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.Preconditions.checkState;
11 import static com.google.common.base.Verify.verify;
12 import static com.google.common.base.Verify.verifyNotNull;
13 import static java.util.Objects.requireNonNull;
15 import com.google.common.collect.ImmutableList;
16 import java.util.Collection;
17 import java.util.List;
18 import java.util.Optional;
19 import java.util.stream.Stream;
20 import org.eclipse.jdt.annotation.NonNull;
21 import org.eclipse.jdt.annotation.Nullable;
22 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
23 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
24 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
25 import org.opendaylight.yangtools.yang.model.api.meta.StatementOrigin;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
28 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport;
29 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
30 import org.opendaylight.yangtools.yang.parser.spi.source.ImplicitSubstatement;
31 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
32 import org.opendaylight.yangtools.yang.parser.spi.source.StatementWriter.ResumedStatement;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
37 * Intermediate subclass of StatementContextBase facing the parser stream via implementation of ResumedStatement. This
38 * shields inference-type substatements from these details.
40 * @param <A> Argument type
41 * @param <D> Declared Statement representation
42 * @param <E> Effective Statement representation
44 abstract class AbstractResumedStatement<A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>>
45 extends StatementContextBase<A, D, E> implements ResumedStatement {
46 private static final Logger LOG = LoggerFactory.getLogger(AbstractResumedStatement.class);
48 private final @NonNull StatementSourceReference statementDeclSource;
49 private final String rawArgument;
51 private List<ReactorStmtCtx<?, ?, ?>> effective = ImmutableList.of();
52 private StatementMap substatements = StatementMap.empty();
53 private @Nullable D declaredInstance;
56 AbstractResumedStatement(final AbstractResumedStatement<A, D, E> original) {
58 this.statementDeclSource = original.statementDeclSource;
59 this.rawArgument = original.rawArgument;
60 this.substatements = original.substatements;
61 this.declaredInstance = original.declaredInstance;
64 AbstractResumedStatement(final StatementDefinitionContext<A, D, E> def, final StatementSourceReference ref,
65 final String rawArgument) {
67 this.statementDeclSource = requireNonNull(ref);
68 this.rawArgument = def.support().internArgument(rawArgument);
71 AbstractResumedStatement(final StatementDefinitionContext<A, D, E> def, final StatementSourceReference ref,
72 final String rawArgument, final CopyType copyType) {
74 this.statementDeclSource = requireNonNull(ref);
75 this.rawArgument = rawArgument;
79 public final Optional<StmtContext<A, D, E>> getOriginalCtx() {
80 return Optional.empty();
84 public final Optional<StmtContext<A, D, E>> getPreviousCopyCtx() {
85 return Optional.empty();
89 public final StatementSourceReference sourceReference() {
90 return statementDeclSource;
94 public final String rawArgument() {
99 public Collection<? extends StatementContextBase<?, ?, ?>> mutableDeclaredSubstatements() {
100 return substatements;
104 public final Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements() {
105 return mutableEffectiveSubstatements(effective);
109 public final void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef) {
110 effective = removeStatementFromEffectiveSubstatements(effective, statementDef);
114 public final void removeStatementFromEffectiveSubstatements(final StatementDefinition statementDef,
115 final String statementArg) {
116 effective = removeStatementFromEffectiveSubstatements(effective, statementDef, statementArg);
120 public final void addEffectiveSubstatement(final Mutable<?, ?, ?> substatement) {
121 effective = addEffectiveSubstatement(effective, substatement);
125 final void addEffectiveSubstatementsImpl(final Collection<? extends Mutable<?, ?, ?>> statements) {
126 effective = addEffectiveSubstatementsImpl(effective, statements);
130 public final D declared() {
132 return (existing = declaredInstance) != null ? existing : loadDeclared();
135 private @NonNull D loadDeclared() {
136 final ModelProcessingPhase phase = getCompletedPhase();
137 checkState(phase == ModelProcessingPhase.FULL_DECLARATION || phase == ModelProcessingPhase.EFFECTIVE_MODEL,
138 "Cannot build declared instance after phase %s", phase);
139 return declaredInstance = definition().getFactory().createDeclared(this);
143 public final StatementDefinition getDefinition() {
144 return publicDefinition();
148 public final StatementSourceReference getSourceReference() {
149 return statementDeclSource;
153 public final boolean isFullyDefined() {
154 return fullyDefined();
158 * Create a new substatement at the specified offset.
160 * @param offset Substatement offset
161 * @param def definition context
162 * @param ref source reference
163 * @param argument statement argument
164 * @param <X> new substatement argument type
165 * @param <Y> new substatement declared type
166 * @param <Z> new substatement effective type
167 * @return A new substatement
169 @SuppressWarnings("checkstyle:methodTypeParameterName")
170 final <X, Y extends DeclaredStatement<X>, Z extends EffectiveStatement<X, Y>>
171 AbstractResumedStatement<X, Y, Z> createSubstatement(final int offset,
172 final StatementDefinitionContext<X, Y, Z> def, final StatementSourceReference ref,
173 final String argument) {
174 final ModelProcessingPhase inProgressPhase = getRoot().getSourceContext().getInProgressPhase();
175 checkState(inProgressPhase != ModelProcessingPhase.EFFECTIVE_MODEL,
176 "Declared statement cannot be added in effective phase at: %s", sourceReference());
178 final var implicitParent = definition().getImplicitParentFor(this, def.getPublicView());
179 if (implicitParent.isPresent()) {
180 return createImplicitParent(offset, implicitParent.orElseThrow(), ref, argument)
181 .createSubstatement(0, def, ref, argument);
184 final AbstractResumedStatement<X, Y, Z> ret = new SubstatementContext<>(this, def, ref, argument);
185 substatements = substatements.put(offset, ret);
186 def.onStatementAdded(ret);
191 final AbstractResumedStatement<A, D, E> unmodifiedEffectiveSource() {
192 // This statement is comes from the source
197 final boolean hasEmptySubstatements() {
198 return substatements.size() == 0 && effective.isEmpty();
202 final boolean noSensitiveSubstatements() {
203 return hasEmptySubstatements()
204 || noSensitiveSubstatements(substatements) && noSensitiveSubstatements(effective);
208 final Iterable<ReactorStmtCtx<?, ?, ?>> effectiveChildrenToComplete() {
213 final Stream<? extends @NonNull StmtContext<?, ?, ?>> streamDeclared() {
214 return declaredSubstatements().stream().filter(StmtContext::isSupportedToBuildEffective);
218 final Stream<? extends @NonNull StmtContext<?, ?, ?>> streamEffective() {
219 return effective.stream().filter(StmtContext::isSupportedToBuildEffective);
223 final void markNoParentRef() {
224 markNoParentRef(substatements);
225 markNoParentRef(effective);
229 final int sweepSubstatements() {
230 // First we need to sweep all statements, which may trigger sweeps all across the place, for example:
231 // - 'effective' member sweeping a 'substatements' member
232 // - 'substatements' member sweeping a 'substatements' member which came before it during iteration
233 // We then iterate once again, counting what remains unswept
234 sweep(substatements);
236 final int count = countUnswept(substatements) + countUnswept(effective);
238 LOG.debug("{} children left to sweep from {}", count, this);
240 substatements = null;
246 * Attempt to lookup a declared substatement by its offset in this statement, passing through any implicit
247 * statements which have been created to encapsulate it.
249 * @param offset Substatement offset
250 * @return Substatement, or null if substatement does not exist.
252 final @Nullable AbstractResumedStatement<?, ?, ?> enterSubstatement(final int offset) {
253 var ret = substatements.get(offset);
255 while (ret.origin() == StatementOrigin.CONTEXT) {
256 ret = verifyNotNull(ret.substatements.get(0));
263 * End the specified phase for this statement and return this statement's declared parent statement.
265 * @param phase processing phase that ended
266 * @return Declared parent statement
268 final @Nullable AbstractResumedStatement<?, ?, ?> exitStatement(final ModelProcessingPhase phase) {
270 final var parent = getParentContext();
271 if (parent == null) {
275 var ret = verifyParent(parent);
276 // Unwind all undeclared statements
277 while (ret.origin() == StatementOrigin.CONTEXT) {
278 ret.endDeclared(phase);
279 ret = verifyParent(ret.getParentContext());
284 // FIXME: AbstractResumedStatement should only ever have AbstractResumedStatement parents, which would remove the
285 // need for this method. In ordered to do that we need to untangle SubstatementContext's users and do not
286 // allow it being reparent()ed.
287 private static AbstractResumedStatement<?, ?, ?> verifyParent(final StatementContextBase<?, ?, ?> parent) {
288 verify(parent instanceof AbstractResumedStatement, "Unexpected parent context %s", parent);
289 return (AbstractResumedStatement<?, ?, ?>) parent;
292 final void resizeSubstatements(final int expectedSize) {
293 substatements = substatements.ensureCapacity(expectedSize);
296 final void walkChildren(final ModelProcessingPhase phase) {
297 checkState(isFullyDefined());
298 substatements.forEach(stmt -> {
299 stmt.walkChildren(phase);
300 stmt.endDeclared(phase);
305 * Ends declared section of current node for the specified phase.
307 * @param phase processing phase that ended
309 final void endDeclared(final ModelProcessingPhase phase) {
310 definition().onDeclarationFinished(this, phase);
313 private AbstractResumedStatement<?, ?, ?> createImplicitParent(final int offset,
314 final StatementSupport<?, ?, ?> implicitParent, final StatementSourceReference ref, final String argument) {
315 return createSubstatement(offset, new StatementDefinitionContext<>(implicitParent),
316 ImplicitSubstatement.of(ref), argument);