01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: *
29: * This software is Open Source Initiative approved Open Source Software.
30: * Open Source Initative Approved is a trademark of the Open Source Initiative.
31: *
32: * This file is part of DrJava. Download the current version of this project
33: * from http://www.drjava.org/ or http://sourceforge.net/projects/drjava/
34: *
35: * END_COPYRIGHT_BLOCK*/
36:
37: package edu.rice.cs.drjava.ui;
38:
39: import java.io.File;
40: import javax.swing.filechooser.FileFilter;
41: import edu.rice.cs.drjava.DrJava;
42: import edu.rice.cs.drjava.DrJavaRoot;
43: import edu.rice.cs.drjava.config.OptionConstants;
44:
45: /** A file filter for files with extensions ".java" and ".gj". Used in the file choosers for open and save.
46: * @version $Id: JavaSourceFilter.java 4255 2007-08-28 19:17:37Z mgricken $
47: */
48: public class JavaSourceFilter extends FileFilter {
49:
50: /** Returns true if the file's extension matches Java or GJ. */
51: public boolean accept(File f) {
52: if (f.isDirectory()) {
53: return true;
54: }
55: String extension = getExtension(f);
56: if (extension != null) {
57: switch (DrJava.getConfig().getSetting(
58: OptionConstants.LANGUAGE_LEVEL)) {
59: case (DrJavaRoot.FULL_JAVA):
60: return (extension.equals("java") || extension
61: .equals("j"));
62: case (DrJavaRoot.ELEMENTARY_LEVEL):
63: return extension.equals("dj0");
64: case (DrJavaRoot.INTERMEDIATE_LEVEL):
65: return extension.equals("dj1");
66: case (DrJavaRoot.ADVANCED_LEVEL):
67: return extension.equals("dj2");
68: }
69: }
70: return false;
71: }
72:
73: /** @return A description of this filter to display. */
74: public String getDescription() {
75: switch (DrJava.getConfig().getSetting(
76: OptionConstants.LANGUAGE_LEVEL)) {
77: case (DrJavaRoot.FULL_JAVA):
78: return "Java source files";
79: case (DrJavaRoot.ELEMENTARY_LEVEL):
80: return "Elementary source files (.dj0)";
81: case (DrJavaRoot.INTERMEDIATE_LEVEL):
82: return "Intermediate source files (.dj1)";
83: case (DrJavaRoot.ADVANCED_LEVEL):
84: return "Advanced source files (.dj2)";
85: }
86: return "Java source files";
87: }
88:
89: /* Get the extension of a file. */
90: public static String getExtension(File f) {
91: String ext = null;
92: String s = f.getName();
93: int i = s.lastIndexOf('.');
94: if (i > 0 && i < s.length() - 1) {
95: ext = s.substring(i + 1).toLowerCase();
96: }
97: return ext;
98: }
99: }
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