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.ejml.calculation;
025    
026    import org.ejml.data.DenseMatrix64F;
027    import org.ejml.ops.CommonOps;
028    import org.ujmp.core.Matrix;
029    import org.ujmp.ejml.EJMLDenseDoubleMatrix2D;
030    
031    public class Solve
032                    implements
033                    org.ujmp.core.doublematrix.calculation.general.decomposition.Solve<Matrix> {
034    
035            public static Solve INSTANCE = new Solve();
036    
037            public Matrix calc(Matrix a, Matrix b) {
038                    DenseMatrix64F a2 = null;
039                    DenseMatrix64F b2 = null;
040                    if (a instanceof EJMLDenseDoubleMatrix2D) {
041                            a2 = ((EJMLDenseDoubleMatrix2D) a).getWrappedObject();
042                    } else {
043                            a2 = new EJMLDenseDoubleMatrix2D(a).getWrappedObject();
044                    }
045                    if (b instanceof EJMLDenseDoubleMatrix2D) {
046                            b2 = ((EJMLDenseDoubleMatrix2D) b).getWrappedObject();
047                    } else {
048                            b2 = new EJMLDenseDoubleMatrix2D(b).getWrappedObject();
049                    }
050                    DenseMatrix64F x = new DenseMatrix64F(a2.numCols, b2.numCols);
051                    CommonOps.solve(a2, b2, x);
052                    return new EJMLDenseDoubleMatrix2D(x);
053            }
054    }