectiveStatements.add(root.buildEffective());
271 } catch (final RuntimeException ex) {
272 throw propagateException(source, ex);
276 RecursiveObjectLeaker.cleanup();
279 sealMutableStatements();
280 return EffectiveSchemaContext.create(rootStatements, rootEffectiveStatements);
283 private void startPhase(final ModelProcessingPhase phase) {
284 checkState(Objects.equals(finishedPhase, phase.getPreviousPhase()));
285 startPhaseFor(phase, sources);
286 startPhaseFor(phase, libSources);
288 currentPhase = phase;
289 LOG.debug("Global phase {} started", phase);
292 private static void startPhaseFor(final ModelProcessingPhase phase, final Set<SourceSpecificContext> sources) {
293 for (final SourceSpecificContext source : sources) {
294 source.startPhase(phase);
298 private void loadPhaseStatements() throws ReactorException {
299 checkState(currentPhase != null);
300 loadPhaseStatementsFor(sources);
301 loadPhaseStatementsFor(libSources);
304 @SuppressWarnings("checkstyle:illegalCatch")
305 private void loadPhaseStatementsFor(final Set<SourceSpecificContext> srcs) throws ReactorException {
306 for (final SourceSpecificContext source : srcs) {
308 source.loadStatements();
309 } catch (final RuntimeException ex) {
310 throw propagateException(source, ex);
315 private SomeModifiersUnresolvedException addSourceExceptions(final List<SourceSpecificContext> sourcesToProgress) {
316 boolean addedCause = false;
317 SomeModifiersUnresolvedException buildFailure = null;
318 for (final SourceSpecificContext failedSource : sourcesToProgress) {
319 final Optional<SourceException> optSourceEx = failedSource.failModifiers(currentPhase);
320 if (optSourceEx.isEmpty()) {
324 final SourceException sourceEx = optSourceEx.get();
325 // Workaround for broken logging implementations which ignore
326 // suppressed exceptions
327 final Throwable cause = sourceEx.getCause() != null ? sourceEx.getCause() : sourceEx;
328 if (LOG.isDebugEnabled()) {
329 LOG.error("Failed to parse YANG from source {}", failedSource, sourceEx);
331 LOG.error("Failed to parse YANG from source {}: {}", failedSource, cause.getMessage());
334 final Throwable[] suppressed = sourceEx.getSuppressed();
335 if (suppressed.length > 0) {
336 LOG.error("{} additional errors reported:", suppressed.length);
339 for (final Throwable t : suppressed) {
340 LOG.error("Error {}: {}", count, t.getMessage());
347 final SourceIdentifier sourceId = StmtContextUtils.createSourceIdentifier(failedSource.getRoot());
348 buildFailure = new SomeModifiersUnresolvedException(currentPhase, sourceId, sourceEx);
350 buildFailure.addSuppressed(sourceEx);
356 @SuppressWarnings("checkstyle:illegalCatch")
357 private void completePhaseActions() throws ReactorException {
358 checkState(currentPhase != null);
359 final List<SourceSpecificContext> sourcesToProgress = new ArrayList<>(sources);
360 if (!libSources.isEmpty()) {
361 checkState(currentPhase == ModelProcessingPhase.SOURCE_PRE_LINKAGE,
362 "Yang library sources should be empty after ModelProcessingPhase.SOURCE_PRE_LINKAGE, "
363 + "but current phase was %s", currentPhase);
364 sourcesToProgress.addAll(libSources);
367 boolean progressing = true;
368 while (progressing) {
369 // We reset progressing to false.
371 final Iterator<SourceSpecificContext> currentSource = sourcesToProgress.iterator();
372 while (currentSource.hasNext()) {
373 final SourceSpecificContext nextSourceCtx = currentSource.next();
375 final PhaseCompletionProgress sourceProgress = nextSourceCtx.tryToCompletePhase(currentPhase);
376 switch (sourceProgress) {
378 currentSource.remove();
379 // we were able to make progress in computation
389 throw new IllegalStateException("Unsupported phase progress " + sourceProgress);
391 } catch (final RuntimeException ex) {
392 throw propagateException(nextSourceCtx, ex);
397 if (!libSources.isEmpty()) {
398 final Set<SourceSpecificContext> requiredLibs = getRequiredSourcesFromLib();
399 sources.addAll(requiredLibs);
400 libSources = ImmutableSet.of();
402 * We want to report errors of relevant sources only, so any others can
405 sourcesToProgress.retainAll(sources);
408 if (!sourcesToProgress.isEmpty()) {
409 final SomeModifiersUnresolvedException buildFailure = addSourceExceptions(sourcesToProgress);
410 if (buildFailure != null) {
416 private Set<SourceSpecificContext> getRequiredSourcesFromLib() {
417 checkState(currentPhase == ModelProcessingPhase.SOURCE_PRE_LINKAGE,
418 "Required library sources can be collected only in ModelProcessingPhase.SOURCE_PRE_LINKAGE phase,"
419 + " but current phase was %s", currentPhase);
420 final TreeBasedTable<String, Optional<Revision>, SourceSpecificContext> libSourcesTable = TreeBasedTable.create(
421 String::compareTo, Revision::compare);
422 for (final SourceSpecificContext libSource : libSources) {
423 final SourceIdentifier libSourceIdentifier = requireNonNull(libSource.getRootIdentifier());
424 libSourcesTable.put(libSourceIdentifier.getName(), libSourceIdentifier.getRevision(), libSource);
427 final Set<SourceSpecificContext> requiredLibs = new HashSet<>();
428 for (final SourceSpecificContext source : sources) {
429 collectRequiredSourcesFromLib(libSourcesTable, requiredLibs, source);
430 removeConflictingLibSources(source, requiredLibs);
435 private void collectRequiredSourcesFromLib(
436 final TreeBasedTable<String, Optional<Revision>, SourceSpecificContext> libSourcesTable,
437 final Set<SourceSpecificContext> requiredLibs, final SourceSpecificContext source) {
438 for (final SourceIdentifier requiredSource : source.getRequiredSources()) {
439 final SourceSpecificContext libSource = getRequiredLibSource(requiredSource, libSourcesTable);
440 if (libSource != null && requiredLibs.add(libSource)) {
441 collectRequiredSourcesFromLib(libSourcesTable, requiredLibs, libSource);
446 private static SourceSpecificContext getRequiredLibSource(final SourceIdentifier requiredSource,
447 final TreeBasedTable<String, Optional<Revision>, SourceSpecificContext> libSourcesTable) {
448 return requiredSource.getRevision().isPresent()
449 ? libSourcesTable.get(requiredSource.getName(), requiredSource.getRevision())
450 : getLatestRevision(libSourcesTable.row(requiredSource.getName()));
453 private static SourceSpecificContext getLatestRevision(final SortedMap<Optional<Revision>,
454 SourceSpecificContext> sourceMap) {
455 return sourceMap != null && !sourceMap.isEmpty() ? sourceMap.get(sourceMap.lastKey()) : null;
458 // removes required library sources which would cause namespace/name conflict with one of the main sources
459 // later in the parsing process. this can happen if we add a parent module or a submodule as a main source
460 // and the same parent module or submodule is added as one of the library sources.
461 // such situation may occur when using the yang-system-test artifact - if a parent module/submodule is specified
462 // as its argument and the same dir is specified as one of the library dirs through -p option).
463 private static void removeConflictingLibSources(final SourceSpecificContext source,
464 final Set<SourceSpecificContext> requiredLibs) {
465 final Iterator<SourceSpecificContext> requiredLibsIter = requiredLibs.iterator();
466 while (requiredLibsIter.hasNext()) {
467 final SourceSpecificContext currentReqSource = requiredLibsIter.next();
468 if (source.getRootIdentifier().equals(currentReqSource.getRootIdentifier())) {
469 requiredLibsIter.remove();
474 private void endPhase(final ModelProcessingPhase phase) {
475 checkState(currentPhase == phase);
476 finishedPhase = currentPhase;
477 LOG.debug("Global phase {} finished", phase);
480 Set<SourceSpecificContext> getSources() {
484 public Set<YangVersion> getSupportedVersions() {
485 return supportedVersions;
488 void addMutableStmtToSeal(final MutableStatement mutableStatement) {
489 mutableStatementsToSeal.add(mutableStatement);
492 void sealMutableStatements() {
493 for (final MutableStatement mutableStatement : mutableStatementsToSeal) {
494 mutableStatement.seal();
496 mutableStatementsToSeal.clear();