/*
* 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.typesystem.inference.util;
import jetbrains.mps.lang.pattern.util.IMatchModifier;
import jetbrains.mps.lang.pattern.util.MatchingUtil;
import jetbrains.mps.smodel.MPSModuleRepository;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeUtil;
import java.lang.ref.WeakReference;
public class CacheNodeHandler {
private WeakReference<SNode> myNodeRef;
private int myHash;
public CacheNodeHandler(SNode node) {
myNodeRef = new WeakReference<SNode>(node);
myHash = MatchingUtil.hash(node);
}
public int hashCode() {
return myHash;
}
public boolean equals(Object obj) {
if (obj instanceof CacheNodeHandler) {
CacheNodeHandler anotherHandler = (CacheNodeHandler) obj;
if (getNode() == null || anotherHandler.getNode() == null) {
return false;
}
return MatchingUtil.matchNodes(this.getNode(), anotherHandler.getNode(), IMatchModifier.DEFAULT, false);
} else {
return false;
}
}
public String toString() {
return "handler " + String.valueOf(getNode());
}
protected SNode getNode() {
return myNodeRef.get();
}
}