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.base.VerifyException;
17 import com.google.common.collect.ImmutableCollection;
18 import com.google.common.collect.ImmutableList;
19 import com.google.common.collect.ImmutableMultimap;
20 import com.google.common.collect.Multimap;
21 import com.google.common.collect.Multimaps;
22 import java.util.ArrayList;
23 import java.util.Collection;
24 import java.util.Collections;
25 import java.util.EnumMap;
26 import java.util.EventListener;
27 import java.util.Iterator;
28 import java.util.List;
29 import java.util.Map.Entry;
30 import java.util.Optional;
31 import java.util.stream.Stream;
32 import org.eclipse.jdt.annotation.NonNull;
33 import org.eclipse.jdt.annotation.Nullable;
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.meta.UndeclaredStatementFactory;
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 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);
99 // Bottom 4 bits, encoding a CopyHistory, aight?
100 private static final byte COPY_ORIGINAL = 0x00;
101 private static final byte COPY_LAST_TYPE_MASK = 0x03;
102 @Deprecated(since = "7.0.9", forRemoval = true)
103 private static final byte COPY_ADDED_BY_USES = 0x04;
104 private static final byte COPY_ADDED_BY_AUGMENTATION = 0x08;
106 // Top four bits, of which we define the topmost two to 0. We use the bottom two to encode last CopyType, aight?
107 private static final int COPY_CHILD_TYPE_SHIFT = 4;
109 private static final CopyType @NonNull [] COPY_TYPE_VALUES = CopyType.values();
112 final int copyTypes = COPY_TYPE_VALUES.length;
113 // This implies CopyType.ordinal() is <= COPY_TYPE_MASK
114 verify(copyTypes == COPY_LAST_TYPE_MASK + 1, "Unexpected %s CopyType values", copyTypes);
118 * 8 bits worth of instance storage. This is treated as a constant bit field with following structure:
127 * The four allocated fields are:
129 * <li>{@code lst}, encoding the four states corresponding to {@link CopyHistory#getLastOperation()}</li>
130 * <li>{@code u}, encoding {@link #isAddedByUses()}</li>
131 * <li>{@code a}, encoding {@link #isAugmenting()}</li>
132 * <li>{@code cct} encoding {@link #childCopyType()}</li>
134 * We still have two unused bits.
136 private final byte bitsAight;
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 // TODO: consider keying by Byte equivalent of ExecutionOrder
143 private Multimap<ModelProcessingPhase, OnPhaseFinished> phaseListeners = ImmutableMultimap.of();
144 private Multimap<ModelProcessingPhase, ContextMutation> phaseMutation = ImmutableMultimap.of();
146 private List<StmtContext<?, ?, ?>> effectOfStatement = ImmutableList.of();
149 * {@link ModelProcessingPhase.ExecutionOrder} value of current {@link ModelProcessingPhase} of this statement.
151 private byte executionOrder;
153 // TODO: we a single byte of alignment shadow left, we should think how we can use it to cache information we build
154 // during InferredStatementContext.tryToReusePrototype(). We usually end up being routed to
155 // copyAsChildOfImpl() -- which performs an eager instantiation and checks for changes afterwards. We should
156 // be able to capture how parent scope affects the copy in a few bits. If we can do that, than we can reap
157 // the benefits by just examining new parent context and old parent context contribution to the state. If
158 // their impact is the same, we can skip instantiation of statements and directly reuse them (individually,
159 // or as a complete file).
161 // Whatever we end up tracking, we need to track two views of that -- for the statement itself
162 // (sans substatements) and a summary of substatements. I think it should be possible to get this working
163 // with 2x5bits -- we have up to 15 mutable bits available if we share the field with implicitDeclaredFlag.
165 // Copy constructor used by subclasses to implement reparent()
166 StatementContextBase(final StatementContextBase<A, D, E> original) {
168 this.bitsAight = original.bitsAight;
169 this.definition = original.definition;
170 this.executionOrder = original.executionOrder;
173 StatementContextBase(final StatementDefinitionContext<A, D, E> def) {
174 this.definition = requireNonNull(def);
175 this.bitsAight = COPY_ORIGINAL;
178 StatementContextBase(final StatementDefinitionContext<A, D, E> def, final CopyType copyType) {
179 this.definition = requireNonNull(def);
180 this.bitsAight = (byte) copyFlags(copyType);
183 StatementContextBase(final StatementContextBase<A, D, E> prototype, final CopyType copyType,
184 final CopyType childCopyType) {
185 this.definition = prototype.definition;
186 this.bitsAight = (byte) (copyFlags(copyType)
187 | prototype.bitsAight & ~COPY_LAST_TYPE_MASK | childCopyType.ordinal() << COPY_CHILD_TYPE_SHIFT);
190 private static int copyFlags(final CopyType copyType) {
191 return historyFlags(copyType) | copyType.ordinal();
194 private static byte historyFlags(final CopyType copyType) {
196 case ADDED_BY_AUGMENTATION:
197 return COPY_ADDED_BY_AUGMENTATION;
199 return COPY_ADDED_BY_USES;
200 case ADDED_BY_USES_AUGMENTATION:
201 return COPY_ADDED_BY_AUGMENTATION | COPY_ADDED_BY_USES;
203 return COPY_ORIGINAL;
205 throw new VerifyException("Unhandled type " + copyType);
210 public final Collection<? extends StmtContext<?, ?, ?>> getEffectOfStatement() {
211 return effectOfStatement;
215 public final void addAsEffectOfStatement(final Collection<? extends StmtContext<?, ?, ?>> ctxs) {
216 if (ctxs.isEmpty()) {
220 if (effectOfStatement.isEmpty()) {
221 effectOfStatement = new ArrayList<>(ctxs.size());
223 effectOfStatement.addAll(ctxs);
227 // CopyHistory integration
231 public final CopyHistory history() {
236 @Deprecated(since = "7.0.9", forRemoval = true)
237 public final boolean isAddedByUses() {
238 return (bitsAight & COPY_ADDED_BY_USES) != 0;
242 @Deprecated(since = "8.0.0")
243 public final boolean isAugmenting() {
244 return (bitsAight & COPY_ADDED_BY_AUGMENTATION) != 0;
248 public final CopyType getLastOperation() {
249 return COPY_TYPE_VALUES[bitsAight & COPY_LAST_TYPE_MASK];
252 // This method exists only for space optimization of InferredStatementContext
253 final CopyType childCopyType() {
254 return COPY_TYPE_VALUES[bitsAight >> COPY_CHILD_TYPE_SHIFT & COPY_LAST_TYPE_MASK];
258 // Inference completion tracking
262 final byte executionOrder() {
263 return executionOrder;
266 // FIXME: this should be propagated through a correct constructor
268 final void setCompletedPhase(final ModelProcessingPhase completedPhase) {
269 this.executionOrder = completedPhase.executionOrder();
273 public final <K, V, T extends K, U extends V, N extends ParserNamespace<K, V>> void addToNs(
274 final Class<@NonNull N> type, final T key, final U value) {
275 addToNamespace(type, key, value);
278 static final Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements(
279 final List<ReactorStmtCtx<?, ?, ?>> effective) {
280 return effective instanceof ImmutableCollection ? effective : Collections.unmodifiableCollection(effective);
283 private static List<ReactorStmtCtx<?, ?, ?>> shrinkEffective(final List<ReactorStmtCtx<?, ?, ?>> effective) {
284 return effective.isEmpty() ? ImmutableList.of() : effective;
287 static final List<ReactorStmtCtx<?, ?, ?>> removeStatementFromEffectiveSubstatements(
288 final List<ReactorStmtCtx<?, ?, ?>> effective, final StatementDefinition statementDef) {
289 if (effective.isEmpty()) {
293 final Iterator<? extends StmtContext<?, ?, ?>> iterator = effective.iterator();
294 while (iterator.hasNext()) {
295 final StmtContext<?, ?, ?> next = iterator.next();
296 if (statementDef.equals(next.publicDefinition())) {
301 return shrinkEffective(effective);
304 static final List<ReactorStmtCtx<?, ?, ?>> removeStatementFromEffectiveSubstatements(
305 final List<ReactorStmtCtx<?, ?, ?>> effective, final StatementDefinition statementDef,
306 final String statementArg) {
307 if (statementArg == null) {
308 return removeStatementFromEffectiveSubstatements(effective, statementDef);
311 if (effective.isEmpty()) {
315 final Iterator<ReactorStmtCtx<?, ?, ?>> iterator = effective.iterator();
316 while (iterator.hasNext()) {
317 final Mutable<?, ?, ?> next = iterator.next();
318 if (statementDef.equals(next.publicDefinition()) && statementArg.equals(next.rawArgument())) {
323 return shrinkEffective(effective);
327 public final <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>>
328 Mutable<X, Y, Z> createUndeclaredSubstatement(final StatementSupport<X, Y, Z> support, final X arg) {
329 requireNonNull(support);
330 checkArgument(support instanceof UndeclaredStatementFactory, "Unsupported statement support %s", support);
332 final var ret = new UndeclaredStmtCtx<>(this, support, arg);
333 support.onStatementAdded(ret);
337 final List<ReactorStmtCtx<?, ?, ?>> addEffectiveSubstatement(final List<ReactorStmtCtx<?, ?, ?>> effective,
338 final Mutable<?, ?, ?> substatement) {
339 verifyStatement(substatement);
341 final List<ReactorStmtCtx<?, ?, ?>> resized = beforeAddEffectiveStatement(effective, 1);
342 final ReactorStmtCtx<?, ?, ?> stmt = (ReactorStmtCtx<?, ?, ?>) substatement;
343 ensureCompletedExecution(stmt);
348 static final void afterAddEffectiveSubstatement(final Mutable<?, ?, ?> substatement) {
349 // Undeclared statements still need to have 'onDeclarationFinished()' triggered
350 if (substatement instanceof UndeclaredStmtCtx) {
351 finishDeclaration((UndeclaredStmtCtx<?, ?, ?>) substatement);
355 // Split out to keep generics working without a warning
356 private static <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> void finishDeclaration(
357 final UndeclaredStmtCtx<X, Y, Z> substatement) {
358 substatement.definition().onDeclarationFinished(substatement, ModelProcessingPhase.FULL_DECLARATION);
362 public final void addEffectiveSubstatements(final Collection<? extends Mutable<?, ?, ?>> statements) {
363 if (!statements.isEmpty()) {
364 statements.forEach(StatementContextBase::verifyStatement);
365 addEffectiveSubstatementsImpl(statements);
369 abstract void addEffectiveSubstatementsImpl(Collection<? extends Mutable<?, ?, ?>> statements);
371 final List<ReactorStmtCtx<?, ?, ?>> addEffectiveSubstatementsImpl(final List<ReactorStmtCtx<?, ?, ?>> effective,
372 final Collection<? extends Mutable<?, ?, ?>> statements) {
373 final List<ReactorStmtCtx<?, ?, ?>> resized = beforeAddEffectiveStatement(effective, statements.size());
374 final Collection<? extends ReactorStmtCtx<?, ?, ?>> casted =
375 (Collection<? extends ReactorStmtCtx<?, ?, ?>>) statements;
376 if (executionOrder != ExecutionOrder.NULL) {
377 for (ReactorStmtCtx<?, ?, ?> stmt : casted) {
378 ensureCompletedExecution(stmt, executionOrder);
382 resized.addAll(casted);
386 abstract Iterator<ReactorStmtCtx<?, ?, ?>> effectiveChildrenToComplete();
388 // exposed for InferredStatementContext only
389 final void ensureCompletedPhase(final Mutable<?, ?, ?> stmt) {
390 verifyStatement(stmt);
391 ensureCompletedExecution((ReactorStmtCtx<?, ?, ?>) stmt);
394 // Make sure target statement has transitioned at least to our phase (if we have one). This method is just before we
395 // take allow a statement to become our substatement. This is needed to ensure that every statement tree does not
396 // contain any statements which did not complete the same phase as the root statement.
397 private void ensureCompletedExecution(final ReactorStmtCtx<?, ?, ?> stmt) {
398 if (executionOrder != ExecutionOrder.NULL) {
399 ensureCompletedExecution(stmt, executionOrder);
403 private static void ensureCompletedExecution(final ReactorStmtCtx<?, ?, ?> stmt, final byte executionOrder) {
404 verify(stmt.tryToCompletePhase(executionOrder), "Statement %s cannot complete phase %s", stmt, executionOrder);
407 private static void verifyStatement(final Mutable<?, ?, ?> stmt) {
408 verify(stmt instanceof ReactorStmtCtx, "Unexpected statement %s", stmt);
411 private List<ReactorStmtCtx<?, ?, ?>> beforeAddEffectiveStatement(final List<ReactorStmtCtx<?, ?, ?>> effective,
413 // We cannot allow statement to be further mutated.
414 // TODO: we really want to say 'not NULL and not at or after EFFECTIVE_MODEL here. This will matter if we have
415 // a phase after EFFECTIVE_MODEL
416 verify(executionOrder != ExecutionOrder.EFFECTIVE_MODEL, "Cannot modify finished statement at %s",
418 return beforeAddEffectiveStatementUnsafe(effective, toAdd);
421 final List<ReactorStmtCtx<?, ?, ?>> beforeAddEffectiveStatementUnsafe(final List<ReactorStmtCtx<?, ?, ?>> effective,
423 final ModelProcessingPhase inProgressPhase = getRoot().getSourceContext().getInProgressPhase();
424 checkState(inProgressPhase == ModelProcessingPhase.FULL_DECLARATION
425 || inProgressPhase == ModelProcessingPhase.EFFECTIVE_MODEL,
426 "Effective statement cannot be added in declared phase at: %s", sourceReference());
428 return effective.isEmpty() ? new ArrayList<>(toAdd) : effective;
432 final E createEffective() {
433 final E result = createEffective(definition.getFactory());
434 if (result instanceof MutableStatement) {
435 getRoot().addMutableStmtToSeal((MutableStatement) result);
440 abstract @NonNull E createEffective(@NonNull StatementFactory<A, D, E> factory);
443 * Return a stream of declared statements which can be built into an {@link EffectiveStatement}, as per
444 * {@link StmtContext#buildEffective()} contract.
446 * @return Stream of supported declared statements.
448 // FIXME: we really want to unify this with streamEffective(), under its name
449 abstract Stream<? extends @NonNull StmtContext<?, ?, ?>> streamDeclared();
452 * Return a stream of inferred statements which can be built into an {@link EffectiveStatement}, as per
453 * {@link StmtContext#buildEffective()} contract.
455 * @return Stream of supported effective statements.
457 // FIXME: this method is currently a misnomer, but unifying with streamDeclared() would make this accurate again
458 abstract Stream<? extends @NonNull StmtContext<?, ?, ?>> streamEffective();
461 final boolean doTryToCompletePhase(final byte targetOrder) {
462 final boolean finished = phaseMutation.isEmpty() || runMutations(targetOrder);
463 if (completeChildren(targetOrder) && finished) {
464 onPhaseCompleted(targetOrder);
470 private boolean completeChildren(final byte targetOrder) {
471 boolean finished = true;
472 for (final StatementContextBase<?, ?, ?> child : mutableDeclaredSubstatements()) {
473 finished &= child.tryToCompletePhase(targetOrder);
475 final var it = effectiveChildrenToComplete();
476 while (it.hasNext()) {
477 finished &= it.next().tryToCompletePhase(targetOrder);
482 private boolean runMutations(final byte targetOrder) {
483 final ModelProcessingPhase phase = verifyNotNull(ModelProcessingPhase.ofExecutionOrder(targetOrder));
484 final Collection<ContextMutation> openMutations = phaseMutation.get(phase);
485 return openMutations.isEmpty() || runMutations(phase, openMutations);
488 private boolean runMutations(final ModelProcessingPhase phase, final Collection<ContextMutation> openMutations) {
489 boolean finished = true;
490 final Iterator<ContextMutation> it = openMutations.iterator();
491 while (it.hasNext()) {
492 final ContextMutation current = it.next();
493 if (current.isFinished()) {
500 if (openMutations.isEmpty()) {
501 phaseMutation.removeAll(phase);
502 cleanupPhaseMutation();
507 private void cleanupPhaseMutation() {
508 if (phaseMutation.isEmpty()) {
509 phaseMutation = ImmutableMultimap.of();
514 * Occurs on end of {@link ModelProcessingPhase} of source parsing. This method must not be called with
515 * {@code executionOrder} equal to {@link ExecutionOrder#NULL}.
517 * @param phase that was to be completed (finished)
518 * @throws SourceException when an error occurred in source parsing
520 private void onPhaseCompleted(final byte completedOrder) {
521 executionOrder = completedOrder;
522 if (completedOrder == ExecutionOrder.EFFECTIVE_MODEL) {
523 // We have completed effective model, substatements are guaranteed not to change
524 summarizeSubstatementPolicy();
527 final ModelProcessingPhase phase = verifyNotNull(ModelProcessingPhase.ofExecutionOrder(completedOrder));
528 final Collection<OnPhaseFinished> listeners = phaseListeners.get(phase);
529 if (!listeners.isEmpty()) {
530 runPhaseListeners(phase, listeners);
534 private void summarizeSubstatementPolicy() {
535 if (definition().support().copyPolicy() == CopyPolicy.EXACT_REPLICA || noSensitiveSubstatements()) {
536 setAllSubstatementsContextIndependent();
541 * Determine whether any substatements are copy-sensitive as determined by {@link StatementSupport#copyPolicy()}.
542 * Only {@link CopyPolicy#CONTEXT_INDEPENDENT}, {@link CopyPolicy#EXACT_REPLICA} and {@link CopyPolicy#IGNORE} are
543 * copy-insensitive. Note that statements which are not {@link StmtContext#isSupportedToBuildEffective()} are all
544 * considered copy-insensitive.
547 * Implementations are expected to call {@link #noSensitiveSubstatements()} to actually traverse substatement sets.
549 * @return True if no substatements require copy-sensitive handling
551 abstract boolean noSensitiveSubstatements();
554 * Determine whether any of the provided substatements are context-sensitive for purposes of implementing
555 * {@link #noSensitiveSubstatements()}.
557 * @param substatements Substatements to check
558 * @return True if no substatements require context-sensitive handling
560 static boolean noSensitiveSubstatements(final Collection<? extends ReactorStmtCtx<?, ?, ?>> substatements) {
561 for (ReactorStmtCtx<?, ?, ?> stmt : substatements) {
562 if (stmt.isSupportedToBuildEffective()) {
563 if (!stmt.allSubstatementsContextIndependent()) {
564 // This is a recursive property
568 switch (stmt.definition().support().copyPolicy()) {
569 case CONTEXT_INDEPENDENT:
581 private void runPhaseListeners(final ModelProcessingPhase phase, final Collection<OnPhaseFinished> listeners) {
582 final Iterator<OnPhaseFinished> listener = listeners.iterator();
583 while (listener.hasNext()) {
584 final OnPhaseFinished next = listener.next();
585 if (next.phaseFinished(this, phase)) {
590 if (listeners.isEmpty()) {
591 phaseListeners.removeAll(phase);
592 if (phaseListeners.isEmpty()) {
593 phaseListeners = ImmutableMultimap.of();
599 final StatementDefinitionContext<A, D, E> definition() {
603 final <K, V, N extends ParserNamespace<K, V>> void onNamespaceItemAddedAction(final Class<N> type, final K key,
604 final OnNamespaceItemAdded listener) {
605 final Object potential = getFromNamespace(type, key);
606 if (potential != null) {
607 LOG.trace("Listener on {} key {} satisfied immediately", type, key);
608 listener.namespaceItemAdded(this, type, key, potential);
612 getBehaviour(type).addListener(new KeyedValueAddedListener<>(this, key) {
614 void onValueAdded(final Object value) {
615 listener.namespaceItemAdded(StatementContextBase.this, type, key, value);
620 final <K, V, N extends ParserNamespace<K, V>> void onNamespaceItemAddedAction(final Class<N> type,
621 final ModelProcessingPhase phase, final NamespaceKeyCriterion<K> criterion,
622 final OnNamespaceItemAdded listener) {
623 final Optional<Entry<K, V>> existing = getFromNamespace(type, criterion);
624 if (existing.isPresent()) {
625 final Entry<K, V> entry = existing.get();
626 LOG.debug("Listener on {} criterion {} found a pre-existing match: {}", type, criterion, entry);
627 waitForPhase(entry.getValue(), type, phase, criterion, listener);
631 final NamespaceBehaviourWithListeners<K, V, N> behaviour = getBehaviour(type);
632 behaviour.addListener(new PredicateValueAddedListener<K, V>(this) {
634 boolean onValueAdded(final K key, final V value) {
635 if (criterion.match(key)) {
636 LOG.debug("Listener on {} criterion {} matched added key {}", type, criterion, key);
637 waitForPhase(value, type, phase, criterion, listener);
646 final <K, V, N extends ParserNamespace<K, V>> void selectMatch(final Class<N> type,
647 final NamespaceKeyCriterion<K> criterion, final OnNamespaceItemAdded listener) {
648 final Optional<Entry<K, V>> optMatch = getFromNamespace(type, criterion);
649 checkState(optMatch.isPresent(), "Failed to find a match for criterion %s in namespace %s node %s", criterion,
651 final Entry<K, V> match = optMatch.get();
652 listener.namespaceItemAdded(StatementContextBase.this, type, match.getKey(), match.getValue());
655 final <K, V, N extends ParserNamespace<K, V>> void waitForPhase(final Object value, final Class<N> type,
656 final ModelProcessingPhase phase, final NamespaceKeyCriterion<K> criterion,
657 final OnNamespaceItemAdded listener) {
658 ((StatementContextBase<?, ? ,?>) value).addPhaseCompletedListener(phase,
659 (context, phaseCompleted) -> {
660 selectMatch(type, criterion, listener);
665 private <K, V, N extends ParserNamespace<K, V>> NamespaceBehaviourWithListeners<K, V, N> getBehaviour(
666 final Class<N> type) {
667 final NamespaceBehaviour<K, V, N> behaviour = getBehaviourRegistry().getNamespaceBehaviour(type);
668 checkArgument(behaviour instanceof NamespaceBehaviourWithListeners, "Namespace %s does not support listeners",
671 return (NamespaceBehaviourWithListeners<K, V, N>) behaviour;
674 private static <T> Multimap<ModelProcessingPhase, T> newMultimap() {
675 return Multimaps.newListMultimap(new EnumMap<>(ModelProcessingPhase.class), () -> new ArrayList<>(1));
679 * Adds {@link OnPhaseFinished} listener for a {@link ModelProcessingPhase} end. If the base has already completed
680 * the listener is notified immediately.
682 * @param phase requested completion phase
683 * @param listener listener to invoke
684 * @throws NullPointerException if any of the arguments is null
686 void addPhaseCompletedListener(final ModelProcessingPhase phase, final OnPhaseFinished listener) {
687 requireNonNull(phase, "Statement context processing phase cannot be null");
688 requireNonNull(listener, "Statement context phase listener cannot be null");
690 ModelProcessingPhase finishedPhase = ModelProcessingPhase.ofExecutionOrder(executionOrder);
691 while (finishedPhase != null) {
692 if (phase.equals(finishedPhase)) {
693 listener.phaseFinished(this, finishedPhase);
696 finishedPhase = finishedPhase.getPreviousPhase();
698 if (phaseListeners.isEmpty()) {
699 phaseListeners = newMultimap();
702 phaseListeners.put(phase, listener);
706 * Adds a {@link ContextMutation} to a {@link ModelProcessingPhase}.
708 * @throws IllegalStateException when the mutation was registered after phase was completed
710 final void addMutation(final ModelProcessingPhase phase, final ContextMutation mutation) {
711 checkState(executionOrder < phase.executionOrder(), "Mutation registered after phase was completed at: %s",
714 if (phaseMutation.isEmpty()) {
715 phaseMutation = newMultimap();
717 phaseMutation.put(phase, mutation);
720 final void removeMutation(final ModelProcessingPhase phase, final ContextMutation mutation) {
721 if (!phaseMutation.isEmpty()) {
722 phaseMutation.remove(phase, mutation);
723 cleanupPhaseMutation();
728 public final <K, KT extends K, N extends StatementNamespace<K, ?, ?>> void addContext(
729 final Class<@NonNull N> namespace, final KT key,final StmtContext<?, ?, ?> stmt) {
730 addContextToNamespace(namespace, key, stmt);
734 public final Optional<? extends Mutable<?, ?, ?>> copyAsChildOf(final Mutable<?, ?, ?> parent, final CopyType type,
735 final QNameModule targetModule) {
736 checkEffectiveModelCompleted(this);
737 return Optional.ofNullable(copyAsChildOfImpl(parent, type, targetModule));
740 private @Nullable ReactorStmtCtx<A, D, E> copyAsChildOfImpl(final Mutable<?, ?, ?> parent, final CopyType type,
741 final QNameModule targetModule) {
742 final StatementSupport<A, D, E> support = definition.support();
743 final CopyPolicy policy = support.copyPolicy();
746 return replicaAsChildOf(parent);
747 case CONTEXT_INDEPENDENT:
748 if (allSubstatementsContextIndependent()) {
749 return replicaAsChildOf(parent);
755 return (ReactorStmtCtx<A, D, E>) parent.childCopyOf(this, type, targetModule);
759 throw new IllegalStateException("Statement " + support.getPublicView() + " should never be copied");
761 throw new IllegalStateException("Unhandled policy " + policy);
766 final ReactorStmtCtx<?, ?, ?> asEffectiveChildOf(final StatementContextBase<?, ?, ?> parent, final CopyType type,
767 final QNameModule targetModule) {
768 final ReactorStmtCtx<A, D, E> copy = copyAsChildOfImpl(parent, type, targetModule);
770 // The statement fizzled, this should never happen, perhaps a verify()?
774 parent.ensureCompletedPhase(copy);
775 return canReuseCurrent(copy) ? this : copy;
778 private boolean canReuseCurrent(final @NonNull ReactorStmtCtx<A, D, E> copy) {
779 // Defer to statement factory to see if we can reuse this object. If we can and have only context-independent
780 // substatements we can reuse the object. More complex cases are handled indirectly via the copy.
781 return definition.getFactory().canReuseCurrent(copy, this, buildEffective().effectiveSubstatements())
782 && allSubstatementsContextIndependent();
786 public final Mutable<?, ?, ?> childCopyOf(final StmtContext<?, ?, ?> stmt, final CopyType type,
787 final QNameModule targetModule) {
788 checkEffectiveModelCompleted(stmt);
789 if (stmt instanceof StatementContextBase) {
790 return childCopyOf((StatementContextBase<?, ?, ?>) stmt, type, targetModule);
791 } else if (stmt instanceof ReplicaStatementContext) {
792 return ((ReplicaStatementContext<?, ?, ?>) stmt).replicaAsChildOf(this);
794 throw new IllegalArgumentException("Unsupported statement " + stmt);
798 private <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>> Mutable<X, Y, Z> childCopyOf(
799 final StatementContextBase<X, Y, Z> original, final CopyType type, final QNameModule targetModule) {
800 final var implicitParent = definition.getImplicitParentFor(this, original.publicDefinition());
802 final StatementContextBase<X, Y, Z> result;
803 final InferredStatementContext<X, Y, Z> copy;
805 if (implicitParent.isPresent()) {
806 result = new UndeclaredStmtCtx(this, implicitParent.orElseThrow(), original, type);
808 final CopyType childCopyType;
810 case ADDED_BY_AUGMENTATION:
811 childCopyType = CopyType.ORIGINAL;
813 case ADDED_BY_USES_AUGMENTATION:
814 childCopyType = CopyType.ADDED_BY_USES;
819 childCopyType = type;
822 copy = new InferredStatementContext<>(result, original, childCopyType, type, targetModule);
823 result.addEffectiveSubstatement(copy);
824 result.definition.onStatementAdded(result);
826 result = copy = new InferredStatementContext<>(this, original, type, type, targetModule);
829 original.definition.onStatementAdded(copy);
834 final ReplicaStatementContext<A, D, E> replicaAsChildOf(final StatementContextBase<?, ?, ?> parent) {
835 return new ReplicaStatementContext<>(parent, this);
838 private static void checkEffectiveModelCompleted(final StmtContext<?, ?, ?> stmt) {
839 final ModelProcessingPhase phase = stmt.getCompletedPhase();
840 checkState(phase == ModelProcessingPhase.EFFECTIVE_MODEL,
841 "Attempted to copy statement %s which has completed phase %s", stmt, phase);
845 public final boolean hasImplicitParentSupport() {
846 return definition.getFactory() instanceof ImplicitParentAwareStatementSupport;
850 public final StmtContext<?, ?, ?> wrapWithImplicit(final StmtContext<?, ?, ?> original) {
851 final var optImplicit = definition.getImplicitParentFor(this, original.publicDefinition());
852 if (optImplicit.isEmpty()) {
856 checkArgument(original instanceof StatementContextBase, "Unsupported original %s", original);
857 final var origBase = (StatementContextBase<?, ?, ?>)original;
859 @SuppressWarnings({ "rawtypes", "unchecked" })
860 final UndeclaredStmtCtx<?, ?, ?> result = new UndeclaredStmtCtx(origBase, optImplicit.orElseThrow());
861 result.addEffectiveSubstatement(origBase.reparent(result));
862 result.setCompletedPhase(original.getCompletedPhase());
866 abstract StatementContextBase<A, D, E> reparent(StatementContextBase<?, ?, ?> newParent);
869 * Indicate that the set of substatements is empty. This is a preferred shortcut to substatement stream filtering.
871 * @return True if {@link #allSubstatements()} and {@link #allSubstatementsStream()} would return an empty stream.
873 abstract boolean hasEmptySubstatements();