1 /*
2 * Copyright (c) 2003 Scott Howlett & Paul Libbrecht.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. The end-user documentation included with the redistribution,
18 * if any, must include the following acknowledgment:
19 * "This product includes software developed by the Xwing
20 * Project ( http://xwing.sourceforge.net/ )."
21 * Alternately, this acknowledgment may appear in the software itself,
22 * if and wherever such third-party acknowledgments normally appear.
23 *
24 * 4. The name "Xwing" must not be used to endorse or promote products
25 * derived from this software without prior written permission. For
26 * written permission, please contact the project authors via
27 * the Xwing project site, http://xwing.sourceforge.net/ .
28 *
29 * 5. Products derived from this software may not be called "Xwing",
30 * nor may "Xwing" appear in their name, without prior written
31 * permission of the Xwing project.
32 *
33 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
34 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36 * DISCLAIMED. IN NO EVENT SHALL THE XWING AUTHORS OR THE PROJECT
37 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
40 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
41 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
42 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
43 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 * SUCH DAMAGE.
45 *
46 * For more information on Xwing, please see
47 * < http://xwing.sourceforge.net/ >.
48 */
49
50 package net.sourceforge.xwing.jelly.tags.util;
51
52 import java.io.File;
53
54 import javax.swing.filechooser.FileFilter;
55
56 import org.apache.commons.jelly.JellyTagException;
57 import org.apache.commons.jelly.MissingAttributeException;
58 import org.apache.commons.jelly.TagSupport;
59 import org.apache.commons.jelly.XMLOutput;
60 import org.apache.commons.lang.StringUtils;
61
62 public class ExtensionFilterTag extends TagSupport {
63
64 private String var;
65 private String description;
66 private String extensions;
67
68 public void doTag(XMLOutput arg) throws JellyTagException {
69 File theFile = null;
70
71 if (var == null) {
72 throw new MissingAttributeException("var");
73 }
74
75 if (description == null) {
76 throw new MissingAttributeException("description");
77 }
78
79 if (extensions == null) {
80 throw new MissingAttributeException("extensions");
81 }
82
83 String[] ext = StringUtils.split(extensions, ",");
84 for (int i = 0; i < ext.length; ++i) {
85 ext[i] = ext[i].trim();
86
87 while (ext[i].startsWith(".")) {
88 ext[i] = ext[i].substring(1);
89 }
90 }
91 context.setVariable(var, new ExtensionFilter(description, ext));
92 }
93
94 public void setVar(String var) {
95 this.var = var;
96 }
97
98 public void setDescription(String string) {
99 description = string;
100 }
101
102 public void setExtensions(String string) {
103 extensions = string;
104 }
105
106 }
107
108 class ExtensionFilter extends FileFilter {
109
110 private String description;
111 private String[] extensions;
112
113 public ExtensionFilter(String description, String[] extensions) {
114 this.description = description;
115 this.extensions = extensions;
116 }
117
118 public boolean accept(File pathname) {
119
120 if (pathname.isDirectory()) {
121 return true;
122 }
123
124 String ext = getExtension(pathname);
125 for (int i = 0; i < extensions.length; ++i) {
126 if (extensions[i].equalsIgnoreCase(ext)) {
127 return true;
128 }
129 }
130 return false;
131 }
132
133 public String getDescription() {
134 return description;
135 }
136
137 public static String getExtension(File f) {
138 String ext = null;
139 String s = f.getName();
140 int i = s.lastIndexOf('.');
141
142 if (i > 0 && i < s.length() - 1) {
143 ext = s.substring(i + 1);
144 }
145 return ext;
146 }
147
148 }
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