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.Collections;
19 import java.util.HashMap;
20 import java.util.Iterator;
21 import java.util.List;
23 import java.util.Objects;
24 import java.util.Optional;
25 import java.util.stream.Collectors;
26 import java.util.stream.Stream;
27 import org.eclipse.jdt.annotation.NonNull;
28 import org.eclipse.jdt.annotation.Nullable;
29 import org.opendaylight.yangtools.concepts.Immutable;
30 import org.opendaylight.yangtools.yang.common.QName;
31 import org.opendaylight.yangtools.yang.common.QNameModule;
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.EffectiveStatementState;
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 ReactorStmtCtx<A, D, E> originalCtx;
91 private final QNameModule targetModule;
92 private final A argument;
95 * Effective substatements, lazily materialized. This field can have four states:
97 * <li>it can be {@code null}, in which case no materialization has taken place</li>
98 * <li>it can be a {@link HashMap}, in which case partial materialization has taken place</li>
99 * <li>it can be a {@link List}, in which case full materialization has taken place</li>
100 * <li>it can be {@link SWEPT_SUBSTATEMENTS}, in which case materialized state is no longer available</li>
103 private Object substatements;
105 private InferredStatementContext(final InferredStatementContext<A, D, E> original,
106 final StatementContextBase<?, ?, ?> parent) {
108 this.parent = requireNonNull(parent);
109 this.targetModule = original.targetModule;
110 this.prototype = original.prototype;
111 this.originalCtx = original.originalCtx;
112 this.argument = original.argument;
113 // Substatements are initialized here
114 this.substatements = ImmutableList.of();
117 InferredStatementContext(final StatementContextBase<?, ?, ?> parent, final StatementContextBase<A, D, E> prototype,
118 final CopyType myCopyType, final CopyType childCopyType, final QNameModule targetModule) {
119 super(prototype, myCopyType, childCopyType);
120 this.parent = requireNonNull(parent);
121 this.prototype = requireNonNull(prototype);
122 this.argument = targetModule == null ? prototype.argument()
123 : prototype.definition().adaptArgumentValue(prototype, targetModule);
124 this.targetModule = targetModule;
126 final var origCtx = prototype.getOriginalCtx().orElse(prototype);
127 verify(origCtx instanceof ReactorStmtCtx, "Unexpected original %s", origCtx);
128 this.originalCtx = (ReactorStmtCtx<A, D, E>) origCtx;
130 // Mark prototype as blocking statement cleanup
135 public Collection<? extends StatementContextBase<?, ?, ?>> mutableDeclaredSubstatements() {
136 return ImmutableList.of();
140 public Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements() {
141 return mutableEffectiveSubstatements(ensureEffectiveSubstatements());
145 public Iterable<? extends @NonNull StmtContext<?, ?, ?>> allSubstatements() {
146 // No need to concat with declared
147 return effectiveSubstatements();
151 public Stream<? extends @NonNull StmtContext<?, ?, ?>> allSubstatementsStream() {
152 // No need to concat with declared
153 return effectiveSubstatements().stream();
157 public StatementSourceReference sourceReference() {
158 return originalCtx.sourceReference();
162 public String rawArgument() {
163 return originalCtx.rawArgument();
167 public Optional<StmtContext<A, D, E>> getOriginalCtx() {
168 return Optional.of(originalCtx);
172 public Optional<StmtContext<A, D, E>> getPreviousCopyCtx() {
173 return Optional.of(prototype);
177 public D declared() {
179 * Share original instance of declared statement between all effective statements which have been copied or
180 * derived from this original declared statement.
182 return originalCtx.declared();
186 public void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef) {
187 substatements = removeStatementFromEffectiveSubstatements(ensureEffectiveSubstatements(), statementDef);
191 public void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef,
192 final String statementArg) {
193 substatements = removeStatementFromEffectiveSubstatements(ensureEffectiveSubstatements(), statementDef,
198 public void addEffectiveSubstatement(final Mutable<?, ?, ?> substatement) {
199 substatements = addEffectiveSubstatement(ensureEffectiveSubstatements(), substatement);
200 afterAddEffectiveSubstatement(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) : createInferredEffective(factory);
221 private @NonNull E createInferredEffective(final @NonNull StatementFactory<A, D, E> factory) {
222 return createInferredEffective(factory, this, streamDeclared(), streamEffective());
226 E createInferredEffective(final StatementFactory<A, D, E> factory, final InferredStatementContext<A, D, E> ctx,
227 final Stream<? extends StmtContext<?, ?, ?>> declared,
228 final Stream<? extends StmtContext<?, ?, ?>> effective) {
229 return originalCtx.createInferredEffective(factory, ctx, declared, effective);
232 private @NonNull E tryToReusePrototype(final @NonNull StatementFactory<A, D, E> factory) {
233 final E origEffective = prototype.buildEffective();
234 final Collection<? extends @NonNull EffectiveStatement<?, ?>> origSubstatements =
235 origEffective.effectiveSubstatements();
237 // First check if we can reuse the entire prototype
238 if (!factory.canReuseCurrent(this, prototype, origSubstatements)) {
239 return internAlongCopyAxis(factory, tryToReuseSubstatements(factory, origEffective));
242 // We can reuse this statement let's see if all statements agree...
243 // ... no substatements to deal with, we can freely reuse the original
244 if (origSubstatements.isEmpty()) {
245 LOG.debug("Reusing empty: {}", origEffective);
246 substatements = ImmutableList.of();
248 return origEffective;
251 // ... all are context independent, reuse the original
252 if (allSubstatementsContextIndependent()) {
253 LOG.debug("Reusing context-independent: {}", origEffective);
254 substatements = noRefs() ? REUSED_SUBSTATEMENTS : reusePrototypeReplicas();
256 return origEffective;
259 // ... copy-sensitive check
260 final List<EffectiveCopy> declCopy = prototype.streamDeclared()
261 .map(sub -> effectiveCopy((ReactorStmtCtx<?, ?, ?>) sub))
262 .filter(Objects::nonNull)
263 .collect(Collectors.toUnmodifiableList());
264 final List<EffectiveCopy> effCopy = prototype.streamEffective()
265 .map(sub -> effectiveCopy((ReactorStmtCtx<?, ?, ?>) sub))
266 .filter(Objects::nonNull)
267 .collect(Collectors.toUnmodifiableList());
269 // ... are any copy-sensitive?
270 if (allReused(declCopy) && allReused(effCopy)) {
271 LOG.debug("Reusing after substatement check: {}", origEffective);
272 substatements = noRefs() ? REUSED_SUBSTATEMENTS
273 : reusePrototypeReplicas(Streams.concat(declCopy.stream(), effCopy.stream())
274 .map(copy -> copy.toReusedChild(this)));
276 return origEffective;
279 // *sigh*, ok, heavy lifting through a shallow copy
280 final List<ReactorStmtCtx<?, ?, ?>> declared = declCopy.stream()
281 .map(copy -> copy.toChildContext(this))
282 .collect(ImmutableList.toImmutableList());
283 final List<ReactorStmtCtx<?, ?, ?>> effective = effCopy.stream()
284 .map(copy -> copy.toChildContext(this))
285 .collect(ImmutableList.toImmutableList());
286 substatements = declared.isEmpty() ? effective
287 : Streams.concat(declared.stream(), effective.stream()).collect(ImmutableList.toImmutableList());
290 // Values are the effective copies, hence this efficiently deals with recursion.
291 return internAlongCopyAxis(factory,
292 originalCtx.createInferredEffective(factory, this, declared.stream(), effective.stream()));
295 private @NonNull E tryToReuseSubstatements(final @NonNull StatementFactory<A, D, E> factory,
296 final @NonNull E original) {
297 if (allSubstatementsContextIndependent()) {
298 LOG.debug("Reusing substatements of: {}", prototype);
299 substatements = noRefs() ? REUSED_SUBSTATEMENTS : reusePrototypeReplicas();
301 return factory.copyEffective(this, original);
304 // Fall back to full instantiation, which populates our substatements. Then check if we should be reusing
305 // the substatement list, as this operation turned out to not affect them.
306 final E effective = createInferredEffective(factory);
307 // Since we have forced instantiation to deal with this case, we also need to reset the 'modified' flag
310 if (sameSubstatements(original.effectiveSubstatements(), effective)) {
311 LOG.debug("Reusing unchanged substatements of: {}", prototype);
312 return factory.copyEffective(this, original);
317 private @NonNull E internAlongCopyAxis(final StatementFactory<A, D, E> factory, final @NonNull E stmt) {
319 final EffectiveStatementState state = factory.extractEffectiveState(stmt);
321 return prototype.unmodifiedEffectiveSource().attachEffectiveCopy(state, stmt);
327 private List<ReactorStmtCtx<?, ?, ?>> reusePrototypeReplicas() {
328 return reusePrototypeReplicas(Streams.concat(prototype.streamDeclared(), prototype.streamEffective()));
331 private List<ReactorStmtCtx<?, ?, ?>> reusePrototypeReplicas(final Stream<StmtContext<?, ?, ?>> stream) {
334 final ReplicaStatementContext<?, ?, ?> ret = ((ReactorStmtCtx<?, ?, ?>) stmt).replicaAsChildOf(this);
335 ret.buildEffective();
338 .collect(Collectors.toUnmodifiableList());
341 private static boolean sameSubstatements(final Collection<?> original, final EffectiveStatement<?, ?> effective) {
342 final Collection<?> copied = effective.effectiveSubstatements();
343 if (copied != effective.effectiveSubstatements() || original.size() != copied.size()) {
344 // Do not bother if result is treating substatements as transient
348 final Iterator<?> oit = original.iterator();
349 final Iterator<?> cit = copied.iterator();
350 while (oit.hasNext()) {
351 verify(cit.hasNext());
352 // Identity comparison on purpose to side-step whatever equality there might be. We want to reuse instances
354 if (oit.next() != cit.next()) {
358 verify(!cit.hasNext());
362 private static boolean allReused(final List<EffectiveCopy> entries) {
363 return entries.stream().allMatch(EffectiveCopy::isReused);
367 ReactorStmtCtx<A, D, E> unmodifiedEffectiveSource() {
368 return isModified() ? this : prototype.unmodifiedEffectiveSource();
372 boolean hasEmptySubstatements() {
373 if (substatements == null) {
374 return prototype.hasEmptySubstatements();
376 return substatements instanceof HashMap ? false : ((List<?>) substatements).isEmpty();
380 boolean noSensitiveSubstatements() {
381 accessSubstatements();
382 if (substatements == null) {
383 // No difference, defer to prototype
384 return prototype.allSubstatementsContextIndependent();
386 if (substatements instanceof List) {
387 // Fully materialized, walk all statements
388 return noSensitiveSubstatements(castEffective(substatements));
391 // Partially-materialized. This case has three distinct outcomes:
392 // - prototype does not have a sensitive statement (1)
393 // - protype has a sensitive substatement, and
394 // - we have not marked is as unsupported (2)
395 // - we have marked it as unsupported (3)
397 // Determining the outcome between (2) and (3) is a bother, this check errs on the side of false negative side
398 // and treats (3) as (2) -- i.e. even if we marked a sensitive statement as unsupported, we still consider it
399 // as affecting the result.
400 return prototype.allSubstatementsContextIndependent()
401 && noSensitiveSubstatements(castMaterialized(substatements).values());
405 <X, Z extends EffectiveStatement<X, ?>> @NonNull Optional<X> findSubstatementArgumentImpl(
406 final @NonNull Class<Z> type) {
407 if (substatements instanceof List) {
408 return super.findSubstatementArgumentImpl(type);
411 final Optional<X> templateArg = prototype.findSubstatementArgument(type);
412 if (templateArg.isEmpty()) {
415 if (SchemaTreeEffectiveStatement.class.isAssignableFrom(type)) {
416 // X is known to be QName
417 return (Optional<X>) templateArg.map(template -> ((QName) template).bindTo(targetModule));
423 boolean hasSubstatementImpl(final @NonNull Class<? extends EffectiveStatement<?, ?>> type) {
424 return substatements instanceof List ? super.hasSubstatementImpl(type)
425 // We do not allow deletion of partially-materialized statements, hence this is accurate
426 : prototype.hasSubstatement(type);
430 public <Y extends DeclaredStatement<QName>, Z extends SchemaTreeEffectiveStatement<Y>>
431 StmtContext<QName, Y, Z> requestSchemaTreeChild(final QName qname) {
432 if (substatements instanceof List) {
433 // We have performed materialization, hence we have triggered creation of all our schema tree child
438 final QName templateQName = qname.bindTo(StmtContextUtils.getRootModuleQName(prototype));
439 LOG.debug("Materializing child {} from {}", qname, templateQName);
441 final StmtContext<?, ?, ?> template;
442 if (prototype instanceof InferredStatementContext) {
443 // Note: we need to access namespace here, as the target statement may have already been populated, in which
444 // case we want to obtain the statement in local namespace storage.
445 template = (StmtContext) ((InferredStatementContext<?, ?, ?>) prototype).getFromNamespace(
446 SchemaTreeNamespace.class, templateQName);
448 template = prototype.allSubstatementsStream()
449 .filter(stmt -> stmt.producesEffective(SchemaTreeEffectiveStatement.class)
450 && templateQName.equals(stmt.argument()))
455 if (template == null) {
456 // We do not have a template, this child does not exist. It may be added later, but that is someone else's
458 LOG.debug("Child {} does not have a template", qname);
462 @SuppressWarnings("unchecked")
463 final Mutable<QName, Y, Z> ret = (Mutable<QName, Y, Z>) copySubstatement((Mutable<?, ?, ?>) template)
465 () -> new InferenceException(this, "Failed to materialize child %s template %s", qname, template));
466 ensureCompletedPhase(ret);
467 addMaterialized(template, ret);
469 LOG.debug("Child {} materialized", qname);
473 // Instantiate this statement's effective substatements. Note this method has side-effects in namespaces and overall
474 // BuildGlobalContext, hence it must be called at most once.
475 private List<ReactorStmtCtx<?, ?, ?>> ensureEffectiveSubstatements() {
476 accessSubstatements();
477 return substatements instanceof List ? castEffective(substatements)
478 : initializeSubstatements(castMaterialized(substatements));
482 Iterator<ReactorStmtCtx<?, ?, ?>> effectiveChildrenToComplete() {
483 // When we have not initialized, there are no statements to catch up: we will catch up when we are copying
484 // from prototype (which is already at ModelProcessingPhase.EFFECTIVE_MODEL).
485 if (substatements == null) {
486 return Collections.emptyIterator();
488 accessSubstatements();
489 if (substatements instanceof HashMap) {
490 return castMaterialized(substatements).values().iterator();
492 return castEffective(substatements).iterator();
497 Stream<? extends @NonNull StmtContext<?, ?, ?>> streamDeclared() {
498 return Stream.empty();
502 Stream<? extends @NonNull StmtContext<?, ?, ?>> streamEffective() {
503 return ensureEffectiveSubstatements().stream().filter(StmtContext::isSupportedToBuildEffective);
506 private void accessSubstatements() {
507 if (substatements instanceof String) {
508 throw new VerifyException("Access to " + substatements + " substatements of " + this);
513 void markNoParentRef() {
514 final Object local = substatements;
516 markNoParentRef(castEffective(local));
521 int sweepSubstatements() {
522 final Object local = substatements;
523 substatements = SWEPT_SUBSTATEMENTS;
525 if (local instanceof List) {
526 final List<ReactorStmtCtx<?, ?, ?>> list = castEffective(local);
528 count = countUnswept(list);
533 private List<ReactorStmtCtx<?, ?, ?>> initializeSubstatements(
534 final Map<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree) {
535 final Collection<? extends StatementContextBase<?, ?, ?>> declared = prototype.mutableDeclaredSubstatements();
536 final Collection<? extends Mutable<?, ?, ?>> effective = prototype.mutableEffectiveSubstatements();
538 final List<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
539 for (final Mutable<?, ?, ?> stmtContext : declared) {
540 if (stmtContext.isSupportedByFeatures()) {
541 copySubstatement(stmtContext, buffer, materializedSchemaTree);
544 for (final Mutable<?, ?, ?> stmtContext : effective) {
545 copySubstatement(stmtContext, buffer, materializedSchemaTree);
548 final List<ReactorStmtCtx<?, ?, ?>> ret = beforeAddEffectiveStatementUnsafe(ImmutableList.of(), buffer.size());
549 ret.addAll((Collection) buffer);
558 // Statement copy mess starts here. As it turns out, it's not that much of a mess, but it does make your head spin
559 // sometimes. Tread softly because you tread on my dreams.
562 private EffectiveCopy effectiveCopy(final ReactorStmtCtx<?, ?, ?> stmt) {
563 final ReactorStmtCtx<?, ?, ?> effective = stmt.asEffectiveChildOf(this, childCopyType(), targetModule);
564 return effective == null ? null : new EffectiveCopy(stmt, effective);
567 private void copySubstatement(final Mutable<?, ?, ?> substatement, final Collection<Mutable<?, ?, ?>> buffer,
568 final Map<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree) {
569 // Consult materialized substatements. We are in a copy operation and will end up throwing materialized
570 // statements away -- hence we do not perform Map.remove() to save ourselves a mutation operation.
572 // We could also perform a Map.containsKey() and perform a bulk add, but that would mean the statement order
573 // against parent would change -- and we certainly do not want that to happen.
574 final ReactorStmtCtx<?, ?, ?> materialized = findMaterialized(materializedSchemaTree, substatement);
575 if (materialized == null) {
576 copySubstatement(substatement).ifPresent(copy -> {
577 ensureCompletedPhase(copy);
581 buffer.add(materialized);
585 private Optional<? extends Mutable<?, ?, ?>> copySubstatement(final Mutable<?, ?, ?> substatement) {
586 return substatement.copyAsChildOf(this, childCopyType(), targetModule);
589 private void addMaterialized(final StmtContext<?, ?, ?> template, final Mutable<?, ?, ?> copy) {
590 final HashMap<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree;
591 if (substatements == null) {
592 // Lazy initialization of backing map. We do not expect this to be used often or multiple times -- each hit
593 // here means an inference along schema tree, such as deviate/augment. HashMap requires power-of-two and
594 // defaults to 0.75 load factor -- we therefore size it to 4, i.e. next two inserts will not cause a
595 // resizing operation.
596 materializedSchemaTree = new HashMap<>(4);
597 substatements = materializedSchemaTree;
600 verify(substatements instanceof HashMap, "Unexpected substatements %s", substatements);
601 materializedSchemaTree = castMaterialized(substatements);
604 final StmtContext<?, ?, ?> existing = materializedSchemaTree.put(template,
605 (StatementContextBase<?, ?, ?>) copy);
606 if (existing != null) {
607 throw new VerifyException(
608 "Unexpected duplicate request for " + copy.argument() + " previous result was " + existing);
612 private static @Nullable ReactorStmtCtx<?, ?, ?> findMaterialized(
613 final Map<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> materializedSchemaTree,
614 final StmtContext<?, ?, ?> template) {
615 return materializedSchemaTree == null ? null : materializedSchemaTree.get(template);
618 @SuppressWarnings("unchecked")
619 private static List<ReactorStmtCtx<?, ?, ?>> castEffective(final Object substatements) {
620 return (List<ReactorStmtCtx<?, ?, ?>>) substatements;
623 @SuppressWarnings("unchecked")
624 private static HashMap<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>> castMaterialized(final Object substatements) {
625 return (HashMap<StmtContext<?, ?, ?>, ReactorStmtCtx<?, ?, ?>>) substatements;
628 // Statement copy mess ends here
631 * KEEP THINGS ORGANIZED!
633 * below methods exist in the same form in SubstatementContext. If any adjustment is made here, make sure it is
634 * properly updated there.
637 public A argument() {
642 public StatementContextBase<?, ?, ?> getParentContext() {
647 public StorageNodeType getStorageNodeType() {
648 return StorageNodeType.STATEMENT_LOCAL;
652 public StatementContextBase<?, ?, ?> getParentNamespaceStorage() {
657 public RootStatementContext<?, ?, ?> getRoot() {
658 return parent.getRoot();
662 public EffectiveConfig effectiveConfig() {
663 return effectiveConfig(parent);
667 protected boolean isIgnoringIfFeatures() {
668 return isIgnoringIfFeatures(parent);
672 protected boolean isIgnoringConfig() {
673 return isIgnoringConfig(parent);
677 protected boolean isParentSupportedByFeatures() {
678 return parent.isSupportedByFeatures();