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.doublematrix.calculation.general.missingvalues; 025 026 import java.lang.reflect.Constructor; 027 028 import org.ujmp.core.Matrix; 029 import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation; 030 import org.ujmp.core.doublematrix.calculation.DoubleCalculation; 031 import org.ujmp.core.doublematrix.calculation.general.missingvalues.Impute.ImputationMethod; 032 import org.ujmp.core.exceptions.MatrixException; 033 034 public class ImputeLS extends AbstractDoubleCalculation { 035 private static final long serialVersionUID = 6803633047911888483L; 036 037 private Matrix imp = null; 038 039 private ImputationMethod method = null; 040 041 public ImputeLS(Matrix matrix, ImputationMethod method) { 042 super(matrix); 043 this.method = method; 044 } 045 046 public static boolean isAvailable() { 047 try { 048 Class.forName("Impute"); 049 } catch (ClassNotFoundException e) { 050 return false; 051 } 052 return true; 053 } 054 055 056 public double getDouble(long... coordinates) throws MatrixException { 057 if (imp == null) { 058 try { 059 060 DoubleCalculation calc = null; 061 062 try { 063 if (calc == null) { 064 Class<?> c = Class.forName("org.ujmp.lsimpute.LSImpute"); 065 Constructor<?> con = c.getConstructor(Matrix.class, ImputationMethod.class); 066 067 calc = (DoubleCalculation) con.newInstance(getSource(), method); 068 } 069 } catch (ClassNotFoundException e) { 070 } 071 072 if (calc == null) { 073 throw new MatrixException("could not find LSimpute.jar in your classpath"); 074 } 075 076 imp = calc.calcNew(); 077 078 } catch (Exception e) { 079 throw new MatrixException(e); 080 } 081 } 082 return imp.getAsDouble(coordinates); 083 } 084 }