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.jblas.calculation; 025 026 import org.jblas.DoubleMatrix; 027 import org.ujmp.core.Matrix; 028 import org.ujmp.core.interfaces.HasColumnMajorDoubleArray1D; 029 import org.ujmp.jblas.JBlasDenseDoubleMatrix2D; 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 final DoubleMatrix a2; 039 final DoubleMatrix b2; 040 if (a instanceof JBlasDenseDoubleMatrix2D) { 041 a2 = ((JBlasDenseDoubleMatrix2D) a).getWrappedObject(); 042 } else if (a instanceof HasColumnMajorDoubleArray1D) { 043 a2 = new JBlasDenseDoubleMatrix2D(a.getRowCount(), a 044 .getColumnCount(), ((HasColumnMajorDoubleArray1D) a) 045 .getColumnMajorDoubleArray1D()).getWrappedObject(); 046 } else { 047 a2 = new JBlasDenseDoubleMatrix2D(a).getWrappedObject(); 048 } 049 if (b instanceof JBlasDenseDoubleMatrix2D) { 050 b2 = ((JBlasDenseDoubleMatrix2D) b).getWrappedObject(); 051 } else if (b instanceof HasColumnMajorDoubleArray1D) { 052 b2 = new JBlasDenseDoubleMatrix2D(b.getRowCount(), b 053 .getColumnCount(), ((HasColumnMajorDoubleArray1D) b) 054 .getColumnMajorDoubleArray1D()).getWrappedObject(); 055 } else { 056 b2 = new JBlasDenseDoubleMatrix2D(b).getWrappedObject(); 057 } 058 try { 059 final DoubleMatrix x = org.jblas.Solve.solve(a2, b2); 060 return new JBlasDenseDoubleMatrix2D(x); 061 } catch (final Throwable t) { 062 return org.ujmp.core.doublematrix.calculation.general.decomposition.Solve.UJMPSQUARE 063 .calc(a, b); 064 } 065 } 066 067 }