49 lines
1.6 KiB
Java
49 lines
1.6 KiB
Java
/*******************************************************************************
|
|
* 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;
|
|
|
|
import com.ibm.wala.analysis.typeInference.PointType;
|
|
import com.ibm.wala.classLoader.IClass;
|
|
import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
|
|
import com.ibm.wala.util.debug.Assertions;
|
|
|
|
/**
|
|
* misc utilities for dealing with contexts
|
|
*/
|
|
public class ContextUtil {
|
|
|
|
/**
|
|
* @param c a context
|
|
* @return If this is an object-sensitive context that identifies a unique class for the receiver object, then return the unique
|
|
* class. Else, return null.
|
|
* @throws IllegalArgumentException if c is null
|
|
*/
|
|
public static IClass getConcreteClassFromContext(Context c) {
|
|
if (c == null) {
|
|
throw new IllegalArgumentException("c is null");
|
|
}
|
|
ContextItem item = c.get(ContextKey.RECEIVER);
|
|
if (item == null) {
|
|
return null;
|
|
} else {
|
|
if (item instanceof PointType) {
|
|
return ((PointType) item).getIClass();
|
|
} else if (item instanceof InstanceKey) {
|
|
return ((InstanceKey) item).getConcreteType();
|
|
} else {
|
|
Assertions.UNREACHABLE("Unexpected: " + item.getClass());
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|