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Java > Open Source Codes > com > lowagie > tools > arguments > FileArgument


1 /*
2  * $Id: FileArgument.java,v 1.2 2005/03/25 14:35:04 blowagie Exp $
3  * $Name: $
4  *
5  * Copyright 2005 by Bruno Lowagie.
6  *
7  * The contents of this file are subject to the Mozilla Public License Version 1.1
8  * (the "License"); you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the License.
14  *
15  * The Original Code is 'iText, a free JAVA-PDF library'.
16  *
17  * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
18  * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
19  * All Rights Reserved.
20  * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
21  * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
22  *
23  * Contributor(s): all the names of the contributors are added in the source code
24  * where applicable.
25  *
26  * Alternatively, the contents of this file may be used under the terms of the
27  * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
28  * provisions of LGPL are applicable instead of those above. If you wish to
29  * allow use of your version of this file only under the terms of the LGPL
30  * License and not to allow others to use your version of this file under
31  * the MPL, indicate your decision by deleting the provisions above and
32  * replace them with the notice and other provisions required by the LGPL.
33  * If you do not delete the provisions above, a recipient may use your version
34  * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Library General Public License as published by the Free Software Foundation;
39  * either version 2 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
43  * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
44  * details.
45  *
46  * If you didn't download this code from the following link, you should check if
47  * you aren't using an obsolete version:
48  * http://www.lowagie.com/iText/
49  */
50 package com.lowagie.tools.arguments;
51
52 import java.awt.event.ActionEvent;
53 import java.io.File;
54
55 import javax.swing.JFileChooser;
56 import javax.swing.filechooser.FileFilter;
57
58 import com.lowagie.tools.plugins.AbstractTool;
59
60 /**
61  * ToolArgument class if the argument is a java.io.File.
62  */
63 public class FileArgument extends ToolArgument {
64     /** a filter to put on the FileChooser. */
65     private FileFilter filter;
66     /** indicates if the argument has to point to a new or an existing file. */
67     private boolean newFile;
68     
69     /**
70      * Constructs a FileArgument.
71      * @param tool the tool that needs this argument
72      * @param name the name of the argument
73      * @param description the description of the argument
74      * @param newFile makes the difference between an Open or Save dialog
75      * @param filter
76      */
77     public FileArgument(AbstractTool tool, String name, String description, boolean newFile, FileFilter filter) {
78         super(tool, name, description, File.class.getName());
79         this.newFile = newFile;
80         this.filter = filter;
81     }
82     /**
83      * Constructs a FileArgument.
84      * @param tool the tool that needs this argument
85      * @param name the name of the argument
86      * @param description the description of the argument
87      * @param newFile makes the difference between an Open or Save dialog
88      */
89     public FileArgument(AbstractTool tool, String name, String description, boolean newFile) {
90         this(tool, name, description, newFile, null);
91     }
92     
93     /**
94      * Gets the argument as an object.
95      * @return an object
96      * @throws InstantiationException
97      */
98     public Object getArgument() throws InstantiationException {
99         if (value == null) return null;
100         try {
101             return new File(value);
102         } catch (Exception e) {
103             throw new InstantiationException(e.getMessage());
104         }
105     }
106     
107     /**
108      * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
109      */
110     public void actionPerformed(ActionEvent e) {
111         JFileChooser fc = new JFileChooser();
112         if (filter != null) fc.setFileFilter(filter);
113         if (newFile) {
114             fc.showSaveDialog(tool.getInternalFrame());
115         }
116         else {
117             fc.showOpenDialog(tool.getInternalFrame());
118         }
119         try {
120             setValue(fc.getSelectedFile().getAbsolutePath());
121         }
122         catch(NullPointerException npe) {
123         }
124     }
125
126 }
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