/*
* 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.jmatio;
import java.io.File;
import java.io.IOException;
import java.util.Map;
import org.ujmp.core.Matrix;
import com.jmatio.io.MatFileReader;
import com.jmatio.types.MLArray;
import com.jmatio.types.MLDouble;
public class ImportMatrixMAT {
public static Matrix fromFile(File file, Object... parameters) throws IOException {
String key = null;
if (parameters != null && parameters.length > 0 && parameters[0] instanceof String) {
key = (String) parameters[0];
}
MatFileReader reader = new MatFileReader();
Map<String, MLArray> map = reader.read(file);
if (key == null) {
key = map.keySet().iterator().next();
}
MLArray array = map.get(key);
if (array == null) {
throw new RuntimeException("matrix with label [" + key + "] was not found in .mat file");
} else if (array instanceof MLDouble) {
return new MLDenseDoubleMatrix((MLDouble) array);
} else {
throw new RuntimeException("This type is not yet supported: " + array.getClass());
}
}
}