/*******************************************************************************
* Copyright (c) 2002 - 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.ipa.callgraph.propagation;
import com.ibm.wala.ipa.callgraph.CGNode;
/**
* A key which represents a set corresponding to a call graph node.
*/
public abstract class NodeKey extends AbstractLocalPointerKey {
private final CGNode node;
protected NodeKey(CGNode node) {
if (node == null) {
throw new IllegalArgumentException("null node");
}
this.node = node;
}
protected boolean internalEquals(Object obj) {
if (obj instanceof NodeKey) {
NodeKey other = (NodeKey) obj;
return node.equals(other.node);
} else {
return false;
}
}
protected int internalHashCode() {
return node.hashCode() * 1621;
}
/**
* @return the node this key represents
*/
@Override
public CGNode getNode() {
return node;
}
@Override
public abstract boolean equals(Object obj);
@Override
public abstract int hashCode();
}