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.Coordinates;
027    import org.ujmp.core.Matrix;
028    import org.ujmp.core.exceptions.MatrixException;
029    
030    public class Flipdim extends AbstractObjectCalculation {
031            private static final long serialVersionUID = -4669640817211533725L;
032    
033            public Flipdim(int dimension, Matrix m) {
034                    super(dimension, m);
035            }
036    
037            
038            public Object getObject(long... coordinates) throws MatrixException {
039                    coordinates = Coordinates.copyOf(coordinates);
040                    long newValue = getSize()[getDimension()] - coordinates[getDimension()] - 1;
041                    coordinates[getDimension()] = newValue;
042                    return getSource().getAsObject(coordinates);
043            }
044    
045            public final Matrix calcOrig() throws MatrixException {
046                    long size = getSize()[getDimension()];
047                    long max = size / 2;
048                    Matrix m = getSource();
049                    for (long i = 0; i < max; i++) {
050                            m.swap(Ret.ORIG, getDimension(), i, size - i - 1);
051                    }
052                    return getSource();
053            }
054    }