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.calculation;
025    
026    import org.ujmp.core.Matrix;
027    import org.ujmp.core.exceptions.MatrixException;
028    import org.ujmp.core.setmatrix.DefaultSetMatrix;
029    import org.ujmp.core.setmatrix.SetMatrix;
030    
031    public class Unique extends AbstractObjectCalculation {
032            private static final long serialVersionUID = -5621298156781794790L;
033    
034            private SetMatrix<Object> uniqueObjects = null;
035    
036            public Unique(Matrix m) {
037                    super(m);
038            }
039    
040            
041            public Object getObject(long... coordinates) throws MatrixException {
042                    createUniqueObjects();
043                    return uniqueObjects.getAsObject(coordinates);
044            }
045    
046            private void createUniqueObjects() {
047                    if (uniqueObjects == null) {
048                            uniqueObjects = new DefaultSetMatrix<Object>();
049                            for (long[] c : getSource().availableCoordinates()) {
050                                    uniqueObjects.add(getSource().getAsObject(c));
051                            }
052                    }
053            }
054    
055            
056            public long[] getSize() {
057                    createUniqueObjects();
058                    return uniqueObjects.getSize();
059            }
060    
061    }