/*
* Copyright 2003-2014 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.findUsages;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeReference;
import org.jetbrains.mps.openapi.model.SNodeUtil;
import org.jetbrains.mps.openapi.model.SReference;
import org.jetbrains.mps.openapi.util.Consumer;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
/**
* Find and report usages of given nodes throughout models.
* @author Artem Tikhomirov
*/
public class NodeUsageFinder {
private final Set<SNodeReference> myNodesToFind;
private final Consumer<SReference> myOutcomeConsumer;
public NodeUsageFinder(@NotNull Collection<SNode> nodesToFind, @NotNull Consumer<SReference> outcomeConsumer) {
myNodesToFind = new HashSet<SNodeReference>();
for (SNode n : nodesToFind) {
myNodesToFind.add(n.getReference());
}
myOutcomeConsumer = outcomeConsumer;
}
public void collectUsages(SModel model) {
for (SNode node : SNodeUtil.getDescendants(model)) {
collectUsages(node);
}
}
private void collectUsages(SNode current) {
for (SReference ref : current.getReferences()) {
if (myNodesToFind.contains(ref.getTargetNodeReference())) {
myOutcomeConsumer.consume(ref);
}
}
}
}