81 lines
3.1 KiB
Java
81 lines
3.1 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.j2ee;
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import com.ibm.wala.analysis.reflection.JavaTypeContext;
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import com.ibm.wala.analysis.typeInference.TypeAbstraction;
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import com.ibm.wala.classLoader.CallSiteReference;
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import com.ibm.wala.classLoader.IMethod;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.callgraph.Context;
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import com.ibm.wala.ipa.callgraph.ContextSelector;
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import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
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import com.ibm.wala.j2ee.util.ReceiverTypeInference;
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import com.ibm.wala.j2ee.util.ReceiverTypeInferenceCache;
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import com.ibm.wala.types.ClassLoaderReference;
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import com.ibm.wala.types.Descriptor;
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import com.ibm.wala.types.MemberReference;
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import com.ibm.wala.types.MethodReference;
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import com.ibm.wala.types.TypeName;
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import com.ibm.wala.types.TypeReference;
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import com.ibm.wala.util.intset.EmptyIntSet;
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import com.ibm.wala.util.intset.IntSet;
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import com.ibm.wala.util.strings.Atom;
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/**
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* This class provides context selection logic for special J2EE methods.
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*/
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public class J2EEContextSelector implements ContextSelector {
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private static final TypeName CacheableCommandImpl = TypeName.string2TypeName("Lcom/ibm/websphere/command/CacheableCommandImpl");
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private static final Atom ExecuteAtom = Atom.findOrCreateAsciiAtom("execute");
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private final static Descriptor ExecuteDesc = Descriptor.findOrCreateUTF8("()V");
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private final static TypeReference CacheableCommandImplClass = TypeReference.findOrCreate(ClassLoaderReference.Extension,
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CacheableCommandImpl);
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public final static MemberReference ExecuteMethod = MethodReference.findOrCreate(CacheableCommandImplClass, ExecuteAtom,
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ExecuteDesc);
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private final ReceiverTypeInferenceCache typeInference;
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public J2EEContextSelector(ReceiverTypeInferenceCache typeInference) {
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this.typeInference = typeInference;
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}
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/**
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* Analyze each call to Command.execute() in a different context
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*/
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public Context getCalleeTarget(CGNode caller, CallSiteReference site, IMethod callee, InstanceKey[] receiver) {
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if (callee.getReference().equals(ExecuteMethod)) {
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ReceiverTypeInference R = typeInference.findOrCreate(caller);
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if (R == null) {
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return null;
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}
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TypeAbstraction type = R.getReceiverType(site);
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if (type == null) {
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// Type inference failed; raise a severe warning
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return null;
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}
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return new JavaTypeContext(type);
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} else {
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return null;
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}
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}
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public IntSet getRelevantParameters(CGNode caller, CallSiteReference site) {
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return EmptyIntSet.instance;
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}
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}
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