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;
13 import com.google.common.base.Function;
14 import com.google.common.base.Preconditions;
15 import java.util.HashSet;
16 import java.util.Iterator;
18 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
19 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
20 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
21 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
22 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
23 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
24 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementNamespace;
25 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
26 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
28 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
29 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.ContextMutation;
30 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnNamespaceItemAdded;
31 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.OnPhaseFinished;
33 class ModifierImpl implements ModelActionBuilder {
35 private final ModelProcessingPhase phase;
36 private final Set<AbstractPrerequisite<?>> unsatisfied = new HashSet<>();
37 private final Set<AbstractPrerequisite<?>> mutations = new HashSet<>();
39 private InferenceAction action;
40 private boolean actionApplied = false;
42 ModifierImpl(ModelProcessingPhase phase) {
43 this.phase = Preconditions.checkNotNull(phase);
46 private <D> AbstractPrerequisite<D> addReq(AbstractPrerequisite<D> prereq) {
47 unsatisfied.add(prereq);
51 private <T> AbstractPrerequisite<T> addMutation(AbstractPrerequisite<T> mutation) {
52 mutations.add(mutation);
58 private void checkNotRegistered() {
59 Preconditions.checkState(action == null, "Action was already registered.");
62 private IllegalStateException shouldNotHappenProbablyBug(SourceException e) {
63 return new IllegalStateException("Source exception during registering prerequisite. This is probably bug.",e);
66 private void tryToResolve() throws InferenceException {
68 // Action was not yet defined
71 if(removeSatisfied()) {
76 private boolean removeSatisfied() {
77 Iterator<AbstractPrerequisite<?>> prereq = unsatisfied.iterator();
78 boolean allSatisfied = true;
79 while(prereq.hasNext()) {
80 if(prereq.next().isDone()) {
81 // We are removing current prerequisite from list.
90 ModelProcessingPhase getPhase() {
99 void failModifier() throws InferenceException {
101 action.prerequisiteFailed(unsatisfied);
105 private void applyAction() throws InferenceException {
108 // Mark all mutations as performed, so context node could move to next.
109 actionApplied = true;
112 @SuppressWarnings({ "unchecked", "rawtypes" })
113 private <K, C extends StmtContext<?,?,?>, N extends StatementNamespace<K, ?, ?>> AbstractPrerequisite<C> requiresCtxImpl(StmtContext<?, ?, ?> context, Class<N> namespace, K key,ModelProcessingPhase phase) {
114 checkNotRegistered();
116 AddedToNamespace<C> addedToNs = new AddedToNamespace<C>(phase);
118 contextImpl(context).onNamespaceItemAddedAction((Class) namespace,key,addedToNs);
120 } catch (SourceException e) {
121 throw shouldNotHappenProbablyBug(e);
125 private <C extends StmtContext<?, ?, ?>> AbstractPrerequisite<C> requiresCtxImpl(C context, ModelProcessingPhase phase) {
126 Preconditions.checkState(action == null, "Action was already registered.");
128 PhaseFinished<C> phaseFin = new PhaseFinished<C>();
130 contextImpl(context).addPhaseCompletedListener(phase,phaseFin);
132 } catch (SourceException e) {
133 throw shouldNotHappenProbablyBug(e);
137 @SuppressWarnings({ "rawtypes", "unchecked" })
138 private <K, C extends StmtContext.Mutable<?, ?, ?> , N extends StatementNamespace<K, ?, ? >> AbstractPrerequisite<C> mutatesCtxImpl(
139 StmtContext<?, ?, ?> context, Class<N> namespace, K key, ModelProcessingPhase phase) {
141 PhaseModificationInNamespace<C> mod = new PhaseModificationInNamespace<C>(phase);
143 contextImpl(context).onNamespaceItemAddedAction((Class) namespace,key,mod);
145 } catch (SourceException e) {
146 throw shouldNotHappenProbablyBug(e);
150 private static StatementContextBase<?,?,?> contextImpl(StmtContext<?,?,?> context) {
151 Preconditions.checkArgument(context instanceof StatementContextBase,"Supplied context was not provided by this reactor.");
152 return StatementContextBase.class.cast(context);
156 public <C extends Mutable<?, ?, ?>, CT extends C> Prerequisite<C> mutatesCtx(CT context, ModelProcessingPhase phase) {
158 return addMutation(new PhaseMutation<C>(contextImpl(context),phase));
159 } catch (InferenceException e) {
160 throw shouldNotHappenProbablyBug(e);
165 public <A,D extends DeclaredStatement<A>,E extends EffectiveStatement<A, D>> AbstractPrerequisite<StmtContext<A, D, E>> requiresCtx(StmtContext<A, D, E> context, ModelProcessingPhase phase) {
166 return requiresCtxImpl(context, phase);
171 public <K, N extends StatementNamespace<K, ?, ? >> Prerequisite<StmtContext<?,?,?>> requiresCtx(StmtContext<?, ?, ?> context, Class<N> namespace, K key, ModelProcessingPhase phase) {
172 return requiresCtxImpl(context, namespace, key, phase);
176 public <D extends DeclaredStatement<?>> Prerequisite<D> requiresDeclared(StmtContext<?, ? extends D, ?> context) {
177 return requiresCtxImpl(context, FULL_DECLARATION).transform(StmtContextUtils.<D>buildDeclared());
181 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> AbstractPrerequisite<StmtContext<?, D, ?>> requiresDeclaredCtx(
182 StmtContext<?, ?, ?> context, Class<N> namespace, K key) {
183 return requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
187 public <K, D extends DeclaredStatement<?>, N extends StatementNamespace<K, ? extends D, ?>> Prerequisite<D> requiresDeclared(
188 StmtContext<?, ?, ?> context, Class<N> namespace, K key) {
189 final AbstractPrerequisite<StmtContext<?,D,?>> rawContext = requiresCtxImpl(context, namespace, key, FULL_DECLARATION);
190 return rawContext.transform(StmtContextUtils.<D>buildDeclared());
194 public <E extends EffectiveStatement<?, ?>> Prerequisite<E> requiresEffective(StmtContext<?, ?, ? extends E> stmt) {
195 return requiresCtxImpl(stmt, EFFECTIVE_MODEL).transform(StmtContextUtils.<E>buildEffective());
199 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> AbstractPrerequisite<StmtContext<?, ?, E>> requiresEffectiveCtx(
200 StmtContext<?, ?, ?> context, Class<N> namespace, K key) {
201 return requiresCtxImpl(contextImpl(context),namespace,key, EFFECTIVE_MODEL);
205 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> Prerequisite<E> requiresEffective(
206 StmtContext<?, ?, ?> context, Class<N> namespace, K key) {
207 final AbstractPrerequisite<StmtContext<?,?,E>> rawContext = requiresCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
208 return rawContext.transform(StmtContextUtils.<E>buildEffective());
213 public <N extends IdentifierNamespace<?, ?>> Prerequisite<Mutable<?, ?, ?>> mutatesNs(Mutable<?, ?, ?> context,
214 Class<N> namespace) {
216 return addMutation(new NamespaceMutation<N>(contextImpl(context),namespace));
217 } catch (SourceException e) {
218 throw shouldNotHappenProbablyBug(e);
223 public <T extends Mutable<?, ?, ?>> Prerequisite<T> mutatesEffectiveCtx(T stmt) {
224 return mutatesCtx(stmt, EFFECTIVE_MODEL);
229 public <K, E extends EffectiveStatement<?, ?>, N extends StatementNamespace<K, ?, ? extends E>> AbstractPrerequisite<Mutable<?, ?, E>> mutatesEffectiveCtx(
230 StmtContext<?, ?, ?> context, Class<N> namespace, K key) {
231 return mutatesCtxImpl(context, namespace, key, EFFECTIVE_MODEL);
237 public void apply(InferenceAction action) throws InferenceException {
238 this.action = Preconditions.checkNotNull(action);
242 private abstract class AbstractPrerequisite<T> implements Prerequisite<T> {
245 private boolean done = false;
249 Preconditions.checkState(isDone());
254 public boolean isDone() {
258 protected void resolvePrereq(T value) throws InferenceException {
259 Preconditions.checkState(!isDone());
265 protected <O> Prerequisite<O> transform(final Function<? super T,O> transformation) {
267 return new Prerequisite<O>() {
271 return transformation.apply(AbstractPrerequisite.this.get());
275 public boolean isDone() {
276 return AbstractPrerequisite.this.isDone();
284 private class PhaseMutation<C> extends AbstractPrerequisite<C> implements ContextMutation {
286 @SuppressWarnings("unchecked")
287 public PhaseMutation(StatementContextBase<?, ?, ?> context, ModelProcessingPhase phase) throws InferenceException {
288 context.addMutation(phase, this);
289 resolvePrereq((C) context);
293 public boolean isFinished() {
299 private class PhaseFinished<C extends StmtContext<?, ?, ?>> extends AbstractPrerequisite<C> implements OnPhaseFinished {
301 @SuppressWarnings("unchecked")
303 public void phaseFinished(StatementContextBase<?, ?, ?> context, ModelProcessingPhase phase) throws SourceException {
304 resolvePrereq((C) (context));
308 private class NamespaceMutation<N extends IdentifierNamespace<?,?>> extends AbstractPrerequisite<StmtContext.Mutable<?, ?, ?>> {
310 public NamespaceMutation(StatementContextBase<?, ?, ?> ctx, Class<N> namespace) throws InferenceException {
316 private class AddedToNamespace<C extends StmtContext<?,?,?>> extends AbstractPrerequisite<C> implements OnNamespaceItemAdded,OnPhaseFinished {
318 private final ModelProcessingPhase phase;
320 public <K, N extends StatementNamespace<K, ?, ?>> AddedToNamespace(ModelProcessingPhase phase) {
325 public void namespaceItemAdded(StatementContextBase<?, ?, ?> context, Class<?> namespace, Object key,
326 Object value) throws SourceException {
327 StatementContextBase<?, ?, ?> targetContext = (StatementContextBase<?, ?, ?>) value;
328 targetContext.addPhaseCompletedListener(phase, this);
331 @SuppressWarnings("unchecked")
333 public void phaseFinished(StatementContextBase<?, ?, ?> context, ModelProcessingPhase phase) throws SourceException {
334 resolvePrereq((C) context);
339 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(ModelProcessingPhase phase) throws SourceException {
344 Preconditions.checkArgument(phase != null, "Model processing phase must not be null");
345 this.modPhase = phase;
348 @SuppressWarnings("unchecked")
350 public void namespaceItemAdded(StatementContextBase<?, ?, ?> context, Class<?> namespace, Object key,
351 Object value) throws SourceException {
352 context.addMutation(modPhase,this);
353 resolvePrereq((C) context);
357 public boolean isFinished() {