2 * Copyright (c) 2015, 2016 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 org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase.EFFECTIVE_MODEL;
11 import static org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase.FULL_DECLARATION;
13 import com.google.common.base.MoreObjects;
14 import com.google.common.base.MoreObjects.ToStringHelper;
15 import com.google.common.base.Preconditions;
16 import java.util.HashSet;
17 import java.util.Iterator;
19 import java.util.function.Function;
20 import javax.annotation.Nonnull;
21 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
22 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
23 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
24 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
25 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementNamespace;
28 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
29 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
30 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
31 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.ContextMutation;
32 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnNamespaceItemAdded;
33 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnPhaseFinished;
34 import org.slf4j.Logger;
35 import org.slf4j.LoggerFactory;
37 class ModifierImpl implements ModelActionBuilder {
38 private static final Logger LOG = LoggerFactory.getLogger(ModifierImpl.class);
40 private final Set<AbstractPrerequisite<?>> unsatisfied = new HashSet<>(1);
41 private final Set<AbstractPrerequisite<?>> mutations = new HashSet<>(1);
42 private final ModelProcessingPhase phase;
44 private InferenceAction action;
45 private boolean actionApplied = false;
47 ModifierImpl(final ModelProcessingPhase phase) {
48 this.phase = Preconditions.checkNotNull(phase);
51 private <D> AbstractPrerequisite<D> addReq(final AbstractPrerequisite<D> prereq) {
52 LOG.trace("Modifier {} adding prerequisite {}", this, prereq);
53 unsatisfied.add(prereq);
57 private <T> AbstractPrerequisite<T> addMutation(final AbstractPrerequisite<T> mutation) {
58 LOG.trace("Modifier {} adding mutation {}", this, mutation);
59 mutations.add(mutation);
63 private void checkNotRegistered() {
64 Preconditions.checkState(action == null, "Action was already registered.");
67 private static IllegalStateException shouldNotHappenProbablyBug(final SourceException e) {
68 return new IllegalStateException("Source exception during registering prerequisite. This is probably bug.", e);
71 private boolean removeSatisfied() {
72 final Iterator<AbstractPrerequisite<?>> it = unsatisfied.iterator();
73 while (it.hasNext()) {
74 final AbstractPrerequisite<?> prereq = it.next();
75 if (prereq.isDone()) {
76 // We are removing current prerequisite from list.
77 LOG.trace("Modifier {} prerequisite {} satisfied", this, prereq);
81 return unsatisfied.isEmpty();
84 ModelProcessingPhase getPhase() {
94 action.prerequisiteFailed(unsatisfied);
98 private void applyAction() {
99 Preconditions.checkState(!actionApplied);
101 actionApplied = true;
104 @SuppressWarnings({ "unchecked", "rawtypes" })
105 private <K, C extends StmtContext<?,?,?>, N extends StatementNamespace<K, ?, ?>> AbstractPrerequisite<C>
106 requiresCtxImpl(final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key,
107 final ModelProcessingPhase phase) {
108 checkNotRegistered();
111 AddedToNamespace<C> addedToNs = new AddedToNamespace<>(phase);
113 contextImpl(context).onNamespaceItemAddedAction((Class) namespace, key, addedToNs);
115 } catch (SourceException e) {
116 throw shouldNotHappenProbablyBug(e);
120 private <C extends StmtContext<?, ?, ?>> AbstractPrerequisite<C> requiresCtxImpl(final C context,
121 final ModelProcessingPhase phase) {
122 checkNotRegistered();
125 PhaseFinished<C> phaseFin = new PhaseFinished<>();
127 contextImpl(context).addPhaseCompletedListener(phase, phaseFin);
129 } catch (SourceException e) {
130 throw shouldNotHappenProbablyBug(e);
134 @SuppressWarnings({ "rawtypes", "unchecked" })
135 private <K, C extends StmtContext.Mutable<?, ?, ?> , N extends IdentifierNamespace<K, ? extends StmtContext<?, ?, ?>>>
136 AbstractPrerequisite<C> mutatesCtxImpl(final StmtContext<?, ?, ?> context, final Class<N> namespace,
137 final K key, final ModelProcessingPhase phase) {
138 checkNotRegistered();
141 PhaseModificationInNamespace<C> mod = new PhaseModificationInNamespace<>(phase);
144 contextImpl(context).onNamespaceItemAddedAction((Class) namespace, key, mod);
146 } catch (SourceException e) {
147 throw shouldNotHappenProbablyBug(e);
151 private static StatementContextBase<?,?,?> contextImpl(final Object value) {
152 Preconditions.checkArgument(value instanceof StatementContextBase,"Supplied context was not provided by this reactor.");
153 return StatementContextBase.class.cast(value);
157 Preconditions.checkState(action != null, "Action was not defined yet.");
159 if (removeSatisfied()) {
168 public <C extends Mutable<?, ?, ?>, CT extends C> Prerequisite<C> mutatesCtx(final CT context, final ModelProcessingPhase phase) {
170 return addMutation(new PhaseMutation<>(contextImpl(context), phase));
171 } catch (InferenceException e) {
172 throw shouldNotHappenProbablyBug(e);
178 public <A,D extends DeclaredStatement<A>,E extends EffectiveStatement<A, D>> AbstractPrerequisite<StmtContext<A, D, E>> requiresCtx(final StmtContext<A, D, E> context, final ModelProcessingPhase phase) {
179 return requiresCtxImpl(context, phase);
185 public <K, N extends StatementNamespace<K, ?, ? >> Prerequisite<StmtContext<?,?,?>> requiresCtx(final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key, final ModelProcessingPhase phase) {
186 return requiresCtxImpl(context, namespace, key, phase);
191 public <D extends DeclaredStatement<?>> Prerequisite<D> requiresDeclared(final StmtContext<?, ? extends D, ?> context) {
192 return requiresCtxImpl(context, FULL_DECLARATION).transform(StmtContext::buildDeclared);
197 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> AbstractPrerequisite<StmtContext<?, D, ?>> requiresDeclaredCtx(
198 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
199 return requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
204 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> Prerequisite<D> requiresDeclared(
205 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
206 final AbstractPrerequisite<StmtContext<?, D, ?>> rawContext = requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
207 return rawContext.transform(StmtContext::buildDeclared);
212 public <E extends EffectiveStatement<?, ?>> Prerequisite<E> requiresEffective(final StmtContext<?, ?, ? extends E> stmt) {
213 return requiresCtxImpl(stmt, EFFECTIVE_MODEL).transform(StmtContext::buildEffective);
218 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> AbstractPrerequisite<StmtContext<?, ?, E>> requiresEffectiveCtx(
219 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
220 return requiresCtxImpl(contextImpl(context), namespace, key, EFFECTIVE_MODEL);
225 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> Prerequisite<E> requiresEffective(
226 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
227 final AbstractPrerequisite<StmtContext<?,?,E>> rawContext = requiresCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
228 return rawContext.transform(StmtContext::buildEffective);
234 public <N extends IdentifierNamespace<?, ?>> Prerequisite<Mutable<?, ?, ?>> mutatesNs(final Mutable<?, ?, ?> context,
235 final Class<N> namespace) {
237 return addMutation(new NamespaceMutation<>(contextImpl(context), namespace));
238 } catch (SourceException e) {
239 throw shouldNotHappenProbablyBug(e);
245 public <K, E extends EffectiveStatement<?, ?>, N extends IdentifierNamespace<K, ? extends StmtContext<?, ?, ?>>> AbstractPrerequisite<Mutable<?, ?, E>> mutatesEffectiveCtx(
246 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
247 return mutatesCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
251 public void apply(final InferenceAction action) {
252 Preconditions.checkState(this.action == null, "Action already defined to %s", this.action);
253 this.action = Preconditions.checkNotNull(action);
256 private abstract class AbstractPrerequisite<T> implements Prerequisite<T> {
258 private boolean done = false;
262 public final T get() {
263 Preconditions.checkState(isDone());
267 final boolean isDone() {
271 final boolean resolvePrereq(final T value) {
277 final <O> Prerequisite<O> transform(final Function<? super T, O> transformation) {
278 return () -> transformation.apply(get());
282 public final String toString() {
283 return addToStringAttributes(MoreObjects.toStringHelper(this).omitNullValues()).toString();
286 ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
287 return toStringHelper.add("value", value);
291 private class PhaseMutation<C> extends AbstractPrerequisite<C> implements ContextMutation {
292 @SuppressWarnings("unchecked")
293 public PhaseMutation(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) {
294 context.addMutation(phase, this);
295 resolvePrereq((C) context);
299 public boolean isFinished() {
304 private class PhaseFinished<C extends StmtContext<?, ?, ?>> extends AbstractPrerequisite<C> implements OnPhaseFinished {
305 @SuppressWarnings("unchecked")
307 public boolean phaseFinished(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) {
308 return resolvePrereq((C) (context));
312 private class NamespaceMutation<N extends IdentifierNamespace<?,?>> extends AbstractPrerequisite<StmtContext.Mutable<?, ?, ?>> {
313 public NamespaceMutation(final StatementContextBase<?, ?, ?> ctx, final Class<N> namespace) {
318 private class AddedToNamespace<C extends StmtContext<?,?,?>> extends AbstractPrerequisite<C> implements OnNamespaceItemAdded,OnPhaseFinished {
319 private final ModelProcessingPhase phase;
321 public <K, N extends StatementNamespace<K, ?, ?>> AddedToNamespace(final ModelProcessingPhase phase) {
326 public void namespaceItemAdded(final StatementContextBase<?, ?, ?> context, final Class<?> namespace, final Object key,
327 final Object value) {
328 StatementContextBase<?, ?, ?> targetContext = (StatementContextBase<?, ?, ?>) value;
329 targetContext.addPhaseCompletedListener(phase, this);
332 @SuppressWarnings("unchecked")
334 public boolean phaseFinished(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) {
335 return resolvePrereq((C) context);
339 ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
340 return super.addToStringAttributes(toStringHelper).add("phase", phase);
344 private class PhaseModificationInNamespace<C extends Mutable<?,?,?>> extends AbstractPrerequisite<C> implements OnNamespaceItemAdded, ContextMutation {
345 private final ModelProcessingPhase modPhase;
347 public <K, N extends StatementNamespace<K, ?, ?>> PhaseModificationInNamespace(final ModelProcessingPhase phase) {
348 Preconditions.checkArgument(phase != null, "Model processing phase must not be null");
349 this.modPhase = phase;
352 @SuppressWarnings("unchecked")
354 public void namespaceItemAdded(final StatementContextBase<?, ?, ?> context, final Class<?> namespace, final Object key,
355 final Object value) {
356 StatementContextBase<?, ?, ?> targetCtx = contextImpl(value);
357 targetCtx.addMutation(modPhase, this);
358 resolvePrereq((C) targetCtx);
362 public boolean isFinished() {