82 lines
2.4 KiB
Java
82 lines
2.4 KiB
Java
/******************************************************************************
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* Copyright (c) 2002 - 2014 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.HashMap;
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import java.util.Map;
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import com.ibm.wala.ipa.callgraph.Context;
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import com.ibm.wala.ipa.callgraph.ContextItem;
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import com.ibm.wala.ipa.callgraph.ContextKey;
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/**
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* A selective Cartesian product context that enforces object sensitivity on some set
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* of parameter positions.
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*/
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public class SelectiveCPAContext implements Context {
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// base context
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protected final Context base;
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// maps parameters to their abstract objects
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private final Map<ContextKey, InstanceKey> parameterObjs;
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// cached hash code
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private final int hashCode;
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// helper method for constructing the parameterObjs map
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private static Map<ContextKey, InstanceKey> makeMap(InstanceKey[] x) {
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Map<ContextKey, InstanceKey> result = new HashMap<ContextKey, InstanceKey>();
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for(int i = 0; i < x.length; i++) {
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if (x[i] != null) {
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result.put(ContextKey.PARAMETERS[i], x[i]);
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}
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}
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return result;
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}
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public SelectiveCPAContext(Context base, InstanceKey[] x) {
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this(base, makeMap(x));
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}
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public SelectiveCPAContext(Context base, Map<ContextKey, InstanceKey> parameterObjs) {
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this.base = base;
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this.parameterObjs = parameterObjs;
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hashCode = base.hashCode() ^ parameterObjs.hashCode();
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}
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@Override
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public ContextItem get(ContextKey name) {
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if (parameterObjs.containsKey(name)) {
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return new FilteredPointerKey.SingleInstanceFilter(parameterObjs.get(name));
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} else {
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return base.get(name);
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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 hashCode;
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}
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@Override
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public boolean equals(Object other) {
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if (this == other) {
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return true;
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}
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return other != null &&
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getClass().equals(other.getClass()) &&
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base.equals(((SelectiveCPAContext)other).base) &&
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parameterObjs.equals(((SelectiveCPAContext)other).parameterObjs);
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}
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} |