2 * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.Verify.verify;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.VerifyException;
14 import com.google.common.collect.ImmutableList;
15 import com.google.common.collect.Streams;
16 import java.util.ArrayList;
17 import java.util.Collection;
18 import java.util.HashMap;
19 import java.util.Iterator;
20 import java.util.List;
22 import java.util.Objects;
23 import java.util.Optional;
24 import java.util.stream.Collectors;
25 import java.util.stream.Stream;
26 import org.eclipse.jdt.annotation.NonNull;
27 import org.eclipse.jdt.annotation.Nullable;
28 import org.opendaylight.yangtools.concepts.Immutable;
29 import org.opendaylight.yangtools.yang.common.QName;
30 import org.opendaylight.yangtools.yang.common.QNameModule;
31 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
32 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
33 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
34 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
35 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaTreeEffectiveStatement;
36 import org.opendaylight.yangtools.yang.parser.spi.SchemaTreeNamespace;
37 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
38 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStatementStateAware;
39 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
40 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.OnDemandSchemaTreeStorageNode;
41 import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.StorageNodeType;
42 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementFactory;
43 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
44 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
45 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
46 import org.slf4j.Logger;
47 import org.slf4j.LoggerFactory;
50 * A statement which has been inferred to exist. Functionally it is equivalent to a SubstatementContext, but it is not
51 * backed by a declaration (and declared statements). It is backed by a prototype StatementContextBase and has only
52 * effective substatements, which are either transformed from that prototype or added by inference.
54 final class InferredStatementContext<A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>>
55 extends StatementContextBase<A, D, E> implements OnDemandSchemaTreeStorageNode {
56 // An effective copy view, with enough information to decide what to do next
57 private static final class EffectiveCopy implements Immutable {
59 private final ReactorStmtCtx<?, ?, ?> orig;
60 // Effective view, if the statement is to be reused it equals to orig
61 private final ReactorStmtCtx<?, ?, ?> copy;
63 EffectiveCopy(final ReactorStmtCtx<?, ?, ?> orig, final ReactorStmtCtx<?, ?, ?> copy) {
64 this.orig = requireNonNull(orig);
65 this.copy = requireNonNull(copy);
72 ReactorStmtCtx<?, ?, ?> toChildContext(final @NonNull InferredStatementContext<?, ?, ?> parent) {
73 return isReused() ? orig.replicaAsChildOf(parent) : copy;
76 ReactorStmtCtx<?, ?, ?> toReusedChild(final @NonNull InferredStatementContext<?, ?, ?> parent) {
77 verify(isReused(), "Attempted to discard copy %s", copy);
78 return orig.replicaAsChildOf(parent);
82 private static final Logger LOG = LoggerFactory.getLogger(InferredStatementContext.class);
84 // Sentinel objects for 'substatements', String is a good enough type
85 private static final @NonNull String REUSED_SUBSTATEMENTS = "reused";
86 private static final @NonNull String SWEPT_SUBSTATEMENTS = "swept";
88 private final @NonNull StatementContextBase<A, D, E> prototype;
89 private final @NonNull StatementContextBase<?, ?, ?> parent;
90 private final @NonNull StmtContext<A, D, E> originalCtx;
91 // TODO: consider encoding this in StatementContextBase fields, there should be plenty of room
92 private final @NonNull CopyType childCopyType;
93 private final QNameModule targetModule;
94 private final A argument;
97 * Effective substatements, lazily materialized. This field can have four states:
99 * <li>it can be {@code null}, in which case no materialization has taken place</li>
100 * <li>it can be a {@link HashMap}, in which case partial materialization has taken place</li>
101 * <li>it can be a {@link List}, in which case full materialization has taken place</li>
102 * <li>it can be {@link SWEPT_SUBSTATEMENTS}, in which case materialized state is no longer available</li>
105 private Object substatements;
107 private InferredStatementContext(final InferredStatementContext<A, D, E> original,
108 final StatementContextBase<?, ?, ?> parent) {
110 this.parent = requireNonNull(parent);
111 this.childCopyType = original.childCopyType;
112 this.targetModule = original.targetModule;
113 this.prototype = original.prototype;
114 this.originalCtx = original.originalCtx;
115 this.argument = original.argument;
116 // Substatements are initialized here
117 this.substatements = ImmutableList.of();
120 InferredStatementContext(final StatementContextBase<?, ?, ?> parent, final StatementContextBase<A, D, E> prototype,
121 final CopyType myCopyType, final CopyType childCopyType, final QNameModule targetModule) {
122 super(prototype, myCopyType);
123 this.parent = requireNonNull(parent);
124 this.prototype = requireNonNull(prototype);
125 this.argument = targetModule == null ? prototype.argument()
126 : prototype.definition().adaptArgumentValue(prototype, targetModule);
127 this.childCopyType = requireNonNull(childCopyType);
128 this.targetModule = targetModule;
129 this.originalCtx = prototype.getOriginalCtx().orElse(prototype);
131 // Mark prototype as blocking statement cleanup
136 public Collection<? extends StatementContextBase<?, ?, ?>> mutableDeclaredSubstatements() {
137 return ImmutableList.of();
141 public Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements() {
142 return mutableEffectiveSubstatements(ensureEffectiveSubstatements());
146 public Iterable<? extends StmtContext<?, ?, ?>> allSubstatements() {
147 // No need to concat with declared
148 return effectiveSubstatements();
152 public Stream<? extends StmtContext<?, ?, ?>> allSubstatementsStream() {
153 // No need to concat with declared
154 return effectiveSubstatements().stream();
158 public StatementSourceReference sourceReference() {
159 return originalCtx.sourceReference();
163 public String rawArgument() {
164 return originalCtx.rawArgument();
168 public Optional<StmtContext<A, D, E>> getOriginalCtx() {
169 return Optional.of(originalCtx);
173 public Optional<StmtContext<A, D, E>> getPreviousCopyCtx() {
174 return Optional.of(prototype);
178 public D declared() {
180 * Share original instance of declared statement between all effective statements which have been copied or
181 * derived from this original declared statement.
183 return originalCtx.declared();
187 public void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef) {
188 substatements = removeStatementFromEffectiveSubstatements(ensureEffectiveSubstatements(), statementDef);
192 public void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef,
193 final String statementArg) {
194 substatements = removeStatementFromEffectiveSubstatements(ensureEffectiveSubstatements(), statementDef,
199 public void addEffectiveSubstatement(final Mutable<?, ?, ?> substatement) {
200 substatements = addEffectiveSubstatement(ensureEffectiveSubstatements(), substatement);
204 void addEffectiveSubstatementsImpl(final Collection<? extends Mutable<?, ?, ?>> statements) {
205 substatements = addEffectiveSubstatementsImpl(ensureEffectiveSubstatements(), statements);
209 InferredStatementContext<A, D, E> reparent(final StatementContextBase<?, ?, ?> newParent) {
210 return new InferredStatementContext<>(this, newParent);
214 E createEffective(final StatementFactory<A, D, E> factory) {
215 // If we have not materialized we do not have a difference in effective substatements, hence we can forward
216 // towards the source of the statement.
217 accessSubstatements();
218 return substatements == null ? tryToReusePrototype(factory) : super.createEffective(factory);
221 private @NonNull E tryToReusePrototype(final StatementFactory<A, D, E> factory) {
222 final E origEffective = prototype.buildEffective();
223 final Collection<? extends @NonNull EffectiveStatement<?, ?>> origSubstatements =
224 origEffective.effectiveSubstatements();
226 // First check if we can reuse the entire prototype
227 if (!factory.canReuseCurrent(this, prototype, origSubstatements)) {
228 return deduplicate(tryToReuseSubstatements(factory, origEffective));
231 // We can reuse this statement let's see if all statements agree...
232 // ... no substatements to deal with, we can freely reuse the original
233 if (origSubstatements.isEmpty()) {
234 LOG.debug("Reusing empty: {}", origEffective);
235 substatements = ImmutableList.of();
237 return origEffective;
240 // ... all are context independent, reuse the original
241 if (allSubstatementsContextIndependent()) {
242 LOG.debug("Reusing context-independent: {}", origEffective);
243 substatements = noRefs() ? REUSED_SUBSTATEMENTS : reusePrototypeReplicas();
245 return origEffective;
248 // ... copy-sensitive check
249 final List<EffectiveCopy> declCopy = prototype.streamDeclared()
250 .map(sub -> effectiveCopy((ReactorStmtCtx<?, ?, ?>) sub))
251 .filter(Objects::nonNull)
252 .collect(Collectors.toUnmodifiableList());
253 final List<EffectiveCopy> effCopy = prototype.streamEffective()
254 .map(sub -> effectiveCopy((ReactorStmtCtx<?, ?, ?>) sub))
255 .filter(Objects::nonNull)
256 .collect(Collectors.toUnmodifiableList());
258 // ... are any copy-sensitive?
259 if (allReused(declCopy) && allReused(effCopy)) {
260 LOG.debug("Reusing after substatement check: {}", origEffective);
261 substatements = noRefs() ? REUSED_SUBSTATEMENTS
262 : reusePrototypeReplicas(Streams.concat(declCopy.stream(), effCopy.stream())
263 .map(copy -> copy.toReusedChild(this)));
265 return origEffective;
268 // *sigh*, ok, heavy lifting through a shallow copy
269 final List<ReactorStmtCtx<?, ?, ?>> declared = declCopy.stream()
270 .map(copy -> copy.toChildContext(this))
271 .collect(ImmutableList.toImmutableList());
272 final List<ReactorStmtCtx<?, ?, ?>> effective = effCopy.stream()
273 .map(copy -> copy.toChildContext(this))
274 .collect(ImmutableList.toImmutableList());
275 substatements = declared.isEmpty() ? effective
276 : Streams.concat(declared.stream(), effective.stream()).collect(ImmutableList.toImmutableList());
279 // Values are the effective copies, hence this efficiently deals with recursion.
280 return deduplicate(factory.createEffective(this, declared.stream(), effective.stream()));
283 private @NonNull E tryToReuseSubstatements(final StatementFactory<A, D, E> factory, final @NonNull E original) {
284 if (allSubstatementsContextIndependent()) {
285 LOG.debug("Reusing substatements of: {}", prototype);
286 substatements = noRefs() ? REUSED_SUBSTATEMENTS : reusePrototypeReplicas();
288 return factory.copyEffective(this, original);
291 // Fall back to full instantiation, which populates our substatements. Then check if we should be reusing
292 // the substatement list, as this operation turned out to not affect them.
293 final E effective = super.createEffective(factory);
294 // Since we have forced instantiation to deal with this case, we also need to reset the 'modified' flag
297 if (sameSubstatements(original.effectiveSubstatements(), effective)) {
298 LOG.debug("Reusing unchanged substatements of: {}", prototype);
299 return factory.copyEffective(this, original);
304 private @NonNull E deduplicate(final @NonNull E effective) {
305 if (effective instanceof EffectiveStatementStateAware) {
306 final ReactorStmtCtx<A, D, E> source = unmodifiedEffectiveSource();
307 if (source != this) {
308 return source.attachCopy(((EffectiveStatementStateAware) effective).toEffectiveStatementState(),
315 private List<ReactorStmtCtx<?, ?, ?>> reusePrototypeReplicas() {
316 return reusePrototypeReplicas(Streams.concat(prototype.streamDeclared(), prototype.streamEffective()));
319 private List<ReactorStmtCtx<?, ?, ?>> reusePrototypeReplicas(final Stream<StmtContext<?, ?, ?>> stream) {
322 final ReplicaStatementContext<?, ?, ?> ret = ((ReactorStmtCtx<?, ?, ?>) stmt).replicaAsChildOf(this);
323 ret.buildEffective();
326 .collect(Collectors.toUnmodifiableList());
329 private static boolean sameSubstatements(final Collection<?> original, final EffectiveStatement<?, ?> effective) {
330 final Collection<?> copied = effective.effectiveSubstatements();
331 if (copied != effective.effectiveSubstatements() || original.size() != copied.size()) {
332 // Do not bother if result is treating substatements as transient
336 final Iterator<?> oit = original.iterator();
337 final Iterator<?> cit = copied.iterator();
338 while (oit.hasNext()) {
339 verify(cit.hasNext());
340 // Identity comparison on purpose to side-step whatever equality there might be. We want to reuse instances
342 if (oit.next() != cit.next()) {
346 verify(!cit.hasNext());
350 private static boolean allReused(final List<EffectiveCopy> entries) {
351 return entries.stream().allMatch(EffectiveCopy::isReused);
355 ReactorStmtCtx<A, D, E> unmodifiedEffectiveSource() {
356 return isModified() ? this : prototype.unmodifiedEffectiveSource();
360 boolean hasEmptySubstatements() {
361 if (substatements == null) {
362 return prototype.hasEmptySubstatements();
364 return substatements instanceof HashMap ? false : ((List<?>) substatements).isEmpty();
368 boolean noSensitiveSubstatements() {
369 accessSubstatements();
370 if (substatements == null) {
371 // No difference, defer to prototype
372 return prototype.allSubstatementsContextIndependent();
374 if (substatements instanceof List) {
375 // Fully materialized, walk all statements
376 return noSensitiveSubstatements(castEffective(substatements));
379 // Partially-materialized. This case has three distinct outcomes:
380 // - prototype does not have a sensitive statement (1)
381 // - protype has a sensitive substatement, and
382 // - we have not marked is as unsupported (2)
383 // - we have marked it as unsupported (3)
385 // Determining the outcome between (2) and (3) is a bother, this check errs on the side of false negative side
386 // and treats (3) as (2) -- i.e. even if we marked a sensitive statement as unsupported, we still consider it
387 // as affecting the result.
388 return prototype.allSubstatementsContextIndependent()
389 && noSensitiveSubstatements(castMaterialized(substatements).values());
393 <X, Z extends EffectiveStatement<X, ?>> @NonNull Optional<X> findSubstatementArgumentImpl(
394 final @NonNull Class<Z> type) {
395 if (substatements instanceof List) {
396 return super.findSubstatementArgumentImpl(type);
399 final Optional<X> templateArg = prototype.findSubstatementArgument(type);
400 if (templateArg.isEmpty()) {
403 if (SchemaTreeEffectiveStatement.class.isAssignableFrom(type)) {
404 // X is known to be QName
405 return (Optional<X>) templateArg.map(template -> ((QName) template).bindTo(targetModule));
411 boolean hasSubstatementImpl(final @NonNull Class<? extends EffectiveStatement<?, ?>> type) {
412 return substatements instanceof List ? super.hasSubstatementImpl(type)
413 // We do not allow deletion of partially-materialized statements, hence this is accurate
414 : prototype.hasSubstatement(type);
418 public <Y extends DeclaredStatement<QName>, Z extends SchemaTreeEffectiveStatement<Y>>
419 StmtContext<QName, Y, Z> requestSchemaTreeChild(final QName qname) {
420 if (substatements instanceof List) {
421 // We have performed materialization, hence we have triggered creation of all our schema tree child
426 final QName templateQName = qname.bindTo(StmtContextUtils.getRootModuleQName(prototype));
427 LOG.debug("Materializing child {} from {}", qname, templateQName);
429 final StmtContext<?, ?, ?> template;
430 if (prototype instanceof InferredStatementContext) {
431 // Note: we need to access namespace here, as the target statement may have already been populated, in which
432 // case we want to obtain the statement in local namespace storage.
433 template = (StmtContext) ((InferredStatementContext<?, ?, ?>) prototype).getFromNamespace(
434 SchemaTreeNamespace.class, templateQName);
436 template = prototype.allSubstatementsStream()
437 .filter(stmt -> stmt.producesEffective(SchemaTreeEffectiveStatement.class)
438 && templateQName.equals(stmt.argument()))
443 if (template == null) {
444 // We do not have a template, this child does not exist. It may be added later, but that is someone else's
446 LOG.debug("Child {} does not have a template", qname);
450 @SuppressWarnings("unchecked")
451 final Mutable<QName, Y, Z> ret = (Mutable<QName, Y, Z>) copySubstatement((Mutable<?, ?, ?>) template)
453 () -> new InferenceException(this, "Failed to materialize child %s template %s", qname, template));
454 ensureCompletedPhase(ret);
455 addMaterialized(template, ret);
457 LOG.debug("Child {} materialized", qname);
461 // Instantiate this statement's effective substatements. Note this method has side-effects in namespaces and overall
462 // BuildGlobalContext, hence it must be called at most once.
463 private List<ReactorStmtCtx<?, ?, ?>> ensureEffectiveSubstatements() {
464 accessSubstatements();
465 return substatements instanceof List ? castEffective(substatements)
466 : initializeSubstatements(castMaterialized(substatements));
470 Iterable<ReactorStmtCtx<?, ?, ?>> effectiveChildrenToComplete() {
471 // When we have not initialized, there are no statements to catch up: we will catch up when we are copying
472 // from prototype (which is already at ModelProcessingPhase.EFFECTIVE_MODEL).
473 if (substatements == null) {
474 return ImmutableList.of();
476 accessSubstatements();
477 if (substatements instanceof HashMap) {
478 return castMaterialized(substatements).values();
480 return castEffective(substatements);
485 Stream<? extends @NonNull StmtContext<?, ?, ?>> streamDeclared() {
486 return Stream.empty();
490 Stream<? extends @NonNull StmtContext<?, ?, ?>> streamEffective() {
491 return ensureEffectiveSubstatements().stream().filter(StmtContext::isSupportedToBuildEffective);
494 private void accessSubstatements() {
495 if (substatements instanceof String) {
496 throw new VerifyException("Access to " + substatements + " substatements of " + this);
501 void markNoParentRef() {
502 final Object local = substatements;
504 markNoParentRef(castEffective(local));
509 int sweepSubstatements() {
510 final Object local = substatements;
511 substatements = SWEPT_SUBSTATEMENTS;
513 if (local instanceof List) {
514 final List<ReactorStmtCtx<?, ?, ?>> list = castEffective(local);
516 count = countUnswept(list);
521 private List<ReactorStmtCtx<?, ?, ?>> initializeSubstatements(
522 final Map<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree) {
523 final Collection<? extends StatementContextBase<?, ?, ?>> declared = prototype.mutableDeclaredSubstatements();
524 final Collection<? extends Mutable<?, ?, ?>> effective = prototype.mutableEffectiveSubstatements();
526 final List<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
527 for (final Mutable<?, ?, ?> stmtContext : declared) {
528 if (stmtContext.isSupportedByFeatures()) {
529 copySubstatement(stmtContext, buffer, materializedSchemaTree);
532 for (final Mutable<?, ?, ?> stmtContext : effective) {
533 copySubstatement(stmtContext, buffer, materializedSchemaTree);
536 final List<ReactorStmtCtx<?, ?, ?>> ret = beforeAddEffectiveStatementUnsafe(ImmutableList.of(), buffer.size());
537 ret.addAll((Collection) buffer);
546 // Statement copy mess starts here. As it turns out, it's not that much of a mess, but it does make your head spin
547 // sometimes. Tread softly because you tread on my dreams.
550 private EffectiveCopy effectiveCopy(final ReactorStmtCtx<?, ?, ?> stmt) {
551 final ReactorStmtCtx<?, ?, ?> effective = stmt.asEffectiveChildOf(this, childCopyType, targetModule);
552 return effective == null ? null : new EffectiveCopy(stmt, effective);
555 private void copySubstatement(final Mutable<?, ?, ?> substatement, final Collection<Mutable<?, ?, ?>> buffer,
556 final Map<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree) {
557 // Consult materialized substatements. We are in a copy operation and will end up throwing materialized
558 // statements away -- hence we do not perform Map.remove() to save ourselves a mutation operation.
560 // We could also perform a Map.containsKey() and perform a bulk add, but that would mean the statement order
561 // against parent would change -- and we certainly do not want that to happen.
562 final ReactorStmtCtx<?, ?, ?> materialized = findMaterialized(materializedSchemaTree, substatement);
563 if (materialized == null) {
564 copySubstatement(substatement).ifPresent(copy -> {
565 ensureCompletedPhase(copy);
569 buffer.add(materialized);
573 private Optional<? extends Mutable<?, ?, ?>> copySubstatement(final Mutable<?, ?, ?> substatement) {
574 return substatement.copyAsChildOf(this, childCopyType, targetModule);
577 private void addMaterialized(final StmtContext<?, ?, ?> template, final Mutable<?, ?, ?> copy) {
578 final HashMap<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree;
579 if (substatements == null) {
580 // Lazy initialization of backing map. We do not expect this to be used often or multiple times -- each hit
581 // here means an inference along schema tree, such as deviate/augment. HashMap requires power-of-two and
582 // defaults to 0.75 load factor -- we therefore size it to 4, i.e. next two inserts will not cause a
583 // resizing operation.
584 materializedSchemaTree = new HashMap<>(4);
585 substatements = materializedSchemaTree;
588 verify(substatements instanceof HashMap, "Unexpected substatements %s", substatements);
589 materializedSchemaTree = castMaterialized(substatements);
592 final StmtContext<?, ?, ?> existing = materializedSchemaTree.put(template,
593 (StatementContextBase<?, ?, ?>) copy);
594 if (existing != null) {
595 throw new VerifyException(
596 "Unexpected duplicate request for " + copy.argument() + " previous result was " + existing);
600 private static @Nullable ReactorStmtCtx<?, ?, ?> findMaterialized(
601 final Map<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree,
602 final StmtContext<?, ?, ?> template) {
603 return materializedSchemaTree == null ? null : materializedSchemaTree.get(template);
606 @SuppressWarnings("unchecked")
607 private static List<ReactorStmtCtx<?, ?, ?>> castEffective(final Object substatements) {
608 return (List<ReactorStmtCtx<?, ?, ?>>) substatements;
611 @SuppressWarnings("unchecked")
612 private static HashMap<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> castMaterialized(final Object substatements) {
613 return (HashMap<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>>) substatements;
616 // Statement copy mess ends here
619 * KEEP THINGS ORGANIZED!
621 * below methods exist in the same form in SubstatementContext. If any adjustment is made here, make sure it is
622 * properly updated there.
626 public SchemaPath schemaPath() {
627 return substatementGetSchemaPath();
631 public A argument() {
636 public StatementContextBase<?, ?, ?> getParentContext() {
641 public StorageNodeType getStorageNodeType() {
642 return StorageNodeType.STATEMENT_LOCAL;
646 public StatementContextBase<?, ?, ?> getParentNamespaceStorage() {
651 public RootStatementContext<?, ?, ?> getRoot() {
652 return parent.getRoot();
656 public EffectiveConfig effectiveConfig() {
657 return effectiveConfig(parent);
661 protected boolean isIgnoringIfFeatures() {
662 return isIgnoringIfFeatures(parent);
666 protected boolean isIgnoringConfig() {
667 return isIgnoringConfig(parent);
671 protected boolean isParentSupportedByFeatures() {
672 return parent.isSupportedByFeatures();