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.objectmatrix.impl;
025    
026    import java.util.Map;
027    
028    import org.ujmp.core.Coordinates;
029    import org.ujmp.core.Matrix;
030    import org.ujmp.core.collections.SoftHashMap;
031    import org.ujmp.core.exceptions.MatrixException;
032    import org.ujmp.core.objectmatrix.stub.AbstractSparseObjectMatrix;
033    import org.ujmp.core.util.CoordinateSetToLongWrapper;
034    
035    public class VolatileSparseObjectMatrix extends AbstractSparseObjectMatrix {
036            private static final long serialVersionUID = 392817709394048419L;
037    
038            private final Map<Coordinates, Object> values = new SoftHashMap<Coordinates, Object>();
039    
040            private long[] size = null;
041    
042            public VolatileSparseObjectMatrix(Matrix m) throws MatrixException {
043                    this.size = Coordinates.copyOf(m.getSize());
044                    for (long[] c : m.allCoordinates()) {
045                            setAsDouble(m.getAsDouble(c), c);
046                    }
047            }
048    
049            public boolean isTransient() {
050                    return true;
051            }
052    
053            public VolatileSparseObjectMatrix(long... size) {
054                    this.size = Coordinates.copyOf(size);
055            }
056    
057            public long[] getSize() {
058                    return size;
059            }
060    
061            public Object getObject(long... coordinates) {
062                    return values.get(new Coordinates(coordinates));
063            }
064    
065            public long getValueCount() {
066                    return values.size();
067            }
068    
069            public void setObject(Object value, long... coordinates) {
070                    values.put(new Coordinates(coordinates), value);
071            }
072    
073            public Iterable<long[]> entries() {
074                    return new CoordinateSetToLongWrapper(values.keySet());
075            }
076    
077            public boolean contains(long... coordinates) {
078                    return values.containsKey(new Coordinates(coordinates));
079            }
080    
081    }