/*
* Copyright (C) 2008-2015 by Holger Arndt
*
* This file is part of the Universal Java Matrix Package (UJMP).
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership and licensing.
*
* UJMP is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* UJMP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with UJMP; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
package org.ujmp.ojalgo.calculation;
import org.ojalgo.matrix.decomposition.LU;
import org.ojalgo.matrix.decomposition.LUDecomposition;
import org.ojalgo.matrix.decomposition.QR;
import org.ojalgo.matrix.decomposition.QRDecomposition;
import org.ojalgo.matrix.store.PrimitiveDenseStore;
import org.ujmp.core.Matrix;
import org.ujmp.ojalgo.OjalgoDenseDoubleMatrix2D;
public class Solve implements org.ujmp.core.doublematrix.calculation.general.decomposition.Solve<Matrix> {
public static Solve INSTANCE = new Solve();
public Matrix calc(Matrix a, Matrix b) {
PrimitiveDenseStore a2 = null;
PrimitiveDenseStore b2 = null;
if (a instanceof OjalgoDenseDoubleMatrix2D) {
a2 = ((OjalgoDenseDoubleMatrix2D) a).getWrappedObject();
} else {
a2 = new OjalgoDenseDoubleMatrix2D(a).getWrappedObject();
}
if (b instanceof OjalgoDenseDoubleMatrix2D) {
b2 = ((OjalgoDenseDoubleMatrix2D) b).getWrappedObject();
} else {
b2 = new OjalgoDenseDoubleMatrix2D(b).getWrappedObject();
}
if (a.isSquare()) {
final LU<Double> lu = LUDecomposition.makePrimitive();
lu.compute(a2);
return new OjalgoDenseDoubleMatrix2D(lu.solve(b2));
} else {
final QR<Double> qr = QRDecomposition.makePrimitive();
qr.compute(a2);
return new OjalgoDenseDoubleMatrix2D(qr.solve(b2));
}
}
}