/*******************************************************************************
* 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.classLoader.IField;
/**
* An pointer key which represents a unique set for a field associated with a set of instances.
*/
public class InstanceFieldKey extends AbstractFieldPointerKey {
private final IField field;
public InstanceFieldKey(InstanceKey instance, IField field) {
super(instance);
if (field == null) {
throw new IllegalArgumentException("field is null");
}
if (instance == null) {
throw new IllegalArgumentException("instance is null");
}
this.field = field;
}
@Override
public boolean equals(Object obj) {
if (obj instanceof InstanceFieldKey) {
if (obj.getClass().equals(getClass())) {
InstanceFieldKey other = (InstanceFieldKey) obj;
boolean result = field.equals(other.field) && instance.equals(other.instance);
return result;
} else {
return false;
}
} else {
return false;
}
}
@Override
public int hashCode() {
return 6229 * field.hashCode() + instance.hashCode();
}
@Override
public String toString() {
return "[" + instance + "," + field + "]";
}
public IField getField() {
return field;
}
}