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.bytematrix.impl;
025    
026    import org.ujmp.core.Matrix;
027    import org.ujmp.core.bytematrix.stub.AbstractDenseByteMatrix2D;
028    import org.ujmp.core.doublematrix.impl.DefaultDenseDoubleMatrix2D;
029    import org.ujmp.core.exceptions.MatrixException;
030    import org.ujmp.core.interfaces.HasColumnMajorByteArray1D;
031    
032    public class DefaultDenseByteMatrix2D extends AbstractDenseByteMatrix2D implements HasColumnMajorByteArray1D {
033            private static final long serialVersionUID = -7637602510970244322L;
034    
035            private byte[] values = null;
036    
037            private long[] size = null;
038    
039            private int rows = 0;
040    
041            private int cols = 0;
042    
043            public DefaultDenseByteMatrix2D(Matrix m) throws MatrixException {
044                    this.rows = (int) m.getRowCount();
045                    this.cols = (int) m.getColumnCount();
046                    this.size = new long[] { rows, cols };
047                    if (m instanceof DefaultDenseByteMatrix2D) {
048                            byte[] v = ((DefaultDenseByteMatrix2D) m).values;
049                            this.values = new byte[v.length];
050                            System.arraycopy(v, 0, this.values, 0, v.length);
051                    } else {
052                            this.values = new byte[rows * cols];
053                            for (long[] c : m.allCoordinates()) {
054                                    setByte(m.getAsByte(c), c);
055                            }
056                    }
057            }
058    
059            public DefaultDenseByteMatrix2D(long... size) {
060                    this.rows = (int) size[ROW];
061                    this.cols = (int) size[COLUMN];
062                    this.size = new long[] { rows, cols };
063                    this.values = new byte[rows * cols];
064            }
065    
066            public DefaultDenseByteMatrix2D(byte[] v, int rows, int cols) {
067                    this.rows = rows;
068                    this.cols = cols;
069                    this.size = new long[] { rows, cols };
070                    this.values = v;
071            }
072    
073            public long[] getSize() {
074                    return size;
075            }
076    
077            
078            public long getRowCount() {
079                    return rows;
080            }
081    
082            
083            public long getColumnCount() {
084                    return cols;
085            }
086    
087            public byte getByte(long row, long column) {
088                    return values[(int) (column * rows + row)];
089            }
090    
091            public void setByte(byte value, long row, long column) {
092                    values[(int) (column * rows + row)] = value;
093            }
094    
095            public byte getByte(int row, int column) {
096                    return values[column * rows + row];
097            }
098    
099            public void setByte(byte value, int row, int column) {
100                    values[column * rows + row] = value;
101            }
102    
103            
104            public final Matrix plus(double v) {
105                    double[] result = new double[values.length];
106                    for (int i = result.length; --i != -1;) {
107                            result[i] = values[i] + v;
108                    }
109                    return new DefaultDenseDoubleMatrix2D(result, rows, cols);
110            }
111    
112            
113            public final Matrix minus(double v) {
114                    double[] result = new double[values.length];
115                    for (int i = result.length; --i != -1;) {
116                            result[i] = values[i] - v;
117                    }
118                    return new DefaultDenseDoubleMatrix2D(result, rows, cols);
119            }
120    
121            
122            public final Matrix times(double v) {
123                    double[] result = new double[values.length];
124                    for (int i = result.length; --i != -1;) {
125                            result[i] = values[i] * v;
126                    }
127                    return new DefaultDenseDoubleMatrix2D(result, rows, cols);
128            }
129    
130            
131            public final Matrix divide(double v) {
132                    double[] result = new double[values.length];
133                    for (int i = result.length; --i != -1;) {
134                            result[i] = values[i] / v;
135                    }
136                    return new DefaultDenseDoubleMatrix2D(result, rows, cols);
137            }
138    
139            
140            public final Matrix copy() throws MatrixException {
141                    byte[] result = new byte[values.length];
142                    System.arraycopy(values, 0, result, 0, values.length);
143                    Matrix m = new DefaultDenseByteMatrix2D(result, rows, cols);
144                    if (getAnnotation() != null) {
145                            m.setAnnotation(getAnnotation().clone());
146                    }
147                    return m;
148            }
149    
150            
151            public final Matrix transpose() {
152                    final byte[] result = new byte[cols * rows];
153                    for (int c = rows; --c != -1;) {
154                            for (int r = cols; --r != -1;) {
155                                    result[c * cols + r] = values[r * rows + c];
156                            }
157                    }
158                    return new DefaultDenseByteMatrix2D(result, cols, rows);
159            }
160    
161            
162            public byte[] getColumnMajorByteArray1D() {
163                    return values;
164            }
165    
166    }