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.io;
025    
026    import java.io.File;
027    import java.io.FileInputStream;
028    import java.io.IOException;
029    import java.io.InputStream;
030    import java.io.InputStreamReader;
031    import java.io.Reader;
032    import java.io.StringReader;
033    
034    import org.ujmp.core.Matrix;
035    import org.ujmp.core.MatrixFactory;
036    import org.ujmp.core.enums.ValueType;
037    import org.ujmp.core.exceptions.MatrixException;
038    import org.ujmp.core.util.io.IntelligentFileReader;
039    
040    public abstract class ImportMatrixSTRING {
041    
042            public static final Matrix fromString(String string, Object... parameters)
043                            throws MatrixException {
044                    StringReader sr = new StringReader(string);
045                    IntelligentFileReader r = new IntelligentFileReader(sr);
046                    Matrix m = fromReader(r);
047                    r.close();
048                    return m;
049            }
050    
051            public static final Matrix fromStream(InputStream stream, Object... parameters)
052                            throws MatrixException, IOException {
053                    InputStreamReader r = new InputStreamReader(stream, "UTF-8");
054                    Matrix m = fromReader(r, parameters);
055                    r.close();
056                    return m;
057            }
058    
059            public static final Matrix fromFile(File file, Object... parameters) throws MatrixException,
060                            IOException {
061                    FileInputStream lr = new FileInputStream(file);
062                    Matrix m = fromStream(lr, parameters);
063                    m.setLabel(file.getAbsolutePath());
064                    lr.close();
065                    return m;
066            }
067    
068            public static final Matrix fromReader(Reader reader, Object... parameters)
069                            throws MatrixException {
070                    StringBuilder s = new StringBuilder();
071    
072                    try {
073                            IntelligentFileReader lr = new IntelligentFileReader(reader);
074                            String line = null;
075                            while ((line = lr.readLine()) != null) {
076                                    if (line.length() > 0) {
077                                            s.append(line + "\n");
078                                    }
079                            }
080                            lr.close();
081    
082                            Matrix m = MatrixFactory.zeros(ValueType.STRING, 1, 1);
083                            m.setAsString(s.toString(), 0, 0);
084    
085                            return m;
086                    } catch (Exception e) {
087                            throw new MatrixException(e);
088                    }
089            }
090    
091    }