/******************************************************************************
* Copyright (c) 2002 - 2014 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.cfg.exc.intra;
import com.ibm.wala.cfg.IBasicBlock;
import com.ibm.wala.ipa.cfg.EdgeFilter;
import com.ibm.wala.util.graph.Graph;
/**
* An EdgeFilter that ignores all edges contained in a given graph. This ca be used
* to subtract a subgraph from its main graph.
*
* @author Juergen Graf <graf@kit.edu>
*
*/
public class NegativeGraphFilter<T extends IBasicBlock<?>> implements EdgeFilter<T> {
private final Graph<T> deleted;
public NegativeGraphFilter(Graph<T> deleted) {
this.deleted = deleted;
}
/* (non-Javadoc)
* @see com.ibm.wala.ipa.cfg.EdgeFilter#hasExceptionalEdge(com.ibm.wala.cfg.IBasicBlock, com.ibm.wala.cfg.IBasicBlock)
*/
@Override
public boolean hasExceptionalEdge(T src, T dst) {
return !deleted.hasEdge(src, dst);
}
/* (non-Javadoc)
* @see com.ibm.wala.ipa.cfg.EdgeFilter#hasNormalEdge(com.ibm.wala.cfg.IBasicBlock, com.ibm.wala.cfg.IBasicBlock)
*/
@Override
public boolean hasNormalEdge(T src, T dst) {
return !deleted.hasEdge(src, dst);
}
}