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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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