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.checkArgument;
11 import static com.google.common.base.Preconditions.checkNotNull;
12 import static com.google.common.base.Preconditions.checkState;
13 import static com.google.common.base.Verify.verify;
14 import static java.util.Objects.requireNonNull;
16 import com.google.common.annotations.Beta;
17 import com.google.common.base.MoreObjects;
18 import com.google.common.base.MoreObjects.ToStringHelper;
19 import com.google.common.collect.ImmutableCollection;
20 import com.google.common.collect.ImmutableList;
21 import com.google.common.collect.ImmutableMultimap;
22 import com.google.common.collect.Multimap;
23 import com.google.common.collect.Multimaps;
24 import java.util.ArrayList;
25 import java.util.Collection;
26 import java.util.Collections;
27 import java.util.EnumMap;
28 import java.util.EventListener;
29 import java.util.Iterator;
30 import java.util.List;
32 import java.util.Map.Entry;
33 import java.util.Optional;
35 import org.eclipse.jdt.annotation.NonNull;
36 import org.eclipse.jdt.annotation.Nullable;
37 import org.opendaylight.yangtools.yang.common.QName;
38 import org.opendaylight.yangtools.yang.common.QNameModule;
39 import org.opendaylight.yangtools.yang.common.YangVersion;
40 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
41 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
42 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
43 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
44 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
45 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
46 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
47 import org.opendaylight.yangtools.yang.model.api.stmt.ConfigStatement;
48 import org.opendaylight.yangtools.yang.model.api.stmt.DeviationStatement;
49 import org.opendaylight.yangtools.yang.model.api.stmt.RefineStatement;
50 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
51 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
52 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
53 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyHistory;
54 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
55 import org.opendaylight.yangtools.yang.parser.spi.meta.ImplicitParentAwareStatementSupport;
56 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
57 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
58 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
59 import org.opendaylight.yangtools.yang.parser.spi.meta.MutableStatement;
60 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour;
61 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.Registry;
62 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceKeyCriterion;
63 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceNotAvailableException;
64 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementNamespace;
65 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport;
66 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport.CopyPolicy;
67 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
68 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
69 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
70 import org.opendaylight.yangtools.yang.parser.spi.source.ImplicitSubstatement;
71 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
72 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
73 import org.opendaylight.yangtools.yang.parser.spi.source.SupportedFeaturesNamespace;
74 import org.opendaylight.yangtools.yang.parser.spi.source.SupportedFeaturesNamespace.SupportedFeatures;
75 import org.opendaylight.yangtools.yang.parser.stmt.reactor.NamespaceBehaviourWithListeners.KeyedValueAddedListener;
76 import org.opendaylight.yangtools.yang.parser.stmt.reactor.NamespaceBehaviourWithListeners.PredicateValueAddedListener;
77 import org.slf4j.Logger;
78 import org.slf4j.LoggerFactory;
81 * Core reactor statement implementation of {@link Mutable}.
83 * @param <A> Argument type
84 * @param <D> Declared Statement representation
85 * @param <E> Effective Statement representation
87 public abstract class StatementContextBase<A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>>
88 extends NamespaceStorageSupport implements Mutable<A, D, E> {
90 * Event listener when an item is added to model namespace.
92 interface OnNamespaceItemAdded extends EventListener {
94 * Invoked whenever a new item is added to a namespace.
96 void namespaceItemAdded(StatementContextBase<?, ?, ?> context, Class<?> namespace, Object key, Object value);
100 * Event listener when a parsing {@link ModelProcessingPhase} is completed.
102 interface OnPhaseFinished extends EventListener {
104 * Invoked whenever a processing phase has finished.
106 boolean phaseFinished(StatementContextBase<?, ?, ?> context, ModelProcessingPhase finishedPhase);
110 * Interface for all mutations within an {@link ModelActionBuilder.InferenceAction}.
112 interface ContextMutation {
114 boolean isFinished();
117 private static final Logger LOG = LoggerFactory.getLogger(StatementContextBase.class);
119 // Flag bit assignments
120 private static final int IS_SUPPORTED_BY_FEATURES = 0x01;
121 private static final int HAVE_SUPPORTED_BY_FEATURES = 0x02;
122 private static final int IS_IGNORE_IF_FEATURE = 0x04;
123 private static final int HAVE_IGNORE_IF_FEATURE = 0x08;
124 // Note: these four are related
125 private static final int IS_IGNORE_CONFIG = 0x10;
126 private static final int HAVE_IGNORE_CONFIG = 0x20;
127 private static final int IS_CONFIGURATION = 0x40;
128 private static final int HAVE_CONFIGURATION = 0x80;
130 // Have-and-set flag constants, also used as masks
131 private static final int SET_SUPPORTED_BY_FEATURES = HAVE_SUPPORTED_BY_FEATURES | IS_SUPPORTED_BY_FEATURES;
132 private static final int SET_CONFIGURATION = HAVE_CONFIGURATION | IS_CONFIGURATION;
133 // Note: implies SET_CONFIGURATION, allowing fewer bit operations to be performed
134 private static final int SET_IGNORE_CONFIG = HAVE_IGNORE_CONFIG | IS_IGNORE_CONFIG | SET_CONFIGURATION;
135 private static final int SET_IGNORE_IF_FEATURE = HAVE_IGNORE_IF_FEATURE | IS_IGNORE_IF_FEATURE;
137 private final CopyHistory copyHistory;
138 // Note: this field can strictly be derived in InferredStatementContext, but it forms the basis of many of our
139 // operations, hence we want to keep it close by.
140 private final @NonNull StatementDefinitionContext<A, D, E> definition;
142 private Multimap<ModelProcessingPhase, OnPhaseFinished> phaseListeners = ImmutableMultimap.of();
143 private Multimap<ModelProcessingPhase, ContextMutation> phaseMutation = ImmutableMultimap.of();
144 private List<StatementContextBase<?, ?, ?>> effective = ImmutableList.of();
145 private List<StmtContext<?, ?, ?>> effectOfStatement = ImmutableList.of();
147 private @Nullable ModelProcessingPhase completedPhase;
148 private @Nullable E effectiveInstance;
150 // Master flag controlling whether this context can yield an effective statement
151 // FIXME: investigate the mechanics that are being supported by this, as it would be beneficial if we can get rid
152 // of this flag -- eliminating the initial alignment shadow used by below gap-filler fields.
153 private boolean isSupportedToBuildEffective = true;
155 // Flag for use with AbstractResumedStatement. This is hiding in the alignment shadow created by above boolean
156 private boolean fullyDefined;
158 // Flags for use with SubstatementContext. These are hiding in the alignment shadow created by above boolean and
159 // hence improve memory layout.
162 // SchemaPath cache for use with SubstatementContext and InferredStatementContext. This hurts RootStatementContext
163 // a bit in terms of size -- but those are only a few and SchemaPath is on its way out anyway.
164 private volatile SchemaPath schemaPath;
166 // Copy constructor used by subclasses to implement reparent()
167 StatementContextBase(final StatementContextBase<A, D, E> original) {
168 this.copyHistory = original.copyHistory;
169 this.definition = original.definition;
171 this.isSupportedToBuildEffective = original.isSupportedToBuildEffective;
172 this.fullyDefined = original.fullyDefined;
173 this.completedPhase = original.completedPhase;
174 this.flags = original.flags;
177 StatementContextBase(final StatementDefinitionContext<A, D, E> def) {
178 this.definition = requireNonNull(def);
179 this.copyHistory = CopyHistory.original();
182 StatementContextBase(final StatementDefinitionContext<A, D, E> def, final CopyHistory copyHistory) {
183 this.definition = requireNonNull(def);
184 this.copyHistory = requireNonNull(copyHistory);
188 public Collection<? extends StmtContext<?, ?, ?>> getEffectOfStatement() {
189 return effectOfStatement;
193 public void addAsEffectOfStatement(final StmtContext<?, ?, ?> ctx) {
194 if (effectOfStatement.isEmpty()) {
195 effectOfStatement = new ArrayList<>(1);
197 effectOfStatement.add(ctx);
201 public void addAsEffectOfStatement(final Collection<? extends StmtContext<?, ?, ?>> ctxs) {
202 if (ctxs.isEmpty()) {
206 if (effectOfStatement.isEmpty()) {
207 effectOfStatement = new ArrayList<>(ctxs.size());
209 effectOfStatement.addAll(ctxs);
213 public boolean isSupportedByFeatures() {
214 final int fl = flags & SET_SUPPORTED_BY_FEATURES;
216 return fl == SET_SUPPORTED_BY_FEATURES;
218 if (isIgnoringIfFeatures()) {
219 flags |= SET_SUPPORTED_BY_FEATURES;
224 * If parent is supported, we need to check if-features statements of this context.
226 if (isParentSupportedByFeatures()) {
227 // If the set of supported features has not been provided, all features are supported by default.
228 final Set<QName> supportedFeatures = getFromNamespace(SupportedFeaturesNamespace.class,
229 SupportedFeatures.SUPPORTED_FEATURES);
230 if (supportedFeatures == null || StmtContextUtils.checkFeatureSupport(this, supportedFeatures)) {
231 flags |= SET_SUPPORTED_BY_FEATURES;
236 // Either parent is not supported or this statement is not supported
237 flags |= HAVE_SUPPORTED_BY_FEATURES;
241 protected abstract boolean isParentSupportedByFeatures();
244 public boolean isSupportedToBuildEffective() {
245 return isSupportedToBuildEffective;
249 public void setIsSupportedToBuildEffective(final boolean isSupportedToBuildEffective) {
250 this.isSupportedToBuildEffective = isSupportedToBuildEffective;
254 public CopyHistory getCopyHistory() {
259 public ModelProcessingPhase getCompletedPhase() {
260 return completedPhase;
264 public void setCompletedPhase(final ModelProcessingPhase completedPhase) {
265 this.completedPhase = completedPhase;
269 public abstract StatementContextBase<?, ?, ?> getParentContext();
272 * Returns the model root for this statement.
274 * @return root context of statement
277 public abstract RootStatementContext<?, ?, ?> getRoot();
280 public final @NonNull Registry getBehaviourRegistry() {
281 return getRoot().getBehaviourRegistryImpl();
285 public final YangVersion getRootVersion() {
286 return getRoot().getRootVersionImpl();
290 public final void setRootVersion(final YangVersion version) {
291 getRoot().setRootVersionImpl(version);
295 public final void addMutableStmtToSeal(final MutableStatement mutableStatement) {
296 getRoot().addMutableStmtToSealImpl(mutableStatement);
300 public final void addRequiredSource(final SourceIdentifier dependency) {
301 getRoot().addRequiredSourceImpl(dependency);
305 public final void setRootIdentifier(final SourceIdentifier identifier) {
306 getRoot().setRootIdentifierImpl(identifier);
310 public final boolean isEnabledSemanticVersioning() {
311 return getRoot().isEnabledSemanticVersioningImpl();
315 public StatementSource getStatementSource() {
316 return getStatementSourceReference().getStatementSource();
320 public final <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAllFromCurrentStmtCtxNamespace(
321 final Class<N> type) {
322 return getLocalNamespace(type);
326 public final <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAllFromNamespace(final Class<N> type) {
327 return getNamespace(type);
331 * Associate a value with a key within a namespace.
333 * @param type Namespace type
336 * @param <K> namespace key type
337 * @param <V> namespace value type
338 * @param <N> namespace type
339 * @param <T> key type
340 * @param <U> value type
341 * @throws NamespaceNotAvailableException when the namespace is not available.
344 public final <K, V, T extends K, U extends V, N extends IdentifierNamespace<K, V>> void addToNs(
345 final Class<N> type, final T key, final U value) {
346 addToNamespace(type, key, value);
350 public abstract Collection<? extends StatementContextBase<?, ?, ?>> mutableDeclaredSubstatements();
353 * Return a value associated with specified key within a namespace.
355 * @param type Namespace type
357 * @param <K> namespace key type
358 * @param <V> namespace value type
359 * @param <N> namespace type
360 * @param <T> key type
361 * @return Value, or null if there is no element
362 * @throws NamespaceNotAvailableException when the namespace is not available.
365 public final <K, V, T extends K, N extends IdentifierNamespace<K, V>> V getFromNamespace(final Class<N> type,
367 return getBehaviourRegistry().getNamespaceBehaviour(type).getFrom(this, key);
371 public Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements() {
372 if (effective instanceof ImmutableCollection) {
376 return Collections.unmodifiableCollection(effective);
380 * Remove a set of statements from effective statements.
382 * @param statements statements to be removed
383 * @deprecated This method was used by EffectiveStatementBase to restore proper order of effects of uses statements.
384 * It is no longer used in that capacity and slated for removal.
386 // FIXME: 5.0.0: remove this method
387 @Deprecated(forRemoval = true)
388 public void removeStatementsFromEffectiveSubstatements(
389 final Collection<? extends StmtContext<?, ?, ?>> statements) {
390 if (!effective.isEmpty()) {
391 effective.removeAll(statements);
396 private void shrinkEffective() {
397 if (effective.isEmpty()) {
398 effective = ImmutableList.of();
402 public void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef) {
403 if (effective.isEmpty()) {
407 final Iterator<? extends StmtContext<?, ?, ?>> iterator = effective.iterator();
408 while (iterator.hasNext()) {
409 final StmtContext<?, ?, ?> next = iterator.next();
410 if (statementDef.equals(next.getPublicDefinition())) {
419 * Removes a statement context from the effective substatements based on its statement definition (i.e statement
420 * keyword) and raw (in String form) statement argument. The statement context is removed only if both statement
421 * definition and statement argument match with one of the effective substatements' statement definition
425 * If the statementArg parameter is null, the statement context is removed based only on its statement definition.
427 * @param statementDef statement definition of the statement context to remove
428 * @param statementArg statement argument of the statement context to remove
430 public void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef,
431 final String statementArg) {
432 if (statementArg == null) {
433 removeStatementFromEffectiveSubstatements(statementDef);
436 if (effective.isEmpty()) {
440 final Iterator<StatementContextBase<?, ?, ?>> iterator = effective.iterator();
441 while (iterator.hasNext()) {
442 final Mutable<?, ?, ?> next = iterator.next();
443 if (statementDef.equals(next.getPublicDefinition()) && statementArg.equals(next.rawStatementArgument())) {
451 // YANG example: RPC/action statements always have 'input' and 'output' defined
453 public <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> @NonNull Mutable<X, Y, Z>
454 appendImplicitSubstatement(final StatementSupport<X, Y, Z> support, final String rawArg) {
455 // FIXME: YANGTOOLS-652: This does not need to be a SubstatementContext, in can be a specialized
456 // StatementContextBase subclass.
457 final Mutable<X, Y, Z> ret = new SubstatementContext<>(this, new StatementDefinitionContext<>(support),
458 ImplicitSubstatement.of(getStatementSourceReference()), rawArg);
459 support.onStatementAdded(ret);
460 addEffectiveSubstatement(ret);
465 * Adds an effective statement to collection of substatements.
467 * @param substatement substatement
468 * @throws IllegalStateException
469 * if added in declared phase
470 * @throws NullPointerException
471 * if statement parameter is null
473 public void addEffectiveSubstatement(final Mutable<?, ?, ?> substatement) {
474 verifyStatement(substatement);
475 beforeAddEffectiveStatement(1);
477 final StatementContextBase<?, ?, ?> stmt = (StatementContextBase<?, ?, ?>) substatement;
478 final ModelProcessingPhase phase = completedPhase;
480 ensureCompletedPhase(stmt, phase);
486 * Adds an effective statement to collection of substatements.
488 * @param statements substatements
489 * @throws IllegalStateException
490 * if added in declared phase
491 * @throws NullPointerException
492 * if statement parameter is null
494 public void addEffectiveSubstatements(final Collection<? extends Mutable<?, ?, ?>> statements) {
495 if (!statements.isEmpty()) {
496 statements.forEach(StatementContextBase::verifyStatement);
497 beforeAddEffectiveStatement(statements.size());
499 final Collection<? extends StatementContextBase<?, ?, ?>> casted =
500 (Collection<? extends StatementContextBase<?, ?, ?>>) statements;
501 final ModelProcessingPhase phase = completedPhase;
503 for (StatementContextBase<?, ?, ?> stmt : casted) {
504 ensureCompletedPhase(stmt, phase);
508 effective.addAll(casted);
512 // Make sure target statement has transitioned at least to specified phase. This method is just before we take
513 // allow a statement to become our substatement. This is needed to ensure that every statement tree does not contain
514 // any statements which did not complete the same phase as the root statement.
515 private static void ensureCompletedPhase(final StatementContextBase<?, ?, ?> stmt,
516 final ModelProcessingPhase phase) {
517 verify(stmt.tryToCompletePhase(phase), "Statement %s cannot complete phase %s", stmt, phase);
520 private static void verifyStatement(final Mutable<?, ?, ?> stmt) {
521 verify(stmt instanceof StatementContextBase, "Unexpected statement %s", stmt);
524 private void beforeAddEffectiveStatement(final int toAdd) {
525 // We cannot allow statement to be further mutated
526 final StatementSourceReference ref = getStatementSourceReference();
527 verify(completedPhase != ModelProcessingPhase.EFFECTIVE_MODEL, "Cannot modify finished statement at %s", ref);
529 final ModelProcessingPhase inProgressPhase = getRoot().getSourceContext().getInProgressPhase();
530 checkState(inProgressPhase == ModelProcessingPhase.FULL_DECLARATION
531 || inProgressPhase == ModelProcessingPhase.EFFECTIVE_MODEL,
532 "Effective statement cannot be added in declared phase at: %s", ref);
534 if (effective.isEmpty()) {
535 effective = new ArrayList<>(toAdd);
539 // Exists only due to memory optimization
540 final boolean fullyDefined() {
544 // Exists only due to memory optimization, should live in AbstractResumedStatement
545 final void setFullyDefined() {
550 public E buildEffective() {
552 return (existing = effectiveInstance) != null ? existing : loadEffective();
555 private E loadEffective() {
556 return effectiveInstance = definition.getFactory().createEffective(this);
560 * Try to execute current {@link ModelProcessingPhase} of source parsing. If the phase has already been executed,
561 * this method does nothing.
563 * @param phase to be executed (completed)
564 * @return true if phase was successfully completed
565 * @throws SourceException when an error occurred in source parsing
567 final boolean tryToCompletePhase(final ModelProcessingPhase phase) {
568 return phase.isCompletedBy(completedPhase) || doTryToCompletePhase(phase);
571 private boolean doTryToCompletePhase(final ModelProcessingPhase phase) {
572 final boolean finished = phaseMutation.isEmpty() ? true : runMutations(phase);
573 if (completeChildren(phase) && finished) {
574 onPhaseCompleted(phase);
580 private boolean completeChildren(final ModelProcessingPhase phase) {
581 boolean finished = true;
582 for (final StatementContextBase<?, ?, ?> child : mutableDeclaredSubstatements()) {
583 finished &= child.tryToCompletePhase(phase);
585 for (final StatementContextBase<?, ?, ?> child : effective) {
586 finished &= child.tryToCompletePhase(phase);
591 private boolean runMutations(final ModelProcessingPhase phase) {
592 final Collection<ContextMutation> openMutations = phaseMutation.get(phase);
593 return openMutations.isEmpty() ? true : runMutations(phase, openMutations);
596 private boolean runMutations(final ModelProcessingPhase phase, final Collection<ContextMutation> openMutations) {
597 boolean finished = true;
598 final Iterator<ContextMutation> it = openMutations.iterator();
599 while (it.hasNext()) {
600 final ContextMutation current = it.next();
601 if (current.isFinished()) {
608 if (openMutations.isEmpty()) {
609 phaseMutation.removeAll(phase);
610 if (phaseMutation.isEmpty()) {
611 phaseMutation = ImmutableMultimap.of();
618 * Occurs on end of {@link ModelProcessingPhase} of source parsing.
621 * that was to be completed (finished)
622 * @throws SourceException
623 * when an error occurred in source parsing
625 private void onPhaseCompleted(final ModelProcessingPhase phase) {
626 completedPhase = phase;
628 final Collection<OnPhaseFinished> listeners = phaseListeners.get(phase);
629 if (!listeners.isEmpty()) {
630 runPhaseListeners(phase, listeners);
634 private void runPhaseListeners(final ModelProcessingPhase phase, final Collection<OnPhaseFinished> listeners) {
635 final Iterator<OnPhaseFinished> listener = listeners.iterator();
636 while (listener.hasNext()) {
637 final OnPhaseFinished next = listener.next();
638 if (next.phaseFinished(this, phase)) {
643 if (listeners.isEmpty()) {
644 phaseListeners.removeAll(phase);
645 if (phaseListeners.isEmpty()) {
646 phaseListeners = ImmutableMultimap.of();
652 * Ends declared section of current node.
654 void endDeclared(final ModelProcessingPhase phase) {
655 definition.onDeclarationFinished(this, phase);
659 * Return the context in which this statement was defined.
661 * @return statement definition
663 protected final @NonNull StatementDefinitionContext<A, D, E> definition() {
668 protected void checkLocalNamespaceAllowed(final Class<? extends IdentifierNamespace<?, ?>> type) {
669 definition.checkNamespaceAllowed(type);
673 protected <K, V, N extends IdentifierNamespace<K, V>> void onNamespaceElementAdded(final Class<N> type, final K key,
675 // definition().onNamespaceElementAdded(this, type, key, value);
678 final <K, V, N extends IdentifierNamespace<K, V>> void onNamespaceItemAddedAction(final Class<N> type, final K key,
679 final OnNamespaceItemAdded listener) {
680 final Object potential = getFromNamespace(type, key);
681 if (potential != null) {
682 LOG.trace("Listener on {} key {} satisfied immediately", type, key);
683 listener.namespaceItemAdded(this, type, key, potential);
687 getBehaviour(type).addListener(new KeyedValueAddedListener<>(this, key) {
689 void onValueAdded(final Object value) {
690 listener.namespaceItemAdded(StatementContextBase.this, type, key, value);
695 final <K, V, N extends IdentifierNamespace<K, V>> void onNamespaceItemAddedAction(final Class<N> type,
696 final ModelProcessingPhase phase, final NamespaceKeyCriterion<K> criterion,
697 final OnNamespaceItemAdded listener) {
698 final Optional<Entry<K, V>> existing = getFromNamespace(type, criterion);
699 if (existing.isPresent()) {
700 final Entry<K, V> entry = existing.get();
701 LOG.debug("Listener on {} criterion {} found a pre-existing match: {}", type, criterion, entry);
702 waitForPhase(entry.getValue(), type, phase, criterion, listener);
706 final NamespaceBehaviourWithListeners<K, V, N> behaviour = getBehaviour(type);
707 behaviour.addListener(new PredicateValueAddedListener<K, V>(this) {
709 boolean onValueAdded(final K key, final V value) {
710 if (criterion.match(key)) {
711 LOG.debug("Listener on {} criterion {} matched added key {}", type, criterion, key);
712 waitForPhase(value, type, phase, criterion, listener);
721 final <K, V, N extends IdentifierNamespace<K, V>> void selectMatch(final Class<N> type,
722 final NamespaceKeyCriterion<K> criterion, final OnNamespaceItemAdded listener) {
723 final Optional<Entry<K, V>> optMatch = getFromNamespace(type, criterion);
724 checkState(optMatch.isPresent(), "Failed to find a match for criterion %s in namespace %s node %s", criterion,
726 final Entry<K, V> match = optMatch.get();
727 listener.namespaceItemAdded(StatementContextBase.this, type, match.getKey(), match.getValue());
730 final <K, V, N extends IdentifierNamespace<K, V>> void waitForPhase(final Object value, final Class<N> type,
731 final ModelProcessingPhase phase, final NamespaceKeyCriterion<K> criterion,
732 final OnNamespaceItemAdded listener) {
733 ((StatementContextBase<?, ? ,?>) value).addPhaseCompletedListener(phase,
734 (context, phaseCompleted) -> {
735 selectMatch(type, criterion, listener);
740 private <K, V, N extends IdentifierNamespace<K, V>> NamespaceBehaviourWithListeners<K, V, N> getBehaviour(
741 final Class<N> type) {
742 final NamespaceBehaviour<K, V, N> behaviour = getBehaviourRegistry().getNamespaceBehaviour(type);
743 checkArgument(behaviour instanceof NamespaceBehaviourWithListeners, "Namespace %s does not support listeners",
746 return (NamespaceBehaviourWithListeners<K, V, N>) behaviour;
750 public StatementDefinition getPublicDefinition() {
751 return definition.getPublicView();
755 public ModelActionBuilder newInferenceAction(final ModelProcessingPhase phase) {
756 return getRoot().getSourceContext().newInferenceAction(phase);
759 private static <T> Multimap<ModelProcessingPhase, T> newMultimap() {
760 return Multimaps.newListMultimap(new EnumMap<>(ModelProcessingPhase.class), () -> new ArrayList<>(1));
764 * Adds {@link OnPhaseFinished} listener for a {@link ModelProcessingPhase} end. If the base has already completed
765 * the listener is notified immediately.
767 * @param phase requested completion phase
768 * @param listener listener to invoke
769 * @throws NullPointerException if any of the arguments is null
771 void addPhaseCompletedListener(final ModelProcessingPhase phase, final OnPhaseFinished listener) {
772 checkNotNull(phase, "Statement context processing phase cannot be null at: %s", getStatementSourceReference());
773 checkNotNull(listener, "Statement context phase listener cannot be null at: %s", getStatementSourceReference());
775 ModelProcessingPhase finishedPhase = completedPhase;
776 while (finishedPhase != null) {
777 if (phase.equals(finishedPhase)) {
778 listener.phaseFinished(this, finishedPhase);
781 finishedPhase = finishedPhase.getPreviousPhase();
783 if (phaseListeners.isEmpty()) {
784 phaseListeners = newMultimap();
787 phaseListeners.put(phase, listener);
791 * Adds a {@link ContextMutation} to a {@link ModelProcessingPhase}.
793 * @throws IllegalStateException
794 * when the mutation was registered after phase was completed
796 void addMutation(final ModelProcessingPhase phase, final ContextMutation mutation) {
797 ModelProcessingPhase finishedPhase = completedPhase;
798 while (finishedPhase != null) {
799 checkState(!phase.equals(finishedPhase), "Mutation registered after phase was completed at: %s",
800 getStatementSourceReference());
801 finishedPhase = finishedPhase.getPreviousPhase();
804 if (phaseMutation.isEmpty()) {
805 phaseMutation = newMultimap();
807 phaseMutation.put(phase, mutation);
811 public <K, KT extends K, N extends StatementNamespace<K, ?, ?>> void addContext(final Class<N> namespace,
812 final KT key,final StmtContext<?, ?, ?> stmt) {
813 addContextToNamespace(namespace, key, stmt);
817 public Optional<? extends Mutable<?, ?, ?>> copyAsChildOf(final Mutable<?, ?, ?> parent, final CopyType type,
818 final QNameModule targetModule) {
819 checkEffectiveModelCompleted(this);
821 final StatementSupport<A, D, E> support = definition.support();
822 final CopyPolicy policy = support.applyCopyPolicy(this, parent, type, targetModule);
824 case CONTEXT_INDEPENDENT:
825 if (hasEmptySubstatements()) {
826 // This statement is context-independent and has no substatements -- hence it can be freely shared.
827 return Optional.of(this);
829 // FIXME: YANGTOOLS-694: filter out all context-independent substatements, eliminate fall-through
832 // FIXME: YANGTOOLS-694: this is still to eager, we really want to copy as a lazily-instantiated
833 // context, so that we can support building an effective statement without copying
834 // anything -- we will typically end up not being inferred against. In that case,
835 // this slim context should end up dealing with differences at buildContext()
836 // time. This is a YANGTOOLS-1067 prerequisite (which will deal with what can and
837 // cannot be shared across instances).
838 return Optional.of(parent.childCopyOf(this, type, targetModule));
840 return Optional.empty();
842 throw new IllegalStateException("Statement " + support.getPublicView() + " should never be copied");
844 throw new IllegalStateException("Unhandled policy " + policy);
849 public <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> Mutable<X, Y, Z> childCopyOf(
850 final StmtContext<X, Y, Z> stmt, final CopyType type, final QNameModule targetModule) {
851 checkEffectiveModelCompleted(stmt);
852 checkArgument(stmt instanceof StatementContextBase, "Unsupported statement %s", stmt);
853 return childCopyOf((StatementContextBase<X, Y, Z>)stmt, type, targetModule);
856 private <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> Mutable<X, Y, Z> childCopyOf(
857 final StatementContextBase<X, Y, Z> original, final CopyType type, final QNameModule targetModule) {
858 final Optional<StatementSupport<?, ?, ?>> implicitParent = definition.getImplicitParentFor(
859 original.getPublicDefinition());
861 final StatementContextBase<X, Y, Z> result;
862 final InferredStatementContext<X, Y, Z> copy;
864 if (implicitParent.isPresent()) {
865 final StatementDefinitionContext<?, ?, ?> def = new StatementDefinitionContext<>(implicitParent.get());
866 result = new SubstatementContext(this, def, original.getStatementSourceReference(),
867 original.rawStatementArgument(), original.getStatementArgument(), type);
869 final CopyType childCopyType;
871 case ADDED_BY_AUGMENTATION:
872 childCopyType = CopyType.ORIGINAL;
874 case ADDED_BY_USES_AUGMENTATION:
875 childCopyType = CopyType.ADDED_BY_USES;
880 childCopyType = type;
883 copy = new InferredStatementContext<>(result, original, childCopyType, type, targetModule);
884 result.addEffectiveSubstatement(copy);
886 result = copy = new InferredStatementContext<>(this, original, type, type, targetModule);
889 original.definition.onStatementAdded(copy);
893 private static void checkEffectiveModelCompleted(final StmtContext<?, ?, ?> stmt) {
894 final ModelProcessingPhase phase = stmt.getCompletedPhase();
895 checkState(phase == ModelProcessingPhase.EFFECTIVE_MODEL,
896 "Attempted to copy statement %s which has completed phase %s", stmt, phase);
900 public final boolean hasImplicitParentSupport() {
901 return definition.getFactory() instanceof ImplicitParentAwareStatementSupport;
905 public final StatementContextBase<?, ?, ?> wrapWithImplicit(final StatementContextBase<?, ?, ?> original) {
906 final Optional<StatementSupport<?, ?, ?>> optImplicit = definition.getImplicitParentFor(
907 original.getPublicDefinition());
908 if (optImplicit.isEmpty()) {
912 final StatementDefinitionContext<?, ?, ?> def = new StatementDefinitionContext<>(optImplicit.get());
913 final CopyType type = original.getCopyHistory().getLastOperation();
914 final SubstatementContext<?, ?, ?> result = new SubstatementContext(original.getParentContext(), def,
915 original.getStatementSourceReference(), original.rawStatementArgument(), original.getStatementArgument(),
918 result.addEffectiveSubstatement(original.reparent(result));
919 result.setCompletedPhase(original.getCompletedPhase());
923 abstract StatementContextBase<A, D, E> reparent(StatementContextBase<?, ?, ?> newParent);
926 * Indicate that the set of substatements is empty. This is a preferred shortcut to substatement stream filtering.
928 * @return True if {@link #allSubstatements()} and {@link #allSubstatementsStream()} would return an empty stream.
930 abstract boolean hasEmptySubstatements();
932 final boolean hasEmptyEffectiveSubstatements() {
933 return effective.isEmpty();
937 * Config statements are not all that common which means we are performing a recursive search towards the root
938 * every time {@link #isConfiguration()} is invoked. This is quite expensive because it causes a linear search
939 * for the (usually non-existent) config statement.
942 * This method maintains a resolution cache, so once we have returned a result, we will keep on returning the same
943 * result without performing any lookups, solely to support {@link SubstatementContext#isConfiguration()}.
946 * Note: use of this method implies that {@link #isIgnoringConfig()} is realized with
947 * {@link #isIgnoringConfig(StatementContextBase)}.
949 final boolean isConfiguration(final StatementContextBase<?, ?, ?> parent) {
950 final int fl = flags & SET_CONFIGURATION;
952 return fl == SET_CONFIGURATION;
954 if (isIgnoringConfig(parent)) {
955 // Note: SET_CONFIGURATION has been stored in flags
959 final StmtContext<Boolean, ?, ?> configStatement = StmtContextUtils.findFirstSubstatement(this,
960 ConfigStatement.class);
961 final boolean isConfig;
962 if (configStatement != null) {
963 isConfig = configStatement.coerceStatementArgument();
965 // Validity check: if parent is config=false this cannot be a config=true
966 InferenceException.throwIf(!parent.isConfiguration(), getStatementSourceReference(),
967 "Parent node has config=false, this node must not be specifed as config=true");
970 // If "config" statement is not specified, the default is the same as the parent's "config" value.
971 isConfig = parent.isConfiguration();
974 // Resolved, make sure we cache this return
975 flags |= isConfig ? SET_CONFIGURATION : HAVE_CONFIGURATION;
979 protected abstract boolean isIgnoringConfig();
982 * This method maintains a resolution cache for ignore config, so once we have returned a result, we will
983 * keep on returning the same result without performing any lookups. Exists only to support
984 * {@link SubstatementContext#isIgnoringConfig()}.
987 * Note: use of this method implies that {@link #isConfiguration()} is realized with
988 * {@link #isConfiguration(StatementContextBase)}.
990 final boolean isIgnoringConfig(final StatementContextBase<?, ?, ?> parent) {
991 final int fl = flags & SET_IGNORE_CONFIG;
993 return fl == SET_IGNORE_CONFIG;
995 if (definition.support().isIgnoringConfig() || parent.isIgnoringConfig()) {
996 flags |= SET_IGNORE_CONFIG;
1000 flags |= HAVE_IGNORE_CONFIG;
1004 protected abstract boolean isIgnoringIfFeatures();
1007 * This method maintains a resolution cache for ignore if-feature, so once we have returned a result, we will
1008 * keep on returning the same result without performing any lookups. Exists only to support
1009 * {@link SubstatementContext#isIgnoringIfFeatures()}.
1011 final boolean isIgnoringIfFeatures(final StatementContextBase<?, ?, ?> parent) {
1012 final int fl = flags & SET_IGNORE_IF_FEATURE;
1014 return fl == SET_IGNORE_IF_FEATURE;
1016 if (definition.support().isIgnoringIfFeatures() || parent.isIgnoringIfFeatures()) {
1017 flags |= SET_IGNORE_IF_FEATURE;
1021 flags |= HAVE_IGNORE_IF_FEATURE;
1025 // Exists only to support SubstatementContext/InferredStatementContext
1026 final @NonNull Optional<SchemaPath> substatementGetSchemaPath() {
1027 SchemaPath local = schemaPath;
1028 if (local == null) {
1029 synchronized (this) {
1031 if (local == null) {
1032 local = createSchemaPath(coerceParentContext());
1038 return Optional.ofNullable(local);
1041 private SchemaPath createSchemaPath(final Mutable<?, ?, ?> parent) {
1042 final Optional<SchemaPath> maybeParentPath = parent.getSchemaPath();
1043 verify(maybeParentPath.isPresent(), "Parent %s does not have a SchemaPath", parent);
1044 final SchemaPath parentPath = maybeParentPath.get();
1046 if (StmtContextUtils.isUnknownStatement(this)) {
1047 return parentPath.createChild(getPublicDefinition().getStatementName());
1049 final Object argument = getStatementArgument();
1050 if (argument instanceof QName) {
1051 final QName qname = (QName) argument;
1052 if (StmtContextUtils.producesDeclared(this, UsesStatement.class)) {
1053 return maybeParentPath.orElse(null);
1056 return parentPath.createChild(qname);
1058 if (argument instanceof String) {
1059 // FIXME: This may yield illegal argument exceptions
1060 final Optional<StmtContext<?, ?, ?>> originalCtx = getOriginalCtx();
1061 final QName qname = StmtContextUtils.qnameFromArgument(originalCtx.orElse(this), (String) argument);
1062 return parentPath.createChild(qname);
1064 if (argument instanceof SchemaNodeIdentifier
1065 && (StmtContextUtils.producesDeclared(this, AugmentStatement.class)
1066 || StmtContextUtils.producesDeclared(this, RefineStatement.class)
1067 || StmtContextUtils.producesDeclared(this, DeviationStatement.class))) {
1069 return parentPath.createChild(((SchemaNodeIdentifier) argument).getPathFromRoot());
1072 // FIXME: this does not look right
1073 return maybeParentPath.orElse(null);
1077 public final String toString() {
1078 return addToStringAttributes(MoreObjects.toStringHelper(this).omitNullValues()).toString();
1081 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
1082 return toStringHelper.add("definition", definition).add("rawArgument", rawStatementArgument());