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1
11 package org.eclipse.ui.internal.intro.impl.model.util;
12
13 import java.io.IOException  ;
14 import java.io.InputStream ;
15 import java.net.URL ;
16 import java.util.ArrayList ;
17 import java.util.Map ;
18 import org.eclipse.core.runtime.IPath;
19 import org.eclipse.core.runtime.Path;
20 import org.eclipse.core.runtime.Platform;
21 import org.osgi.framework.Bundle;
22
23 public class FindSupport {
26 private static String [] NL_JAR_VARIANTS = buildNLVariants(Platform.getNL());
27
28 private static String [] buildNLVariants(String nl) {
29 ArrayList result = new ArrayList ();
30 IPath base = new Path("nl");
32 IPath path = new Path(nl.replace('_', '/'));
33 while (path.segmentCount() > 0) {
34 result.add(base.append(path).toString());
35 if (path.segmentCount() > 1)
37 result.add(base.append(path.toString().replace('/', '_')).toString());
38 path = path.removeLastSegments(1);
39 }
40
41 return (String []) result.toArray(new String [result.size()]);
42 }
43
44
47 public static URL find(Bundle bundle, IPath path) {
48 return find(bundle, path, null);
49 }
50
51
62 public static URL [] findEntries(Bundle bundle, IPath path) {
63 return findEntries(bundle, path, null);
64 }
65
66
78 public static URL [] findEntries(Bundle bundle, IPath path, Map override) {
79 ArrayList results = new ArrayList (1);
80 find(bundle, path, override, results);
81 return (URL []) results.toArray(new URL [results.size()]);
82 }
83
84
87 public static URL find(Bundle b, IPath path, Map override) {
88 return find(b, path, override, null);
89 }
90
91 private static URL find(Bundle b, IPath path, Map override, ArrayList multiple) {
92 if (path == null)
93 return null;
94
95 URL result = null;
96
97 if (path.isEmpty() || path.isRoot()) {
99 result = findInPlugin(b, Path.EMPTY, multiple);
103 if (result == null || multiple != null)
104 result = findInFragments(b, Path.EMPTY, multiple);
105 return result;
106 }
107
108 String first = path.segment(0);
110 if (first.charAt(0) != '$') {
111 result = findInPlugin(b, path, multiple);
112 if (result == null || multiple != null)
113 result = findInFragments(b, path, multiple);
114 return result;
115 }
116
117 IPath rest = path.removeFirstSegments(1);
119 if (first.equalsIgnoreCase("$nl$")) return findNL(b, rest, override, multiple);
121 if (first.equalsIgnoreCase("$os$")) return findOS(b, rest, override, multiple);
123 if (first.equalsIgnoreCase("$ws$")) return findWS(b, rest, override, multiple);
125 if (first.equalsIgnoreCase("$files$")) return null;
127
128 return null;
129 }
130
131 private static URL findOS(Bundle b, IPath path, Map override, ArrayList multiple) {
132 String os = null;
133 if (override != null)
134 try {
135 os = (String ) override.get("$os$"); } catch (ClassCastException e) {
138 }
140 if (os == null)
141 os = Platform.getOS();
143 if (os.length() == 0)
144 return null;
145
146 String osArch = null;
148 if (override != null)
149 try {
150 osArch = (String ) override.get("$arch$"); } catch (ClassCastException e) {
153 }
155 if (osArch == null)
156 osArch = Platform.getOSArch();
158 if (osArch.length() == 0)
159 return null;
160
161 URL result = null;
162 IPath base = new Path("os").append(os).append(osArch); while (base.segmentCount() != 1) {
165 IPath filePath = base.append(path);
166 result = findInPlugin(b, filePath, multiple);
167 if (result != null && multiple == null)
168 return result;
169 result = findInFragments(b, filePath, multiple);
170 if (result != null && multiple == null)
171 return result;
172 base = base.removeLastSegments(1);
173 }
174 result = findInPlugin(b, path, multiple);
177 if (result != null && multiple == null)
178 return result;
179 return findInFragments(b, path, multiple);
180 }
181
182 private static URL findWS(Bundle b, IPath path, Map override, ArrayList multiple) {
183 String ws = null;
184 if (override != null)
185 try {
186 ws = (String ) override.get("$ws$"); } catch (ClassCastException e) {
189 }
191 if (ws == null)
192 ws = Platform.getWS();
194 IPath filePath = new Path("ws").append(ws).append(path); URL result = findInPlugin(b, filePath, multiple);
198 if (result != null && multiple == null)
199 return result;
200 result = findInFragments(b, filePath, multiple);
201 if (result != null && multiple == null)
202 return result;
203 result = findInPlugin(b, path, multiple);
206 if (result != null && multiple == null)
207 return result;
208 return findInFragments(b, path, multiple);
209 }
210
211 private static URL findNL(Bundle b, IPath path, Map override, ArrayList multiple) {
212 String nl = null;
213 String [] nlVariants = null;
214 if (override != null)
215 try {
216 nl = (String ) override.get("$nl$"); } catch (ClassCastException e) {
219 }
221 nlVariants = nl == null ? NL_JAR_VARIANTS : buildNLVariants(nl);
222 if (nl != null && nl.length() == 0)
223 return null;
224
225 URL result = null;
226 for (int i = 0; i < nlVariants.length; i++) {
227 IPath filePath = new Path(nlVariants[i]).append(path);
228 result = findInPlugin(b, filePath, multiple);
229 if (result != null && multiple == null)
230 return result;
231 result = findInFragments(b, filePath, multiple);
232 if (result != null && multiple == null)
233 return result;
234 }
235 result = findInPlugin(b, path, multiple);
238 if (result != null && multiple == null)
239 return result;
240 return findInFragments(b, path, multiple);
241 }
242
243 private static URL findInPlugin(Bundle b, IPath filePath, ArrayList multiple) {
244 URL result = b.getEntry(filePath.toString());
245 if (result != null && multiple != null)
246 multiple.add(result);
247 return result;
248 }
249
250 private static URL findInFragments(Bundle b, IPath filePath, ArrayList multiple) {
251 Bundle[] fragments = Platform.getFragments(b);
252 if (fragments == null)
253 return null;
254
255 multiple.ensureCapacity(fragments.length + 1);
256 URL fileURL = null;
257 int i = 0;
258 while (i < fragments.length && fileURL == null) {
259 fileURL = fragments[i].getEntry(filePath.toString());
260 if (fileURL != null && multiple != null) {
261 multiple.add(fileURL);
262 fileURL = null;
263 }
264 i++;
265 }
266 return fileURL;
267 }
268
269
272 public static final InputStream openStream(Bundle bundle, IPath file, boolean localized) throws IOException {
273 URL url = null;
274 if (!localized) {
275 url = findInPlugin(bundle, file, null);
276 if (url == null)
277 url = findInFragments(bundle, file, null);
278 } else {
279 url = FindSupport.find(bundle, file);
280 }
281 if (url != null)
282 return url.openStream();
283 throw new IOException ("Cannot find " + file.toString()); }
285
286 }
287 |
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