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 org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
21 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
22 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
23 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
24 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
25 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementNamespace;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
28 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
29 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
30 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.ContextMutation;
31 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnNamespaceItemAdded;
32 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnPhaseFinished;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
36 class ModifierImpl implements ModelActionBuilder {
37 private static final Logger LOG = LoggerFactory.getLogger(ModifierImpl.class);
39 private final Set<AbstractPrerequisite<?>> unsatisfied = new HashSet<>(1);
40 private final Set<AbstractPrerequisite<?>> mutations = new HashSet<>(1);
41 private final ModelProcessingPhase phase;
43 private InferenceAction action;
44 private boolean actionApplied = false;
46 ModifierImpl(final ModelProcessingPhase phase) {
47 this.phase = Preconditions.checkNotNull(phase);
50 private <D> AbstractPrerequisite<D> addReq(final AbstractPrerequisite<D> prereq) {
51 LOG.trace("Modifier {} adding prerequisite {}", this, prereq);
52 unsatisfied.add(prereq);
56 private <T> AbstractPrerequisite<T> addMutation(final AbstractPrerequisite<T> mutation) {
57 LOG.trace("Modifier {} adding mutation {}", this, mutation);
58 mutations.add(mutation);
62 private void checkNotRegistered() {
63 Preconditions.checkState(action == null, "Action was already registered.");
66 private static IllegalStateException shouldNotHappenProbablyBug(final SourceException e) {
67 return new IllegalStateException("Source exception during registering prerequisite. This is probably bug.", e);
70 private boolean removeSatisfied() {
71 final Iterator<AbstractPrerequisite<?>> it = unsatisfied.iterator();
72 while (it.hasNext()) {
73 final AbstractPrerequisite<?> prereq = it.next();
74 if (prereq.isDone()) {
75 // We are removing current prerequisite from list.
76 LOG.trace("Modifier {} prerequisite {} satisfied", this, prereq);
80 return unsatisfied.isEmpty();
83 ModelProcessingPhase getPhase() {
93 action.prerequisiteFailed(unsatisfied);
97 private void applyAction() {
98 Preconditions.checkState(!actionApplied);
100 actionApplied = true;
103 @SuppressWarnings({ "unchecked", "rawtypes" })
104 private <K, C extends StmtContext<?,?,?>, N extends StatementNamespace<K, ?, ?>> AbstractPrerequisite<C> requiresCtxImpl(final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key,final ModelProcessingPhase phase) {
105 checkNotRegistered();
107 AddedToNamespace<C> addedToNs = new AddedToNamespace<>(phase);
109 contextImpl(context).onNamespaceItemAddedAction((Class) namespace,key,addedToNs);
111 } catch (SourceException e) {
112 throw shouldNotHappenProbablyBug(e);
116 private <C extends StmtContext<?, ?, ?>> AbstractPrerequisite<C> requiresCtxImpl(final C context, final ModelProcessingPhase phase) {
117 Preconditions.checkState(action == null, "Action was already registered.");
119 PhaseFinished<C> phaseFin = new PhaseFinished<>();
121 contextImpl(context).addPhaseCompletedListener(phase,phaseFin);
123 } catch (SourceException e) {
124 throw shouldNotHappenProbablyBug(e);
128 @SuppressWarnings({ "rawtypes", "unchecked" })
129 private <K, C extends StmtContext.Mutable<?, ?, ?> , N extends IdentifierNamespace<K, ? extends StmtContext<?, ?, ?>>> AbstractPrerequisite<C> mutatesCtxImpl(
130 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key, final ModelProcessingPhase phase) {
132 PhaseModificationInNamespace<C> mod = new PhaseModificationInNamespace<>(phase);
135 contextImpl(context).onNamespaceItemAddedAction((Class) namespace,key,mod);
137 } catch (SourceException e) {
138 throw shouldNotHappenProbablyBug(e);
142 private static StatementContextBase<?,?,?> contextImpl(final Object value) {
143 Preconditions.checkArgument(value instanceof StatementContextBase,"Supplied context was not provided by this reactor.");
144 return StatementContextBase.class.cast(value);
148 Preconditions.checkState(action != null, "Action was not defined yet.");
150 if (removeSatisfied()) {
158 public <C extends Mutable<?, ?, ?>, CT extends C> Prerequisite<C> mutatesCtx(final CT context, final ModelProcessingPhase phase) {
160 return addMutation(new PhaseMutation<>(contextImpl(context), phase));
161 } catch (InferenceException e) {
162 throw shouldNotHappenProbablyBug(e);
167 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) {
168 return requiresCtxImpl(context, phase);
173 public <K, N extends StatementNamespace<K, ?, ? >> Prerequisite<StmtContext<?,?,?>> requiresCtx(final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key, final ModelProcessingPhase phase) {
174 return requiresCtxImpl(context, namespace, key, phase);
178 public <D extends DeclaredStatement<?>> Prerequisite<D> requiresDeclared(final StmtContext<?, ? extends D, ?> context) {
179 return requiresCtxImpl(context, FULL_DECLARATION).transform(StmtContext::buildDeclared);
183 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> AbstractPrerequisite<StmtContext<?, D, ?>> requiresDeclaredCtx(
184 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
185 return requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
189 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> Prerequisite<D> requiresDeclared(
190 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
191 final AbstractPrerequisite<StmtContext<?,D,?>> rawContext = requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
192 return rawContext.transform(StmtContext::buildDeclared);
196 public <E extends EffectiveStatement<?, ?>> Prerequisite<E> requiresEffective(final StmtContext<?, ?, ? extends E> stmt) {
197 return requiresCtxImpl(stmt, EFFECTIVE_MODEL).transform(StmtContext::buildEffective);
201 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> AbstractPrerequisite<StmtContext<?, ?, E>> requiresEffectiveCtx(
202 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
203 return requiresCtxImpl(contextImpl(context), namespace,key, EFFECTIVE_MODEL);
207 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> Prerequisite<E> requiresEffective(
208 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
209 final AbstractPrerequisite<StmtContext<?,?,E>> rawContext = requiresCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
210 return rawContext.transform(StmtContext::buildEffective);
215 public <N extends IdentifierNamespace<?, ?>> Prerequisite<Mutable<?, ?, ?>> mutatesNs(final Mutable<?, ?, ?> context,
216 final Class<N> namespace) {
218 return addMutation(new NamespaceMutation<>(contextImpl(context), namespace));
219 } catch (SourceException e) {
220 throw shouldNotHappenProbablyBug(e);
225 public <T extends Mutable<?, ?, ?>> Prerequisite<T> mutatesEffectiveCtx(final T stmt) {
226 return mutatesCtx(stmt, EFFECTIVE_MODEL);
230 public <K, E extends EffectiveStatement<?, ?>, N extends IdentifierNamespace<K, ? extends StmtContext<?, ?, ?>>> AbstractPrerequisite<Mutable<?, ?, E>> mutatesEffectiveCtx(
231 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
232 return mutatesCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
236 public void apply(final InferenceAction action) {
237 Preconditions.checkState(this.action == null, "Action already defined to %s", this.action);
238 this.action = Preconditions.checkNotNull(action);
241 private abstract class AbstractPrerequisite<T> implements Prerequisite<T> {
243 private boolean done = false;
247 public final T get() {
248 Preconditions.checkState(isDone());
253 public final boolean isDone() {
257 final boolean resolvePrereq(final T value) {
263 final <O> Prerequisite<O> transform(final Function<? super T,O> transformation) {
264 return new Prerequisite<O>() {
267 return transformation.apply(AbstractPrerequisite.this.get());
271 public boolean isDone() {
272 return AbstractPrerequisite.this.isDone();
278 public final String toString() {
279 return addToStringAttributes(MoreObjects.toStringHelper(this).omitNullValues()).toString();
282 ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
283 return toStringHelper.add("value", value);
287 private class PhaseMutation<C> extends AbstractPrerequisite<C> implements ContextMutation {
288 @SuppressWarnings("unchecked")
289 public PhaseMutation(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) {
290 context.addMutation(phase, this);
291 resolvePrereq((C) context);
295 public boolean isFinished() {
300 private class PhaseFinished<C extends StmtContext<?, ?, ?>> extends AbstractPrerequisite<C> implements OnPhaseFinished {
301 @SuppressWarnings("unchecked")
303 public boolean phaseFinished(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) {
304 return resolvePrereq((C) (context));
308 private class NamespaceMutation<N extends IdentifierNamespace<?,?>> extends AbstractPrerequisite<StmtContext.Mutable<?, ?, ?>> {
309 public NamespaceMutation(final StatementContextBase<?, ?, ?> ctx, final Class<N> namespace) {
314 private class AddedToNamespace<C extends StmtContext<?,?,?>> extends AbstractPrerequisite<C> implements OnNamespaceItemAdded,OnPhaseFinished {
315 private final ModelProcessingPhase phase;
317 public <K, N extends StatementNamespace<K, ?, ?>> AddedToNamespace(final ModelProcessingPhase phase) {
322 public void namespaceItemAdded(final StatementContextBase<?, ?, ?> context, final Class<?> namespace, final Object key,
323 final Object value) {
324 StatementContextBase<?, ?, ?> targetContext = (StatementContextBase<?, ?, ?>) value;
325 targetContext.addPhaseCompletedListener(phase, this);
328 @SuppressWarnings("unchecked")
330 public boolean phaseFinished(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) {
331 return resolvePrereq((C) context);
335 ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
336 return super.addToStringAttributes(toStringHelper).add("phase", phase);
340 private class PhaseModificationInNamespace<C extends Mutable<?,?,?>> extends AbstractPrerequisite<C> implements OnNamespaceItemAdded, ContextMutation {
341 private final ModelProcessingPhase modPhase;
343 public <K, N extends StatementNamespace<K, ?, ?>> PhaseModificationInNamespace(final ModelProcessingPhase phase) {
344 Preconditions.checkArgument(phase != null, "Model processing phase must not be null");
345 this.modPhase = phase;
348 @SuppressWarnings("unchecked")
350 public void namespaceItemAdded(final StatementContextBase<?, ?, ?> context, final Class<?> namespace, final Object key,
351 final Object value) {
352 StatementContextBase<?, ?, ?> targetCtx = contextImpl(value);
353 targetCtx.addMutation(modPhase, this);
354 resolvePrereq((C) targetCtx);
358 public boolean isFinished() {