76 lines
2.1 KiB
Java
76 lines
2.1 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.ipa.callgraph.propagation;
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import java.util.Iterator;
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import com.ibm.wala.classLoader.IClass;
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import com.ibm.wala.classLoader.NewSiteReference;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.callgraph.CallGraph;
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import com.ibm.wala.util.collections.EmptyIterator;
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import com.ibm.wala.util.collections.Pair;
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/**
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* An instance key which represents a unique, constant object.
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*/
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public final class ConstantKey<T> implements InstanceKey {
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private final T value;
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private final IClass valueClass;
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public ConstantKey(T value, IClass valueClass) {
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this.value = value;
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this.valueClass = valueClass;
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assert valueClass != null;
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}
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@Override
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public boolean equals(Object obj) {
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if (obj instanceof ConstantKey) {
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ConstantKey other = (ConstantKey) obj;
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return valueClass.equals(other.valueClass) ? (value == null ? other.value == null : value.equals(other.value)) : false;
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} else {
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return false;
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}
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}
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@Override
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public int hashCode() {
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return value == null ? 65535 : 1877 * value.hashCode();
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}
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@Override
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public String toString() {
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if (value == null)
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return "[ConstantKey:null]";
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else
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return "[ConstantKey:" + value + ":" + valueClass.getReference() + "]";
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}
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/*
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* @see com.ibm.wala.ipa.callgraph.propagation.InstanceKey#getConcreteType()
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*/
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@Override
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public IClass getConcreteType() {
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return valueClass;
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}
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public T getValue() {
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return value;
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}
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@Override
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public Iterator<Pair<CGNode, NewSiteReference>> getCreationSites(CallGraph CG) {
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return EmptyIterator.instance();
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}
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}
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