2 * Copyright (c) 2015 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;
12 import com.google.common.base.Function;
13 import com.google.common.base.Preconditions;
14 import java.util.HashSet;
15 import java.util.Iterator;
17 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
18 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
19 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
20 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
21 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
22 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
23 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementNamespace;
24 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
25 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
27 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
28 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.ContextMutation;
29 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnNamespaceItemAdded;
30 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnPhaseFinished;
32 class ModifierImpl implements ModelActionBuilder {
34 private final ModelProcessingPhase phase;
35 private final Set<AbstractPrerequisite<?>> unsatisfied = new HashSet<>();
36 private final Set<AbstractPrerequisite<?>> mutations = new HashSet<>();
38 private InferenceAction action;
39 private boolean actionApplied = false;
41 ModifierImpl(final ModelProcessingPhase phase) {
42 this.phase = Preconditions.checkNotNull(phase);
45 private <D> AbstractPrerequisite<D> addReq(final AbstractPrerequisite<D> prereq) {
46 unsatisfied.add(prereq);
50 private <T> AbstractPrerequisite<T> addMutation(final AbstractPrerequisite<T> mutation) {
51 mutations.add(mutation);
57 private void checkNotRegistered() {
58 Preconditions.checkState(action == null, "Action was already registered.");
61 private static IllegalStateException shouldNotHappenProbablyBug(final SourceException e) {
62 return new IllegalStateException("Source exception during registering prerequisite. This is probably bug.",e);
65 private void tryToResolve() throws InferenceException {
66 if(action == null || isApplied()) {
67 // Action was not yet defined
70 if(removeSatisfied()) {
75 private boolean removeSatisfied() {
76 Iterator<AbstractPrerequisite<?>> prereq = unsatisfied.iterator();
77 boolean allSatisfied = true;
78 while(prereq.hasNext()) {
79 if(prereq.next().isDone()) {
80 // We are removing current prerequisite from list.
89 ModelProcessingPhase getPhase() {
98 void failModifier() throws InferenceException {
100 action.prerequisiteFailed(unsatisfied);
104 private void applyAction() throws InferenceException {
108 } catch (InferenceException e) {
109 actionApplied = false;
112 // Mark all mutations as performed, so context node could move to next.
113 actionApplied = true;
116 @SuppressWarnings({ "unchecked", "rawtypes" })
117 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) {
118 checkNotRegistered();
120 AddedToNamespace<C> addedToNs = new AddedToNamespace<C>(phase);
122 contextImpl(context).onNamespaceItemAddedAction((Class) namespace,key,addedToNs);
124 } catch (SourceException e) {
125 throw shouldNotHappenProbablyBug(e);
129 private <C extends StmtContext<?, ?, ?>> AbstractPrerequisite<C> requiresCtxImpl(final C context, final ModelProcessingPhase phase) {
130 Preconditions.checkState(action == null, "Action was already registered.");
132 PhaseFinished<C> phaseFin = new PhaseFinished<C>();
134 contextImpl(context).addPhaseCompletedListener(phase,phaseFin);
136 } catch (SourceException e) {
137 throw shouldNotHappenProbablyBug(e);
141 @SuppressWarnings({ "rawtypes", "unchecked" })
142 private <K, C extends StmtContext.Mutable<?, ?, ?> , N extends StatementNamespace<K, ?, ? >> AbstractPrerequisite<C> mutatesCtxImpl(
143 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key, final ModelProcessingPhase phase) {
145 PhaseModificationInNamespace<C> mod = new PhaseModificationInNamespace<C>(phase);
147 contextImpl(context).onNamespaceItemAddedAction((Class) namespace,key,mod);
149 } catch (SourceException e) {
150 throw shouldNotHappenProbablyBug(e);
154 private static StatementContextBase<?,?,?> contextImpl(final StmtContext<?,?,?> context) {
155 Preconditions.checkArgument(context instanceof StatementContextBase,"Supplied context was not provided by this reactor.");
156 return StatementContextBase.class.cast(context);
160 public <C extends Mutable<?, ?, ?>, CT extends C> Prerequisite<C> mutatesCtx(final CT context, final ModelProcessingPhase phase) {
162 return addMutation(new PhaseMutation<C>(contextImpl(context),phase));
163 } catch (InferenceException e) {
164 throw shouldNotHappenProbablyBug(e);
169 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) {
170 return requiresCtxImpl(context, phase);
175 public <K, N extends StatementNamespace<K, ?, ? >> Prerequisite<StmtContext<?,?,?>> requiresCtx(final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key, final ModelProcessingPhase phase) {
176 return requiresCtxImpl(context, namespace, key, phase);
180 public <D extends DeclaredStatement<?>> Prerequisite<D> requiresDeclared(final StmtContext<?, ? extends D, ?> context) {
181 return requiresCtxImpl(context, FULL_DECLARATION).transform(StmtContextUtils.<D>buildDeclared());
185 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> AbstractPrerequisite<StmtContext<?, D, ?>> requiresDeclaredCtx(
186 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
187 return requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
191 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> Prerequisite<D> requiresDeclared(
192 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
193 final AbstractPrerequisite<StmtContext<?,D,?>> rawContext = requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
194 return rawContext.transform(StmtContextUtils.<D>buildDeclared());
198 public <E extends EffectiveStatement<?, ?>> Prerequisite<E> requiresEffective(final StmtContext<?, ?, ? extends E> stmt) {
199 return requiresCtxImpl(stmt, EFFECTIVE_MODEL).transform(StmtContextUtils.<E>buildEffective());
203 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> AbstractPrerequisite<StmtContext<?, ?, E>> requiresEffectiveCtx(
204 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
205 return requiresCtxImpl(contextImpl(context),namespace,key, EFFECTIVE_MODEL);
209 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> Prerequisite<E> requiresEffective(
210 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
211 final AbstractPrerequisite<StmtContext<?,?,E>> rawContext = requiresCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
212 return rawContext.transform(StmtContextUtils.<E>buildEffective());
217 public <N extends IdentifierNamespace<?, ?>> Prerequisite<Mutable<?, ?, ?>> mutatesNs(final Mutable<?, ?, ?> context,
218 final Class<N> namespace) {
220 return addMutation(new NamespaceMutation<N>(contextImpl(context),namespace));
221 } catch (SourceException e) {
222 throw shouldNotHappenProbablyBug(e);
227 public <T extends Mutable<?, ?, ?>> Prerequisite<T> mutatesEffectiveCtx(final T stmt) {
228 return mutatesCtx(stmt, EFFECTIVE_MODEL);
233 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> AbstractPrerequisite<Mutable<?, ?, E>> mutatesEffectiveCtx(
234 final StmtContext<?, ?, ?> context, final Class<N> namespace, final K key) {
235 return mutatesCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
241 public void apply(final InferenceAction action) throws InferenceException {
242 this.action = Preconditions.checkNotNull(action);
246 private abstract class AbstractPrerequisite<T> implements Prerequisite<T> {
249 private boolean done = false;
253 Preconditions.checkState(isDone());
258 public boolean isDone() {
262 protected boolean resolvePrereq(final T value) throws InferenceException {
269 protected <O> Prerequisite<O> transform(final Function<? super T,O> transformation) {
271 return new Prerequisite<O>() {
275 return transformation.apply(AbstractPrerequisite.this.get());
279 public boolean isDone() {
280 return AbstractPrerequisite.this.isDone();
288 private class PhaseMutation<C> extends AbstractPrerequisite<C> implements ContextMutation {
290 @SuppressWarnings("unchecked")
291 public PhaseMutation(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) throws InferenceException {
292 context.addMutation(phase, this);
293 resolvePrereq((C) context);
297 public boolean isFinished() {
303 private class PhaseFinished<C extends StmtContext<?, ?, ?>> extends AbstractPrerequisite<C> implements OnPhaseFinished {
305 @SuppressWarnings("unchecked")
307 public boolean phaseFinished(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) throws SourceException {
308 return resolvePrereq((C) (context));
312 private class NamespaceMutation<N extends IdentifierNamespace<?,?>> extends AbstractPrerequisite<StmtContext.Mutable<?, ?, ?>> {
314 public NamespaceMutation(final StatementContextBase<?, ?, ?> ctx, final Class<N> namespace) throws InferenceException {
320 private class AddedToNamespace<C extends StmtContext<?,?,?>> extends AbstractPrerequisite<C> implements OnNamespaceItemAdded,OnPhaseFinished {
322 private final ModelProcessingPhase phase;
324 public <K, N extends StatementNamespace<K, ?, ?>> AddedToNamespace(final ModelProcessingPhase phase) {
329 public void namespaceItemAdded(final StatementContextBase<?, ?, ?> context, final Class<?> namespace, final Object key,
330 final Object value) throws SourceException {
331 StatementContextBase<?, ?, ?> targetContext = (StatementContextBase<?, ?, ?>) value;
332 targetContext.addPhaseCompletedListener(phase, this);
335 @SuppressWarnings("unchecked")
337 public boolean phaseFinished(final StatementContextBase<?, ?, ?> context, final ModelProcessingPhase phase) throws SourceException {
338 return resolvePrereq((C) context);
343 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) throws SourceException {
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) throws SourceException {
356 context.addMutation(modPhase,this);
357 resolvePrereq((C) context);
361 public boolean isFinished() {