/*******************************************************************************
* 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.IClass;
import com.ibm.wala.classLoader.IField;
import com.ibm.wala.ipa.cha.IClassHierarchy;
import com.ibm.wala.types.TypeReference;
/**
* an instance field pointer key key that carries a type filter
*/
public class InstanceFieldKeyWithFilter extends InstanceFieldKey implements FilteredPointerKey {
private final IClass filter;
public InstanceFieldKeyWithFilter(IClassHierarchy cha, InstanceKey instance, IField field) {
super(instance, field);
if (field == null) {
throw new IllegalArgumentException("field is null");
}
if (cha == null) {
throw new IllegalArgumentException("cha is null");
}
IClass fieldType = cha.lookupClass(field.getFieldTypeReference());
if (fieldType == null) {
// TODO: assertions.unreachable()
this.filter = cha.lookupClass(TypeReference.JavaLangObject);
} else {
this.filter = fieldType;
}
}
/*
* @see com.ibm.wala.ipa.callgraph.propagation.PointerKey#getTypeFilter()
*/
@Override
public TypeFilter getTypeFilter() {
return new SingleClassFilter(filter);
}
}