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.exceptions.MatrixException;
032    
033    public class ImputeBPCA extends AbstractDoubleCalculation {
034            private static final long serialVersionUID = 6803633047911888483L;
035    
036            private Matrix imp = null;
037    
038            public ImputeBPCA(Matrix matrix) {
039                    super(matrix);
040            }
041    
042            public static boolean isAvailable() {
043                    try {
044                            Class.forName("JBPCAfill");
045                    } catch (ClassNotFoundException e) {
046                            return false;
047                    }
048                    return true;
049            }
050    
051            public double getDouble(long... coordinates) throws MatrixException {
052                    if (imp == null) {
053                            try {
054    
055                                    DoubleCalculation calc = null;
056    
057                                    try {
058                                            if (calc == null) {
059                                                    Class<?> c = Class.forName("org.ujmp.jbpcafill.ImputeBPCA");
060                                                    Constructor<?> con = c.getConstructor(Matrix.class);
061                                                    calc = (DoubleCalculation) con.newInstance(getSource());
062                                            }
063                                    } catch (ClassNotFoundException e) {
064                                    }
065    
066                                    if (calc == null) {
067                                            throw new MatrixException("could not find JBPCAfill.jar in your classpath");
068                                    }
069    
070                                    imp = calc.calcNew();
071    
072                            } catch (Exception e) {
073                                    throw new MatrixException(e);
074                            }
075                    }
076                    return imp.getAsDouble(coordinates);
077            }
078    
079    }