001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.jmatio; 025 026 import java.io.File; 027 import java.io.IOException; 028 import java.util.Map; 029 030 import org.ujmp.core.Matrix; 031 import org.ujmp.core.exceptions.MatrixException; 032 033 import com.jmatio.io.MatFileReader; 034 import com.jmatio.types.MLArray; 035 import com.jmatio.types.MLDouble; 036 037 public class ImportMatrixMAT { 038 039 public static Matrix fromFile(File file, Object... parameters) throws IOException { 040 String key = null; 041 if (parameters != null && parameters.length > 0 && parameters[0] instanceof String) { 042 key = (String) parameters[0]; 043 } 044 MatFileReader reader = new MatFileReader(); 045 Map<String, MLArray> map = reader.read(file); 046 if (key == null) { 047 key = map.keySet().iterator().next(); 048 } 049 MLArray array = map.get(key); 050 if (array == null) { 051 throw new MatrixException("matrix with label [" + key + "] was not found in .mat file"); 052 } else if (array instanceof MLDouble) { 053 return new MLDoubleMatrix((MLDouble) array); 054 } else { 055 throw new MatrixException("This type is not yet supported: " + array.getClass()); 056 } 057 } 058 059 }