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.gui.actions;
025    
026    import java.awt.event.KeyEvent;
027    import java.io.File;
028    
029    import javax.swing.Action;
030    import javax.swing.JComponent;
031    import javax.swing.JFileChooser;
032    import javax.swing.filechooser.FileFilter;
033    
034    import org.ujmp.core.Matrix;
035    import org.ujmp.core.MatrixFactory;
036    import org.ujmp.core.enums.FileFormat;
037    import org.ujmp.core.interfaces.GUIObject;
038    
039    public class ImportMatrixFromFileAction extends ObjectAction {
040            private static final long serialVersionUID = 8110915004887885053L;
041    
042            public ImportMatrixFromFileAction(JComponent c, GUIObject m) {
043                    super(c, m);
044                    putValue(Action.NAME, "from File...");
045                    putValue(Action.SHORT_DESCRIPTION,
046                                    "import a matrix from a location on disk");
047                    putValue(Action.MNEMONIC_KEY, KeyEvent.VK_F);
048            }
049    
050            
051            public Object call() {
052                    try {
053                            File file = null;
054                            FileFormat fileFormat = null;
055                            JFileChooser chooser = new JFileChooser();
056    
057                            for (FileFormat f : FileFormat.values()) {
058                                    chooser.addChoosableFileFilter(f.getFileFilter());
059                            }
060    
061                            chooser.setFileFilter(FileFormat.CSV.getFileFilter());
062                            chooser.setAcceptAllFileFilterUsed(false);
063                            chooser.setDialogTitle("Import");
064    
065                            int returnVal = chooser.showOpenDialog(null);
066                            if (returnVal == JFileChooser.APPROVE_OPTION) {
067                                    file = chooser.getSelectedFile();
068                                    FileFilter filter = chooser.getFileFilter();
069                                    for (FileFormat f : FileFormat.values()) {
070                                            if (filter.equals(f.getFileFilter())) {
071                                                    fileFormat = f;
072                                            }
073                                    }
074    
075                            }
076    
077                            if (file == null)
078                                    return null;
079    
080                            Matrix m = MatrixFactory.importFromFile(fileFormat, file);
081                            m.showGUI();
082                            return m;
083                    } catch (Exception e) {
084                            e.printStackTrace();
085                            return null;
086                    }
087            }
088    }