/*
* Copyright 2003-2011 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.smodel;
import jetbrains.mps.util.containers.ManyToManyMap;
import org.jetbrains.mps.openapi.model.SNode;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
public class DependencyRecorder<T> {
private ManyToManyMap<T, SNode> myObjectsToNodes = new ManyToManyMap<T, SNode>();
public void rebuild(T t, Runnable r) {
MyNodeReadListener listener = new MyNodeReadListener();
NodeReadEventsCaster.setNodesReadListener(listener);
try {
r.run();
} finally {
NodeReadEventsCaster.removeNodesReadListener();
}
myObjectsToNodes.clearFirst(t);
for (SNode n : listener.getDependencies()) {
myObjectsToNodes.addLink(t, n);
}
}
public void remove(T t) {
myObjectsToNodes.clearFirst(t);
}
public Set<SNode> getDependencies(T t) {
return myObjectsToNodes.getByFirst(t);
}
public Set<T> getDependOn(SNode n) {
return myObjectsToNodes.getBySecond(n);
}
private class MyNodeReadListener extends AbstractNodesReadListener {
private Set<SNode> myDependencies = new HashSet<SNode>();
private Set<SNode> getDependencies() {
return Collections.unmodifiableSet(myDependencies);
}
@Override
public void nodeChildReadAccess(SNode node, String childRole, SNode child) {
myDependencies.add(node);
}
@Override
public void nodePropertyReadAccess(SNode node, String propertyName, String value) {
myDependencies.add(node);
}
@Override
public void nodeReferentReadAccess(SNode node, String referentRole, SNode referent) {
myDependencies.add(node);
}
@Override
public void nodeUnclassifiedReadAccess(SNode node) {
myDependencies.add(node);
}
}
}