package at.lux.retrieval.graphisomorphism.metrics;
import at.lux.retrieval.graphisomorphism.NodeDistanceFunction;
import org.jdom.Element;
import org.jdom.output.XMLOutputter;
import org.jdom.output.Format;
/*
* This file is part of Caliph & Emir.
*
* Caliph & Emir is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Caliph & Emir 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with Caliph & Emir; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright statement:
* --------------------
* (c) 2002-2006 by Mathias Lux (mathias@juggle.at)
* http://www.juggle.at, http://www.SemanticMetadata.net
*/
/**
* This file is part of Caliph & Emir
* Date: 16.02.2006
* Time: 22:35:05
*
* @author Mathias Lux, mathias@juggle.at
*/
public class BooleanNodeDistanceFunction implements NodeDistanceFunction {
/**
* Boolean distance function: 1 in case of not equal, 0 in case of
* string output equality
* @param node1 first semantic object.
* @param node2 second semantic object.
* @return 1 in case of not equal, 0 in case of string output equality.
*/
public float getDistance(Element node1, Element node2) {
XMLOutputter out = new XMLOutputter(Format.getRawFormat());
String nodeContent1 = out.outputString(node1).trim().replaceAll("id=\"id_[0-9]*\"", "");
String nodeContent2 = out.outputString(node2).trim().replaceAll("id=\"id_[0-9]*\"", "");
float result = 1f;
if (nodeContent1.equals(nodeContent2)) result = 0f;
return result;
}
public float getMaxDistance() {
return 1f;
}
}