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.core.io;
025    
026    import java.io.BufferedOutputStream;
027    import java.io.File;
028    import java.io.FileOutputStream;
029    import java.io.IOException;
030    import java.io.ObjectOutputStream;
031    import java.io.OutputStream;
032    
033    import org.ujmp.core.Matrix;
034    import org.ujmp.core.enums.ValueType;
035    
036    public class ExportMatrixSER {
037    
038            public static final void toFile(File file, Matrix m, Object... parameters) throws IOException {
039                    FileOutputStream out = new FileOutputStream(file);
040                    toStream(out, m, parameters);
041                    out.close();
042            }
043    
044            public static final void toStream(OutputStream stream, Matrix m, Object... parameters)
045                            throws IOException {
046                    ObjectOutputStream s = new ObjectOutputStream(new BufferedOutputStream(stream));
047    
048                    long[] size = m.getSize();
049                    int sizeLength = size.length;
050                    ValueType valueType = m.getValueType();
051    
052                    s.writeObject(valueType);
053                    s.writeBoolean(m.isSparse());
054                    s.writeInt(sizeLength);
055                    for (int i = 0; i < sizeLength; i++) {
056                            s.writeLong(size[i]);
057                    }
058    
059                    for (long[] c : m.availableCoordinates()) {
060                            s.writeBoolean(true); // hasNext
061                            for (int i = 0; i < sizeLength; i++) {
062                                    s.writeLong(c[i]);
063                            }
064                            switch (valueType) {
065                            case DOUBLE:
066                                    s.writeDouble(m.getAsDouble(c));
067                                    break;
068                            case INT:
069                                    s.writeInt(m.getAsInt(c));
070                                    break;
071                            default:
072                                    s.writeObject(m.getAsObject(c));
073                                    break;
074                            }
075                    }
076                    s.writeBoolean(false); // hasNext
077                    s.close();
078            }
079    
080    }