/*******************************************************************************
* Copyright (c) 2009 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.cha;
import com.ibm.wala.classLoader.IClass;
import com.ibm.wala.classLoader.IMethod;
import com.ibm.wala.types.MethodReference;
/**
* Utilities for querying a class hierarchy
*/
public class ClassHierarchyUtil {
/**
* find the root of the inheritance tree for method m.
*/
public static IMethod getRootOfInheritanceTree(IMethod m) {
IClass c = m.getDeclaringClass();
IClass parent = c.getSuperclass();
if (parent == null) {
return m;
} else {
MethodReference ref = MethodReference.findOrCreate(parent.getReference(), m.getSelector());
IMethod m2 = m.getClassHierarchy().resolveMethod(ref);
if (m2 != null && !m2.equals(m)) {
return getRootOfInheritanceTree(m2);
}
return m;
}
}
/**
* Return the method that m overrides, or null if none
*/
public static IMethod getOverriden(IMethod m) {
IClass c = m.getDeclaringClass();
IClass parent = c.getSuperclass();
if (parent == null) {
return null;
} else {
MethodReference ref = MethodReference.findOrCreate(parent.getReference(), m.getSelector());
IMethod m2 = m.getClassHierarchy().resolveMethod(ref);
if (m2 != null && !m2.equals(m)) {
return m2;
}
return null;
}
}
}