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.checkState;
12 import static com.google.common.base.Verify.verify;
13 import static com.google.common.base.Verify.verifyNotNull;
14 import static java.util.Objects.requireNonNull;
16 import com.google.common.annotations.Beta;
17 import com.google.common.base.VerifyException;
18 import com.google.common.collect.ImmutableCollection;
19 import com.google.common.collect.ImmutableList;
20 import com.google.common.collect.ImmutableMultimap;
21 import com.google.common.collect.Multimap;
22 import com.google.common.collect.Multimaps;
23 import java.util.ArrayList;
24 import java.util.Collection;
25 import java.util.Collections;
26 import java.util.EnumMap;
27 import java.util.EventListener;
28 import java.util.Iterator;
29 import java.util.List;
30 import java.util.Map.Entry;
31 import java.util.Optional;
32 import java.util.stream.Stream;
33 import org.eclipse.jdt.annotation.NonNull;
34 import org.opendaylight.yangtools.yang.common.QNameModule;
35 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
36 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
37 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
38 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyHistory;
39 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
40 import org.opendaylight.yangtools.yang.parser.spi.meta.ImplicitParentAwareStatementSupport;
41 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
42 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
43 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase.ExecutionOrder;
44 import org.opendaylight.yangtools.yang.parser.spi.meta.MutableStatement;
45 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour;
46 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceKeyCriterion;
47 import org.opendaylight.yangtools.yang.parser.spi.meta.ParserNamespace;
48 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementFactory;
49 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementNamespace;
50 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport;
51 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport.CopyPolicy;
52 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
53 import org.opendaylight.yangtools.yang.parser.spi.source.ImplicitSubstatement;
54 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
55 import org.opendaylight.yangtools.yang.parser.stmt.reactor.NamespaceBehaviourWithListeners.KeyedValueAddedListener;
56 import org.opendaylight.yangtools.yang.parser.stmt.reactor.NamespaceBehaviourWithListeners.PredicateValueAddedListener;
57 import org.slf4j.Logger;
58 import org.slf4j.LoggerFactory;
61 * Core reactor statement implementation of {@link Mutable}.
63 * @param <A> Argument type
64 * @param <D> Declared Statement representation
65 * @param <E> Effective Statement representation
67 public abstract class StatementContextBase<A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>>
68 extends ReactorStmtCtx<A, D, E> implements CopyHistory {
70 * Event listener when an item is added to model namespace.
72 interface OnNamespaceItemAdded extends EventListener {
74 * Invoked whenever a new item is added to a namespace.
76 void namespaceItemAdded(StatementContextBase<?, ?, ?> context, Class<?> namespace, Object key, Object value);
80 * Event listener when a parsing {@link ModelProcessingPhase} is completed.
82 interface OnPhaseFinished extends EventListener {
84 * Invoked whenever a processing phase has finished.
86 boolean phaseFinished(StatementContextBase<?, ?, ?> context, ModelProcessingPhase finishedPhase);
90 * Interface for all mutations within an {@link ModelActionBuilder.InferenceAction}.
92 interface ContextMutation {
97 private static final Logger LOG = LoggerFactory.getLogger(StatementContextBase.class);
100 // {@link CopyHistory} encoded as a single byte. We still have 4 bits unused.
102 private static final byte COPY_LAST_TYPE_MASK = 0x03;
103 private static final byte COPY_ADDED_BY_USES = 0x04;
104 private static final byte COPY_ADDED_BY_AUGMENTATION = 0x08;
105 private static final byte COPY_ORIGINAL = 0x00;
107 private final byte copyHistory;
110 final int copyTypes = CopyType.values().length;
111 // This implies CopyType.ordinal() is <= COPY_TYPE_MASK
112 verify(copyTypes == COPY_LAST_TYPE_MASK + 1, "Unexpected %s CopyType values", copyTypes);
115 // Note: this field can strictly be derived in InferredStatementContext, but it forms the basis of many of our
116 // operations, hence we want to keep it close by.
117 private final @NonNull StatementDefinitionContext<A, D, E> definition;
119 // TODO: consider keying by Byte equivalent of ExecutionOrder
120 private Multimap<ModelProcessingPhase, OnPhaseFinished> phaseListeners = ImmutableMultimap.of();
121 private Multimap<ModelProcessingPhase, ContextMutation> phaseMutation = ImmutableMultimap.of();
123 private List<StmtContext<?, ?, ?>> effectOfStatement = ImmutableList.of();
126 * {@link ModelProcessingPhase.ExecutionOrder} value of current {@link ModelProcessingPhase} of this statement.
128 private byte executionOrder;
130 // Copy constructor used by subclasses to implement reparent()
131 StatementContextBase(final StatementContextBase<A, D, E> original) {
133 this.copyHistory = original.copyHistory;
134 this.definition = original.definition;
135 this.executionOrder = original.executionOrder;
138 StatementContextBase(final StatementDefinitionContext<A, D, E> def) {
139 this.definition = requireNonNull(def);
140 this.copyHistory = COPY_ORIGINAL;
143 StatementContextBase(final StatementDefinitionContext<A, D, E> def, final byte copyHistory) {
144 this.definition = requireNonNull(def);
145 this.copyHistory = copyHistory;
148 StatementContextBase(final StatementDefinitionContext<A, D, E> def, final CopyType copyType) {
149 this.definition = requireNonNull(def);
150 this.copyHistory = (byte) copyFlags(copyType);
153 StatementContextBase(final StatementContextBase<A, D, E> prototype, final CopyType copyType) {
154 this.definition = prototype.definition;
155 this.copyHistory = (byte) (copyFlags(copyType) | prototype.copyHistory & ~COPY_LAST_TYPE_MASK);
158 private static int copyFlags(final CopyType copyType) {
159 return historyFlags(copyType) | copyType.ordinal();
162 private static byte historyFlags(final CopyType copyType) {
164 case ADDED_BY_AUGMENTATION:
165 return COPY_ADDED_BY_AUGMENTATION;
167 return COPY_ADDED_BY_USES;
168 case ADDED_BY_USES_AUGMENTATION:
169 return COPY_ADDED_BY_AUGMENTATION | COPY_ADDED_BY_USES;
171 return COPY_ORIGINAL;
173 throw new VerifyException("Unhandled type " + copyType);
178 public Collection<? extends StmtContext<?, ?, ?>> getEffectOfStatement() {
179 return effectOfStatement;
183 public void addAsEffectOfStatement(final Collection<? extends StmtContext<?, ?, ?>> ctxs) {
184 if (ctxs.isEmpty()) {
188 if (effectOfStatement.isEmpty()) {
189 effectOfStatement = new ArrayList<>(ctxs.size());
191 effectOfStatement.addAll(ctxs);
195 // CopyHistory integration
199 public final CopyHistory history() {
204 public final boolean isAddedByUses() {
205 return (copyHistory & COPY_ADDED_BY_USES) != 0;
209 public final boolean isAugmenting() {
210 return (copyHistory & COPY_ADDED_BY_AUGMENTATION) != 0;
214 public final CopyType getLastOperation() {
215 return CopyType.values()[copyHistory & COPY_LAST_TYPE_MASK];
219 // Inference completion tracking
223 final byte executionOrder() {
224 return executionOrder;
227 // FIXME: this should be propagated through a correct constructor
229 final void setCompletedPhase(final ModelProcessingPhase completedPhase) {
230 this.executionOrder = completedPhase.executionOrder();
234 public final <K, V, T extends K, U extends V, N extends ParserNamespace<K, V>> void addToNs(
235 final Class<@NonNull N> type, final T key, final U value) {
236 addToNamespace(type, key, value);
239 static final Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements(
240 final List<ReactorStmtCtx<?, ?, ?>> effective) {
241 return effective instanceof ImmutableCollection ? effective : Collections.unmodifiableCollection(effective);
244 private static List<ReactorStmtCtx<?, ?, ?>> shrinkEffective(final List<ReactorStmtCtx<?, ?, ?>> effective) {
245 return effective.isEmpty() ? ImmutableList.of() : effective;
248 public abstract void removeStatementFromEffectiveSubstatements(StatementDefinition statementDef);
250 static final List<ReactorStmtCtx<?, ?, ?>> removeStatementFromEffectiveSubstatements(
251 final List<ReactorStmtCtx<?, ?, ?>> effective, final StatementDefinition statementDef) {
252 if (effective.isEmpty()) {
256 final Iterator<? extends StmtContext<?, ?, ?>> iterator = effective.iterator();
257 while (iterator.hasNext()) {
258 final StmtContext<?, ?, ?> next = iterator.next();
259 if (statementDef.equals(next.publicDefinition())) {
264 return shrinkEffective(effective);
268 * Removes a statement context from the effective substatements based on its statement definition (i.e statement
269 * keyword) and raw (in String form) statement argument. The statement context is removed only if both statement
270 * definition and statement argument match with one of the effective substatements' statement definition
274 * If the statementArg parameter is null, the statement context is removed based only on its statement definition.
276 * @param statementDef statement definition of the statement context to remove
277 * @param statementArg statement argument of the statement context to remove
279 public abstract void removeStatementFromEffectiveSubstatements(StatementDefinition statementDef,
280 String statementArg);
282 static final List<ReactorStmtCtx<?, ?, ?>> removeStatementFromEffectiveSubstatements(
283 final List<ReactorStmtCtx<?, ?, ?>> effective, final StatementDefinition statementDef,
284 final String statementArg) {
285 if (statementArg == null) {
286 return removeStatementFromEffectiveSubstatements(effective, statementDef);
289 if (effective.isEmpty()) {
293 final Iterator<ReactorStmtCtx<?, ?, ?>> iterator = effective.iterator();
294 while (iterator.hasNext()) {
295 final Mutable<?, ?, ?> next = iterator.next();
296 if (statementDef.equals(next.publicDefinition()) && statementArg.equals(next.rawArgument())) {
301 return shrinkEffective(effective);
304 // YANG example: RPC/action statements always have 'input' and 'output' defined
306 public <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> @NonNull Mutable<X, Y, Z>
307 appendImplicitSubstatement(final StatementSupport<X, Y, Z> support, final String rawArg) {
308 // FIXME: YANGTOOLS-652: This does not need to be a SubstatementContext, in can be a specialized
309 // StatementContextBase subclass.
310 final Mutable<X, Y, Z> ret = new SubstatementContext<>(this, new StatementDefinitionContext<>(support),
311 ImplicitSubstatement.of(sourceReference()), rawArg);
312 support.onStatementAdded(ret);
313 addEffectiveSubstatement(ret);
318 * Adds an effective statement to collection of substatements.
320 * @param substatement substatement
321 * @throws IllegalStateException if added in declared phase
322 * @throws NullPointerException if statement parameter is null
324 public abstract void addEffectiveSubstatement(Mutable<?, ?, ?> substatement);
326 final List<ReactorStmtCtx<?, ?, ?>> addEffectiveSubstatement(final List<ReactorStmtCtx<?, ?, ?>> effective,
327 final Mutable<?, ?, ?> substatement) {
328 verifyStatement(substatement);
330 final List<ReactorStmtCtx<?, ?, ?>> resized = beforeAddEffectiveStatement(effective, 1);
331 final ReactorStmtCtx<?, ?, ?> stmt = (ReactorStmtCtx<?, ?, ?>) substatement;
332 ensureCompletedExecution(stmt);
338 * Adds an effective statement to collection of substatements.
340 * @param statements substatements
341 * @throws IllegalStateException
342 * if added in declared phase
343 * @throws NullPointerException
344 * if statement parameter is null
346 public final void addEffectiveSubstatements(final Collection<? extends Mutable<?, ?, ?>> statements) {
347 if (!statements.isEmpty()) {
348 statements.forEach(StatementContextBase::verifyStatement);
349 addEffectiveSubstatementsImpl(statements);
353 abstract void addEffectiveSubstatementsImpl(Collection<? extends Mutable<?, ?, ?>> statements);
355 final List<ReactorStmtCtx<?, ?, ?>> addEffectiveSubstatementsImpl(final List<ReactorStmtCtx<?, ?, ?>> effective,
356 final Collection<? extends Mutable<?, ?, ?>> statements) {
357 final List<ReactorStmtCtx<?, ?, ?>> resized = beforeAddEffectiveStatement(effective, statements.size());
358 final Collection<? extends ReactorStmtCtx<?, ?, ?>> casted =
359 (Collection<? extends ReactorStmtCtx<?, ?, ?>>) statements;
360 if (executionOrder != ExecutionOrder.NULL) {
361 for (ReactorStmtCtx<?, ?, ?> stmt : casted) {
362 ensureCompletedExecution(stmt, executionOrder);
366 resized.addAll(casted);
370 abstract Iterable<ReactorStmtCtx<?, ?, ?>> effectiveChildrenToComplete();
372 // exposed for InferredStatementContext only
373 final void ensureCompletedPhase(final Mutable<?, ?, ?> stmt) {
374 verifyStatement(stmt);
375 ensureCompletedExecution((ReactorStmtCtx<?, ?, ?>) stmt);
378 // Make sure target statement has transitioned at least to our phase (if we have one). This method is just before we
379 // take allow a statement to become our substatement. This is needed to ensure that every statement tree does not
380 // contain any statements which did not complete the same phase as the root statement.
381 private void ensureCompletedExecution(final ReactorStmtCtx<?, ?, ?> stmt) {
382 if (executionOrder != ExecutionOrder.NULL) {
383 ensureCompletedExecution(stmt, executionOrder);
387 private static void ensureCompletedExecution(final ReactorStmtCtx<?, ?, ?> stmt, final byte executionOrder) {
388 verify(stmt.tryToCompletePhase(executionOrder), "Statement %s cannot complete phase %s", stmt, executionOrder);
391 private static void verifyStatement(final Mutable<?, ?, ?> stmt) {
392 verify(stmt instanceof ReactorStmtCtx, "Unexpected statement %s", stmt);
395 private List<ReactorStmtCtx<?, ?, ?>> beforeAddEffectiveStatement(final List<ReactorStmtCtx<?, ?, ?>> effective,
397 // We cannot allow statement to be further mutated.
398 // TODO: we really want to say 'not NULL and not at or after EFFECTIVE_MODEL here. This will matter if we have
399 // a phase after EFFECTIVE_MODEL
400 verify(executionOrder != ExecutionOrder.EFFECTIVE_MODEL, "Cannot modify finished statement at %s",
402 return beforeAddEffectiveStatementUnsafe(effective, toAdd);
405 final List<ReactorStmtCtx<?, ?, ?>> beforeAddEffectiveStatementUnsafe(final List<ReactorStmtCtx<?, ?, ?>> effective,
407 final ModelProcessingPhase inProgressPhase = getRoot().getSourceContext().getInProgressPhase();
408 checkState(inProgressPhase == ModelProcessingPhase.FULL_DECLARATION
409 || inProgressPhase == ModelProcessingPhase.EFFECTIVE_MODEL,
410 "Effective statement cannot be added in declared phase at: %s", sourceReference());
412 return effective.isEmpty() ? new ArrayList<>(toAdd) : effective;
416 final E createEffective() {
417 final E result = createEffective(definition.getFactory());
418 if (result instanceof MutableStatement) {
419 getRoot().addMutableStmtToSeal((MutableStatement) result);
424 @NonNull E createEffective(final StatementFactory<A, D, E> factory) {
425 return createEffective(factory, this);
428 // Creates EffectiveStatement through full materialization
429 static <A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>> @NonNull E createEffective(
430 final StatementFactory<A, D, E> factory, final StatementContextBase<A, D, E> ctx) {
431 return factory.createEffective(ctx, ctx.streamDeclared(), ctx.streamEffective());
435 * Return a stream of declared statements which can be built into an {@link EffectiveStatement}, as per
436 * {@link StmtContext#buildEffective()} contract.
438 * @return Stream of supported declared statements.
440 // FIXME: we really want to unify this with streamEffective(), under its name
441 abstract Stream<? extends @NonNull StmtContext<?, ?, ?>> streamDeclared();
444 * Return a stream of inferred statements which can be built into an {@link EffectiveStatement}, as per
445 * {@link StmtContext#buildEffective()} contract.
447 * @return Stream of supported effective statements.
449 // FIXME: this method is currently a misnomer, but unifying with streamDeclared() would make this accurate again
450 abstract Stream<? extends @NonNull StmtContext<?, ?, ?>> streamEffective();
453 final boolean doTryToCompletePhase(final byte targetOrder) {
454 final boolean finished = phaseMutation.isEmpty() ? true : runMutations(targetOrder);
455 if (completeChildren(targetOrder) && finished) {
456 onPhaseCompleted(targetOrder);
462 private boolean completeChildren(final byte targetOrder) {
463 boolean finished = true;
464 for (final StatementContextBase<?, ?, ?> child : mutableDeclaredSubstatements()) {
465 finished &= child.tryToCompletePhase(targetOrder);
467 for (final ReactorStmtCtx<?, ?, ?> child : effectiveChildrenToComplete()) {
468 finished &= child.tryToCompletePhase(targetOrder);
473 private boolean runMutations(final byte targetOrder) {
474 final ModelProcessingPhase phase = verifyNotNull(ModelProcessingPhase.ofExecutionOrder(targetOrder));
475 final Collection<ContextMutation> openMutations = phaseMutation.get(phase);
476 return openMutations.isEmpty() ? true : runMutations(phase, openMutations);
479 private boolean runMutations(final ModelProcessingPhase phase, final Collection<ContextMutation> openMutations) {
480 boolean finished = true;
481 final Iterator<ContextMutation> it = openMutations.iterator();
482 while (it.hasNext()) {
483 final ContextMutation current = it.next();
484 if (current.isFinished()) {
491 if (openMutations.isEmpty()) {
492 phaseMutation.removeAll(phase);
493 cleanupPhaseMutation();
498 private void cleanupPhaseMutation() {
499 if (phaseMutation.isEmpty()) {
500 phaseMutation = ImmutableMultimap.of();
505 * Occurs on end of {@link ModelProcessingPhase} of source parsing. This method must not be called with
506 * {@code executionOrder} equal to {@link ExecutionOrder#NULL}.
508 * @param phase that was to be completed (finished)
509 * @throws SourceException when an error occurred in source parsing
511 private void onPhaseCompleted(final byte completedOrder) {
512 executionOrder = completedOrder;
513 if (completedOrder == ExecutionOrder.EFFECTIVE_MODEL) {
514 // We have completed effective model, substatements are guaranteed not to change
515 summarizeSubstatementPolicy();
518 final ModelProcessingPhase phase = verifyNotNull(ModelProcessingPhase.ofExecutionOrder(completedOrder));
519 final Collection<OnPhaseFinished> listeners = phaseListeners.get(phase);
520 if (!listeners.isEmpty()) {
521 runPhaseListeners(phase, listeners);
525 private void summarizeSubstatementPolicy() {
526 if (definition().support().copyPolicy() == CopyPolicy.EXACT_REPLICA || noSensitiveSubstatements()) {
527 setAllSubstatementsContextIndependent();
532 * Determine whether any substatements are copy-sensitive as determined by {@link StatementSupport#copyPolicy()}.
533 * Only {@link CopyPolicy#CONTEXT_INDEPENDENT}, {@link CopyPolicy#EXACT_REPLICA} and {@link CopyPolicy#IGNORE} are
534 * copy-insensitive. Note that statements which are not {@link StmtContext#isSupportedToBuildEffective()} are all
535 * considered copy-insensitive.
538 * Implementations are expected to call {@link #noSensitiveSubstatements()} to actually traverse substatement sets.
540 * @return True if no substatements require copy-sensitive handling
542 abstract boolean noSensitiveSubstatements();
545 * Determine whether any of the provided substatements are context-sensitive for purposes of implementing
546 * {@link #noSensitiveSubstatements()}.
548 * @param substatements Substatements to check
549 * @return True if no substatements require context-sensitive handling
551 static boolean noSensitiveSubstatements(final Collection<? extends ReactorStmtCtx<?, ?, ?>> substatements) {
552 for (ReactorStmtCtx<?, ?, ?> stmt : substatements) {
553 if (stmt.isSupportedToBuildEffective()) {
554 if (!stmt.allSubstatementsContextIndependent()) {
555 // This is a recursive property
559 switch (stmt.definition().support().copyPolicy()) {
560 case CONTEXT_INDEPENDENT:
572 private void runPhaseListeners(final ModelProcessingPhase phase, final Collection<OnPhaseFinished> listeners) {
573 final Iterator<OnPhaseFinished> listener = listeners.iterator();
574 while (listener.hasNext()) {
575 final OnPhaseFinished next = listener.next();
576 if (next.phaseFinished(this, phase)) {
581 if (listeners.isEmpty()) {
582 phaseListeners.removeAll(phase);
583 if (phaseListeners.isEmpty()) {
584 phaseListeners = ImmutableMultimap.of();
590 * Ends declared section of current node.
592 void endDeclared(final ModelProcessingPhase phase) {
593 definition.onDeclarationFinished(this, phase);
597 final StatementDefinitionContext<A, D, E> definition() {
601 final <K, V, N extends ParserNamespace<K, V>> void onNamespaceItemAddedAction(final Class<N> type, final K key,
602 final OnNamespaceItemAdded listener) {
603 final Object potential = getFromNamespace(type, key);
604 if (potential != null) {
605 LOG.trace("Listener on {} key {} satisfied immediately", type, key);
606 listener.namespaceItemAdded(this, type, key, potential);
610 getBehaviour(type).addListener(new KeyedValueAddedListener<>(this, key) {
612 void onValueAdded(final Object value) {
613 listener.namespaceItemAdded(StatementContextBase.this, type, key, value);
618 final <K, V, N extends ParserNamespace<K, V>> void onNamespaceItemAddedAction(final Class<N> type,
619 final ModelProcessingPhase phase, final NamespaceKeyCriterion<K> criterion,
620 final OnNamespaceItemAdded listener) {
621 final Optional<Entry<K, V>> existing = getFromNamespace(type, criterion);
622 if (existing.isPresent()) {
623 final Entry<K, V> entry = existing.get();
624 LOG.debug("Listener on {} criterion {} found a pre-existing match: {}", type, criterion, entry);
625 waitForPhase(entry.getValue(), type, phase, criterion, listener);
629 final NamespaceBehaviourWithListeners<K, V, N> behaviour = getBehaviour(type);
630 behaviour.addListener(new PredicateValueAddedListener<K, V>(this) {
632 boolean onValueAdded(final K key, final V value) {
633 if (criterion.match(key)) {
634 LOG.debug("Listener on {} criterion {} matched added key {}", type, criterion, key);
635 waitForPhase(value, type, phase, criterion, listener);
644 final <K, V, N extends ParserNamespace<K, V>> void selectMatch(final Class<N> type,
645 final NamespaceKeyCriterion<K> criterion, final OnNamespaceItemAdded listener) {
646 final Optional<Entry<K, V>> optMatch = getFromNamespace(type, criterion);
647 checkState(optMatch.isPresent(), "Failed to find a match for criterion %s in namespace %s node %s", criterion,
649 final Entry<K, V> match = optMatch.get();
650 listener.namespaceItemAdded(StatementContextBase.this, type, match.getKey(), match.getValue());
653 final <K, V, N extends ParserNamespace<K, V>> void waitForPhase(final Object value, final Class<N> type,
654 final ModelProcessingPhase phase, final NamespaceKeyCriterion<K> criterion,
655 final OnNamespaceItemAdded listener) {
656 ((StatementContextBase<?, ? ,?>) value).addPhaseCompletedListener(phase,
657 (context, phaseCompleted) -> {
658 selectMatch(type, criterion, listener);
663 private <K, V, N extends ParserNamespace<K, V>> NamespaceBehaviourWithListeners<K, V, N> getBehaviour(
664 final Class<N> type) {
665 final NamespaceBehaviour<K, V, N> behaviour = getBehaviourRegistry().getNamespaceBehaviour(type);
666 checkArgument(behaviour instanceof NamespaceBehaviourWithListeners, "Namespace %s does not support listeners",
669 return (NamespaceBehaviourWithListeners<K, V, N>) behaviour;
672 private static <T> Multimap<ModelProcessingPhase, T> newMultimap() {
673 return Multimaps.newListMultimap(new EnumMap<>(ModelProcessingPhase.class), () -> new ArrayList<>(1));
677 * Adds {@link OnPhaseFinished} listener for a {@link ModelProcessingPhase} end. If the base has already completed
678 * the listener is notified immediately.
680 * @param phase requested completion phase
681 * @param listener listener to invoke
682 * @throws NullPointerException if any of the arguments is null
684 void addPhaseCompletedListener(final ModelProcessingPhase phase, final OnPhaseFinished listener) {
685 requireNonNull(phase, "Statement context processing phase cannot be null");
686 requireNonNull(listener, "Statement context phase listener cannot be null");
688 ModelProcessingPhase finishedPhase = ModelProcessingPhase.ofExecutionOrder(executionOrder);
689 while (finishedPhase != null) {
690 if (phase.equals(finishedPhase)) {
691 listener.phaseFinished(this, finishedPhase);
694 finishedPhase = finishedPhase.getPreviousPhase();
696 if (phaseListeners.isEmpty()) {
697 phaseListeners = newMultimap();
700 phaseListeners.put(phase, listener);
704 * Adds a {@link ContextMutation} to a {@link ModelProcessingPhase}.
706 * @throws IllegalStateException when the mutation was registered after phase was completed
708 final void addMutation(final ModelProcessingPhase phase, final ContextMutation mutation) {
709 checkState(executionOrder < phase.executionOrder(), "Mutation registered after phase was completed at: %s",
712 if (phaseMutation.isEmpty()) {
713 phaseMutation = newMultimap();
715 phaseMutation.put(phase, mutation);
718 final void removeMutation(final ModelProcessingPhase phase, final ContextMutation mutation) {
719 if (!phaseMutation.isEmpty()) {
720 phaseMutation.remove(phase, mutation);
721 cleanupPhaseMutation();
726 public <K, KT extends K, N extends StatementNamespace<K, ?, ?>> void addContext(final Class<@NonNull N> namespace,
727 final KT key,final StmtContext<?, ?, ?> stmt) {
728 addContextToNamespace(namespace, key, stmt);
732 public Optional<? extends Mutable<?, ?, ?>> copyAsChildOf(final Mutable<?, ?, ?> parent, final CopyType type,
733 final QNameModule targetModule) {
734 checkEffectiveModelCompleted(this);
735 return Optional.ofNullable(copyAsChildOfImpl(parent, type, targetModule));
738 private ReactorStmtCtx<A, D, E> copyAsChildOfImpl(final Mutable<?, ?, ?> parent, final CopyType type,
739 final QNameModule targetModule) {
740 final StatementSupport<A, D, E> support = definition.support();
741 final CopyPolicy policy = support.copyPolicy();
744 return replicaAsChildOf(parent);
745 case CONTEXT_INDEPENDENT:
746 if (allSubstatementsContextIndependent()) {
747 return replicaAsChildOf(parent);
753 return (ReactorStmtCtx<A, D, E>) parent.childCopyOf(this, type, targetModule);
757 throw new IllegalStateException("Statement " + support.getPublicView() + " should never be copied");
759 throw new IllegalStateException("Unhandled policy " + policy);
764 final ReactorStmtCtx<?, ?, ?> asEffectiveChildOf(final StatementContextBase<?, ?, ?> parent, final CopyType type,
765 final QNameModule targetModule) {
766 final ReactorStmtCtx<A, D, E> copy = copyAsChildOfImpl(parent, type, targetModule);
768 // The statement fizzled, this should never happen, perhaps a verify()?
772 parent.ensureCompletedPhase(copy);
773 return canReuseCurrent(copy) ? this : copy;
776 private boolean canReuseCurrent(final ReactorStmtCtx<A, D, E> copy) {
777 // Defer to statement factory to see if we can reuse this object. If we can and have only context-independent
778 // substatements we can reuse the object. More complex cases are handled indirectly via the copy.
779 return definition.getFactory().canReuseCurrent(copy, this, buildEffective().effectiveSubstatements())
780 && allSubstatementsContextIndependent();
784 public final Mutable<?, ?, ?> childCopyOf(final StmtContext<?, ?, ?> stmt, final CopyType type,
785 final QNameModule targetModule) {
786 checkEffectiveModelCompleted(stmt);
787 checkArgument(stmt instanceof StatementContextBase, "Unsupported statement %s", stmt);
788 return childCopyOf((StatementContextBase<?, ?, ?>) stmt, type, targetModule);
791 private <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> Mutable<X, Y, Z> childCopyOf(
792 final StatementContextBase<X, Y, Z> original, final CopyType type, final QNameModule targetModule) {
793 final Optional<StatementSupport<?, ?, ?>> implicitParent = definition.getImplicitParentFor(
794 original.publicDefinition());
796 final StatementContextBase<X, Y, Z> result;
797 final InferredStatementContext<X, Y, Z> copy;
799 if (implicitParent.isPresent()) {
800 final StatementDefinitionContext<?, ?, ?> def = new StatementDefinitionContext<>(implicitParent.get());
801 result = new SubstatementContext(this, def, original.sourceReference(), original.rawArgument(),
802 original.argument(), type);
804 final CopyType childCopyType;
806 case ADDED_BY_AUGMENTATION:
807 childCopyType = CopyType.ORIGINAL;
809 case ADDED_BY_USES_AUGMENTATION:
810 childCopyType = CopyType.ADDED_BY_USES;
815 childCopyType = type;
818 copy = new InferredStatementContext<>(result, original, childCopyType, type, targetModule);
819 result.addEffectiveSubstatement(copy);
821 result = copy = new InferredStatementContext<>(this, original, type, type, targetModule);
824 original.definition.onStatementAdded(copy);
829 final ReplicaStatementContext<A, D, E> replicaAsChildOf(final StatementContextBase<?, ?, ?> parent) {
830 return new ReplicaStatementContext<>(parent, this);
833 private static void checkEffectiveModelCompleted(final StmtContext<?, ?, ?> stmt) {
834 final ModelProcessingPhase phase = stmt.getCompletedPhase();
835 checkState(phase == ModelProcessingPhase.EFFECTIVE_MODEL,
836 "Attempted to copy statement %s which has completed phase %s", stmt, phase);
840 public final boolean hasImplicitParentSupport() {
841 return definition.getFactory() instanceof ImplicitParentAwareStatementSupport;
845 public final StatementContextBase<?, ?, ?> wrapWithImplicit(final StatementContextBase<?, ?, ?> original) {
846 final Optional<StatementSupport<?, ?, ?>> optImplicit = definition.getImplicitParentFor(
847 original.publicDefinition());
848 if (optImplicit.isEmpty()) {
852 final StatementDefinitionContext<?, ?, ?> def = new StatementDefinitionContext<>(optImplicit.get());
853 final CopyType type = original.history().getLastOperation();
854 final SubstatementContext<?, ?, ?> result = new SubstatementContext(original.getParentContext(), def,
855 original.sourceReference(), original.rawArgument(), original.argument(), type);
857 result.addEffectiveSubstatement(original.reparent(result));
858 result.setCompletedPhase(original.getCompletedPhase());
862 abstract StatementContextBase<A, D, E> reparent(StatementContextBase<?, ?, ?> newParent);
865 * Indicate that the set of substatements is empty. This is a preferred shortcut to substatement stream filtering.
867 * @return True if {@link #allSubstatements()} and {@link #allSubstatementsStream()} would return an empty stream.
869 abstract boolean hasEmptySubstatements();