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.collections;
025    
026    import java.io.File;
027    import java.io.IOException;
028    import java.io.InputStream;
029    import java.io.OutputStream;
030    import java.io.Serializable;
031    
032    import org.ujmp.core.util.SerializationUtil;
033    
034    public class SerializedObjectMap<K, V> extends AbstractDiskMap<K, V> {
035            private static final long serialVersionUID = -1969661697021465379L;
036    
037            public SerializedObjectMap() throws IOException {
038                    this((File) null, true);
039            }
040    
041            public SerializedObjectMap(String path) throws IOException {
042                    this(new File(path), true);
043            }
044    
045            public SerializedObjectMap(boolean useGZip) throws IOException {
046                    this((File) null, useGZip);
047            }
048    
049            public SerializedObjectMap(String path, boolean useGZip) throws IOException {
050                    this(new File(path), useGZip);
051            }
052    
053            public SerializedObjectMap(File path) throws IOException {
054                    this(path, true);
055            }
056    
057            public SerializedObjectMap(File path, boolean useGZip) throws IOException {
058                    super(path, useGZip);
059            }
060    
061            public final void writeValue(OutputStream os, V value) {
062                    try {
063                            SerializationUtil.serialize((Serializable) value, os);
064                    } catch (Exception e) {
065                            e.printStackTrace();
066                    }
067            }
068    
069            @SuppressWarnings("unchecked")
070            public V readValue(InputStream is) {
071                    try {
072                            return (V) SerializationUtil.deserialize(is);
073                    } catch (Exception e) {
074                            e.printStackTrace();
075                            return null;
076                    }
077            }
078    
079    }