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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.tools.example.debug.gui; | ||
| 27 | |||
| 28 | import java.io.File; | ||
| 29 | import java.util.Hashtable; | ||
| 30 | import java.util.Enumeration; | ||
| 31 | import javax.swing.filechooser.*; | ||
| 32 | |||
| 33 | //### Renamed from 'ExampleFileFilter.java' provided with Swing demos. | ||
| 34 | |||
| 35 | /** | ||
| 36 | * A convenience implementation of FileFilter that filters out | ||
| 37 | * all files except for those type extensions that it knows about. | ||
| 38 | * | ||
| 39 | * Extensions are of the type ".foo", which is typically found on | ||
| 40 | * Windows and Unix boxes, but not on Macinthosh. Case is ignored. | ||
| 41 | * | ||
| 42 | * Example - create a new filter that filerts out all files | ||
| 43 | * but gif and jpg image files: | ||
| 44 | * | ||
| 45 | * JFileChooser chooser = new JFileChooser(); | ||
| 46 | * ExampleFileFilter filter = new ExampleFileFilter( | ||
| 47 | * new String{"gif", "jpg"}, "JPEG & GIF Images") | ||
| 48 | * chooser.addChoosableFileFilter(filter); | ||
| 49 | * chooser.showOpenDialog(this); | ||
| 50 | * | ||
| 51 | * @author Jeff Dinkins | ||
| 52 | */ | ||
| 53 | |||
| 54 | public class JDBFileFilter extends FileFilter { | ||
| 55 | |||
| 56 | private static String TYPE_UNKNOWN = "Type Unknown"; | ||
| 57 | private static String HIDDEN_FILE = "Hidden File"; | ||
| 58 | |||
| 59 | private Hashtable<String, JDBFileFilter> filters = null; | ||
| 60 | private String description = null; | ||
| 61 | private String fullDescription = null; | ||
| 62 | private boolean useExtensionsInDescription = true; | ||
| 63 | |||
| 64 | /** | ||
| 65 | * Creates a file filter. If no filters are added, then all | ||
| 66 | * files are accepted. | ||
| 67 | * | ||
| 68 | * @see #addExtension | ||
| 69 | */ | ||
| 70 | public JDBFileFilter() { | ||
| 71 | this.filters = new Hashtable<String, JDBFileFilter>(); | ||
| 72 | } | ||
| 73 | |||
| 74 | /** | ||
| 75 | * Creates a file filter that accepts files with the given extension. | ||
| 76 | * Example: new JDBFileFilter("jpg"); | ||
| 77 | * | ||
| 78 | * @see #addExtension | ||
| 79 | */ | ||
| 80 | public JDBFileFilter(String extension) { | ||
| 81 | this(extension,null); | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * Creates a file filter that accepts the given file type. | ||
| 86 | * Example: new JDBFileFilter("jpg", "JPEG Image Images"); | ||
| 87 | * | ||
| 88 | * Note that the "." before the extension is not needed. If | ||
| 89 | * provided, it will be ignored. | ||
| 90 | * | ||
| 91 | * @see #addExtension | ||
| 92 | */ | ||
| 93 | public JDBFileFilter(String extension, String description) { | ||
| 94 | this(); | ||
| 95 | if(extension!=null) { | ||
| 96 | addExtension(extension); | ||
| 97 | } | ||
| 98 | if(description!=null) { | ||
| 99 | setDescription(description); | ||
| 100 | } | ||
| 101 | } | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Creates a file filter from the given string array. | ||
| 105 | * Example: new JDBFileFilter(String {"gif", "jpg"}); | ||
| 106 | * | ||
| 107 | * Note that the "." before the extension is not needed adn | ||
| 108 | * will be ignored. | ||
| 109 | * | ||
| 110 | * @see #addExtension | ||
| 111 | */ | ||
| 112 | public JDBFileFilter(String[] filters) { | ||
| 113 | this(filters, null); | ||
| 114 | } | ||
| 115 | |||
| 116 | /** | ||
| 117 | * Creates a file filter from the given string array and description. | ||
| 118 | * Example: new JDBFileFilter(String {"gif", "jpg"}, "Gif and JPG Images"); | ||
| 119 | * | ||
| 120 | * Note that the "." before the extension is not needed and will be ignored. | ||
| 121 | * | ||
| 122 | * @see #addExtension | ||
| 123 | */ | ||
| 124 | public JDBFileFilter(String[] filters, String description) { | ||
| 125 | this(); | ||
| 126 | for (String filter : filters) { | ||
| 127 | // add filters one by one | ||
| 128 | addExtension(filter); | ||
| 129 | } | ||
| 130 | if(description!=null) { | ||
| 131 | setDescription(description); | ||
| 132 | } | ||
| 133 | } | ||
| 134 | |||
| 135 | /** | ||
| 136 | * Return true if this file should be shown in the directory pane, | ||
| 137 | * false if it shouldn't. | ||
| 138 | * | ||
| 139 | * Files that begin with "." are ignored. | ||
| 140 | * | ||
| 141 | * @see #getExtension | ||
| 142 | * @see FileFilter#accepts | ||
| 143 | */ | ||
| 144 | @Override | ||
| 145 | public boolean accept(File f) { | ||
| 146 | if(f != null) { | ||
| 147 | if(f.isDirectory()) { | ||
| 148 | return true; | ||
| 149 | } | ||
| 150 | String extension = getExtension(f); | ||
| 151 | if(extension != null && filters.get(getExtension(f)) != null) { | ||
| 152 | return true; | ||
| 153 | }; | ||
| 154 | } | ||
| 155 | return false; | ||
| 156 | } | ||
| 157 | |||
| 158 | /** | ||
| 159 | * Return the extension portion of the file's name . | ||
| 160 | * | ||
| 161 | * @see #getExtension | ||
| 162 | * @see FileFilter#accept | ||
| 163 | */ | ||
| 164 | public String getExtension(File f) { | ||
| 165 | if(f != null) { | ||
| 166 | String filename = f.getName(); | ||
| 167 | int i = filename.lastIndexOf('.'); | ||
| 168 | if(i>0 && i<filename.length()-1) { | ||
| 169 | return filename.substring(i+1).toLowerCase(); | ||
| 170 | }; | ||
| 171 | } | ||
| 172 | return null; | ||
| 173 | } | ||
| 174 | |||
| 175 | /** | ||
| 176 | * Adds a filetype "dot" extension to filter against. | ||
| 177 | * | ||
| 178 | * For example: the following code will create a filter that filters | ||
| 179 | * out all files except those that end in ".jpg" and ".tif": | ||
| 180 | * | ||
| 181 | * JDBFileFilter filter = new JDBFileFilter(); | ||
| 182 | * filter.addExtension("jpg"); | ||
| 183 | * filter.addExtension("tif"); | ||
| 184 | * | ||
| 185 | * Note that the "." before the extension is not needed and will be ignored. | ||
| 186 | */ | ||
| 187 | public void addExtension(String extension) { | ||
| 188 | if(filters == null) { | ||
| 189 | filters = new Hashtable<String, JDBFileFilter>(5); | ||
| 190 | } | ||
| 191 | filters.put(extension.toLowerCase(), this); | ||
| 192 | fullDescription = null; | ||
| 193 | } | ||
| 194 | |||
| 195 | |||
| 196 | /** | ||
| 197 | * Returns the human readable description of this filter. For | ||
| 198 | * example: "JPEG and GIF Image Files (*.jpg, *.gif)" | ||
| 199 | * | ||
| 200 | * @see setDescription | ||
| 201 | * @see setExtensionListInDescription | ||
| 202 | * @see isExtensionListInDescription | ||
| 203 | * @see FileFilter#getDescription | ||
| 204 | */ | ||
| 205 | @Override | ||
| 206 | public String getDescription() { | ||
| 207 | if(fullDescription == null) { | ||
| 208 | if(description == null || isExtensionListInDescription()) { | ||
| 209 | fullDescription = description==null ? "(" : description + " ("; | ||
| 210 | // build the description from the extension list | ||
| 211 | Enumeration<String> extensions = filters.keys(); | ||
| 212 | if(extensions != null) { | ||
| 213 | fullDescription += "." + extensions.nextElement(); | ||
| 214 | while (extensions.hasMoreElements()) { | ||
| 215 | fullDescription += ", " + extensions.nextElement(); | ||
| 216 | } | ||
| 217 | } | ||
| 218 | fullDescription += ")"; | ||
| 219 | } else { | ||
| 220 | fullDescription = description; | ||
| 221 | } | ||
| 222 | } | ||
| 223 | return fullDescription; | ||
| 224 | } | ||
| 225 | |||
| 226 | /** | ||
| 227 | * Sets the human readable description of this filter. For | ||
| 228 | * example: filter.setDescription("Gif and JPG Images"); | ||
| 229 | * | ||
| 230 | * @see setDescription | ||
| 231 | * @see setExtensionListInDescription | ||
| 232 | * @see isExtensionListInDescription | ||
| 233 | */ | ||
| 234 | public void setDescription(String description) { | ||
| 235 | this.description = description; | ||
| 236 | fullDescription = null; | ||
| 237 | } | ||
| 238 | |||
| 239 | /** | ||
| 240 | * Determines whether the extension list (.jpg, .gif, etc) should | ||
| 241 | * show up in the human readable description. | ||
| 242 | * | ||
| 243 | * Only relevent if a description was provided in the constructor | ||
| 244 | * or using setDescription(); | ||
| 245 | * | ||
| 246 | * @see getDescription | ||
| 247 | * @see setDescription | ||
| 248 | * @see isExtensionListInDescription | ||
| 249 | */ | ||
| 250 | public void setExtensionListInDescription(boolean b) { | ||
| 251 | useExtensionsInDescription = b; | ||
| 252 | fullDescription = null; | ||
| 253 | } | ||
| 254 | |||
| 255 | /** | ||
| 256 | * Returns whether the extension list (.jpg, .gif, etc) should | ||
| 257 | * show up in the human readable description. | ||
| 258 | * | ||
| 259 | * Only relevent if a description was provided in the constructor | ||
| 260 | * or using setDescription(); | ||
| 261 | * | ||
| 262 | * @see getDescription | ||
| 263 | * @see setDescription | ||
| 264 | * @see setExtensionListInDescription | ||
| 265 | */ | ||
| 266 | public boolean isExtensionListInDescription() { | ||
| 267 | return useExtensionsInDescription; | ||
| 268 | } | ||
| 269 | } | ||