ExportMatrixGML.java example

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universal-java-matrix-package-master
/*
 * Copyright (C) 2008-2015 by Holger Arndt
 *
 * This file is part of the Universal Java Matrix Package (UJMP).
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership and licensing.
 *
 * UJMP is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * UJMP 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with UJMP; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

package org.ujmp.core.io;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

import org.ujmp.core.Matrix;
import org.ujmp.core.util.io.IntelligentFileWriter;

public class ExportMatrixGML {

	public static final void toFile(File file, Matrix m, Object... parameters) throws IOException {
		IntelligentFileWriter w = new IntelligentFileWriter(file);
		toWriter(w, m, parameters);
		w.close();
	}

	public static final void toStream(OutputStream out, Matrix m, Object... parameters)
			throws IOException {
		OutputStreamWriter w = new OutputStreamWriter(out);
		toWriter(w, m, parameters);
		w.close();
	}

	public static final void toWriter(Writer w, Matrix m, Object... parameters) throws IOException {
		w.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
		w.write("<graphml>\n");
		w.write("<key id=\"k0\" for=\"node\" attr.name=\"variableName\" attr.type=\"string\"></key>\n");
		w.write("<key id=\"k1\" for=\"node\" attr.name=\"description\" attr.type=\"string\"></key>\n");
		w.write("<key id=\"k2\" for=\"edge\" attr.name=\"confidence\" attr.type=\"double\"><default>0.0</default></key>\n");
		w.write("<key id=\"k3\" for=\"edge\" attr.name=\"directed\" attr.type=\"boolean\"><default>false</default></key>\n");
		w.write("<key id=\"k5\" for=\"node\" attr.name=\"xPos\" attr.type=\"string\"></key>\n");
		w.write("<key id=\"k6\" for=\"node\" attr.name=\"yPos\" attr.type=\"string\"></key>\n");

		w.write("<graph id=\"" + m.getLabel() + "\" edgedefault=\"undirected\">\n");

		for (int i = 0; i < m.getRowCount(); i++) {
			w.write("<node id=\"node" + i + "\">\n");
			w.write("<data key=\"k0\">" + m.getRowLabel(i).replaceAll("[<>&]", "") + "</data>\n");
			// w.write("<data key=\"k5\">" + n.getPosX() + "</data>\n");
			// w.write("<data key=\"k6\">" + n.getPosY() + "</data>\n");
			w.write("</node>\n");
		}

		int id = 0;
		for (long[] c : m.allCoordinates()) {
			if (m.getAsDouble(c) > 0.0) {
				w.write("<edge id=\"edge" + (id++) + "\" ");
				w.write("source=\"node" + c[Matrix.ROW] + "\" ");
				w.write("target=\"node" + c[Matrix.COLUMN] + "\">\n");
				w.write("</edge>\n");
			}
		}
		w.write("</graph>\n");
		w.write("</graphml>");
		w.close();
	}

}