/*******************************************************************************
* 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.cfa;
import com.ibm.wala.classLoader.CallSiteReference;
import com.ibm.wala.classLoader.IMethod;
import com.ibm.wala.ipa.callgraph.CGNode;
import com.ibm.wala.ipa.callgraph.Context;
import com.ibm.wala.ipa.callgraph.ContextSelector;
import com.ibm.wala.ipa.callgraph.impl.Everywhere;
import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
import com.ibm.wala.util.intset.IntSet;
/**
* This is a context selector that adds one level of calling context to a base context selector.
*/
public class OneLevelSiteContextSelector implements ContextSelector {
private final ContextSelector baseSelector;
/**
* @param baseSelector a context selector which provides the context to analyze a method in, but without one level of calling
* context.
*/
public OneLevelSiteContextSelector(ContextSelector baseSelector) {
if (baseSelector == null) {
throw new IllegalArgumentException("null baseSelector");
}
this.baseSelector = baseSelector;
}
@Override
public Context getCalleeTarget(CGNode caller, CallSiteReference site, IMethod callee, InstanceKey[] receiver) {
Context baseContext = baseSelector.getCalleeTarget(caller, site, callee, receiver);
if (baseContext.equals(Everywhere.EVERYWHERE)) {
return new CallerSiteContext(caller, site);
} else {
return new CallerSiteContextPair(caller, site, baseContext);
}
}
@Override
public IntSet getRelevantParameters(CGNode caller, CallSiteReference site) {
return baseSelector.getRelevantParameters(caller, site);
}
}