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/* EmbeddingSaver.java
* =========================================================================
* This file is part of the GrInvIn project - http://www.grinvin.org
*
* Copyright (C) 2005-2008 Universiteit Gent
*
* This program 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.
*
* This program 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.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.grinvin.io.graphs;
import java.io.IOException;
import java.io.OutputStream;
import org.grinvin.graphs.EmbeddingView;
import org.grinvin.graphs.Vertex;
import org.grinvin.io.LoaderSaverHelper;
import org.jdom.DocType;
import org.jdom.Element;
/**
* Saves a {@link EmbeddingView} as a <tt>embedding.xml</tt>-section
* onto an output stream.
*/
public class EmbeddingSaver {
//
private EmbeddingSaver() { }
/**
* Convert the given embedding to a JDOM-element.
*/
public static Element toElement(EmbeddingView embedding) {
Element element = new Element("embedding");
element.setAttribute("dimension", Integer.toString(embedding.getDimension()));
// vertex coordinates
for (Vertex v: embedding.getPeer().vertices()) {
Element vertex = new Element("coordinates");
vertex.setAttribute("id", Integer.toString(v.getIndex()));
double[] c = embedding.getCoordinates(v);
for (double d : c) {
Element coord = new Element("double");
coord.setAttribute("value", Double.toString(d));
vertex.addContent(coord);
}
element.addContent(vertex);
}
return element;
}
/**
* Save the embedding graph onto the output stream.
* @param out Output stream to which the result shall be written.
*/
public static void save(EmbeddingView embedding, OutputStream out) throws IOException{
LoaderSaverHelper.outputXML(toElement(embedding), new DocType("embedding", "-//GrInvIn IO//Embedding 1.0//EN", "http://downloads.grinvin.org/dtds/io/embedding-1.0.dtd"), out);
}
}
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