/*
* AbstractReachabilityTree.java - This file is part of the Jakstab project.
* Copyright 2007-2015 Johannes Kinder <jk@jakstab.org>
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, see <http://www.gnu.org/licenses/>.
*/
package org.jakstab.analysis;
import java.util.*;
import org.jakstab.cfa.CFAEdge;
import org.jakstab.util.*;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.SetMultimap;
/**
* Stores relationships among states in the abstract state space.
* FIXME: This is no longer a tree and not used as an ART. The functionality
* of this class needs to be merged with ReachedSet
*
* @author Johannes Kinder
*/
public class AbstractReachabilityTree {
@SuppressWarnings("unused")
private static final Logger logger = Logger.getLogger(AbstractReachabilityTree.class);
private AbstractState root;
private SetMultimap<AbstractState, Pair<CFAEdge, AbstractState>> parentChildrenMap;
private Map<AbstractState, AbstractState> childParentMap;
public AbstractReachabilityTree() {
parentChildrenMap = HashMultimap.create();
childParentMap = new HashMap<AbstractState, AbstractState>();
}
/**
* Get the ART root.
*
* @return the root of the ART.
*/
public AbstractState getRoot() {
return root;
}
public void setRoot(AbstractState root) {
this.root = root;
addChild(null, null, root);
}
public Set<Pair<CFAEdge, AbstractState>> getChildren(AbstractState parent) {
return parentChildrenMap.get(parent);
}
public AbstractState getParent(AbstractState child) {
return childParentMap.get(child);
}
public void addChild(AbstractState parent, CFAEdge e, AbstractState child) {
//logger.debug("Adding child " + child.getIdentifier() + " to " + (parent == null ? "null" : parent.getIdentifier()));
assert childParentMap.isEmpty() || parent != null;
parentChildrenMap.put(parent, Pair.create(e, child));
childParentMap.put(child, parent);
//assert (isTree()) : "ART lost tree property!";
}
public boolean isInChildParentMap(AbstractState a) {
return childParentMap.containsKey(a);
}
public boolean isInParentChildrenMap(AbstractState a) {
return parentChildrenMap.containsKey(a);
}
}