|
1
11 package org.eclipse.pde.internal.build.tasks;
12
13 import java.io.*;
14 import java.util.*;
15 import org.apache.tools.ant.BuildException;
16 import org.apache.tools.ant.Task;
17
18
23 public class IdReplaceTask extends Task {
24 private static final String  UTF_8 = "UTF-8"; private static final String FEATURE_START_TAG = "<feature"; private static final String ID = "id"; private static final String VERSION = "version"; private static final String COMMA = ","; private static final String BACKSLASH = "\""; private static final String EMPTY = ""; private static final String PLUGIN_START_TAG = "<plugin"; private static final String INCLUDES_START_TAG = "<includes"; private static final String COMMENT_START_TAG = "<!--"; private static final String COMMENT_END_TAG = "-->";
36 private String featureFilePath;
38 private Map pluginIds = new HashMap(10);
42 private Map featureIds = new HashMap(4);
46 private String selfVersion;
48
49 private boolean contentChanged = false;
50
51 private final static String GENERIC_VERSION_NUMBER = "0.0.0"; private final static String QUALIFIER = "qualifier";
54
58 public void setFeatureFilePath(String path) {
59 featureFilePath = path;
60 }
61
62
66 public void setSelfVersion(String version) {
67 selfVersion = version;
68 }
69
70
77 public void setPluginIds(String values) {
78 pluginIds = new HashMap(10);
79 for (StringTokenizer tokens = new StringTokenizer(values, COMMA); tokens.hasMoreTokens();) {
80 String token = tokens.nextToken().trim();
81 String id = EMPTY;
82 if (!token.equals(EMPTY))
83 id = token;
84
85 String version = EMPTY;
86 token = tokens.nextToken().trim();
87 if (!token.equals(EMPTY))
88 version = token;
89 pluginIds.put(id, version);
90 }
91 }
92
93
99 public void setFeatureIds(String values) {
100 featureIds = new HashMap(10);
101 for (StringTokenizer tokens = new StringTokenizer(values, COMMA); tokens.hasMoreTokens();) {
102 String token = tokens.nextToken().trim();
103 String id = EMPTY;
104 if (!token.equals(EMPTY))
105 id = token;
106
107 String version = EMPTY;
108 token = tokens.nextToken().trim();
109 if (!token.equals(EMPTY))
110 version = token;
111 featureIds.put(id, version);
112 }
113 }
114
115 public void execute() {
116 StringBuffer buffer = null;
117 try {
118 buffer = readFile(new File(featureFilePath));
119 } catch (IOException e) {
120 throw new BuildException(e);
121 }
122
123 int startComment = scan(buffer, 0, COMMENT_START_TAG);
125 int endComment = startComment > -1 ? scan(buffer, startComment, COMMENT_END_TAG) : -1;
126 int startFeature = scan(buffer, 0, FEATURE_START_TAG);
127
128 while (startComment != -1 && startFeature > startComment && startFeature < endComment) {
129 startFeature = scan(buffer, endComment, FEATURE_START_TAG);
130 startComment = scan(buffer, endComment, COMMENT_START_TAG);
131 endComment = startComment > -1 ? scan(buffer, startComment, COMMENT_END_TAG) : -1;
132 }
133
134 if (startFeature == -1)
135 return;
136
137 int endFeature = scan(buffer, startFeature, ">");
139 if (selfVersion != null) {
140 boolean versionFound = false;
141 while (!versionFound) {
142 int startVersionWord = scan(buffer, startFeature, VERSION);
143 if (startVersionWord == -1 || startVersionWord > endFeature)
144 return;
145 if (!Character.isWhitespace(buffer.charAt(startVersionWord - 1))) {
146 startFeature = startVersionWord + VERSION.length();
147 continue;
148 }
149 int endVersionWord = startVersionWord + VERSION.length();
151 while (Character.isWhitespace(buffer.charAt(endVersionWord)) && endVersionWord < endFeature) {
152 endVersionWord++;
153 }
154 if (endVersionWord > endFeature) { System.err.println("Could not find the tag 'version' in the feature header, file: " + featureFilePath); return;
157 }
158
159 if (buffer.charAt(endVersionWord) != '=') {
160 startFeature = endVersionWord;
161 continue;
162 }
163
164 int startVersionId = scan(buffer, startVersionWord + 1, BACKSLASH);
165 int endVersionId = scan(buffer, startVersionId + 1, BACKSLASH);
166 buffer.replace(startVersionId + 1, endVersionId, selfVersion);
167 endFeature = endFeature + (selfVersion.length() - (endVersionId - startVersionId));
168 contentChanged = true;
169 versionFound = true;
170 }
171 }
172
173 int startElement = endFeature;
174 int startId = 0;
175 while (true) {
176 int startPlugin = scan(buffer, startElement + 1, PLUGIN_START_TAG);
177 int startInclude = scan(buffer, startElement + 1, INCLUDES_START_TAG);
178
179 if (startPlugin == -1 && startInclude == -1)
180 break;
181
182 startComment = scan(buffer, startElement + 1, COMMENT_START_TAG);
183 endComment = startComment > -1 ? scan(buffer, startComment, COMMENT_END_TAG) : -1;
184
185 int foundElement = -1;
186 boolean isPlugin = false;
187
188 if (startPlugin == -1 || startInclude == -1) {
190 foundElement = startPlugin != -1 ? startPlugin : startInclude;
191 isPlugin = (startPlugin != -1 ? true : false);
192 } else {
193 if (startPlugin < startInclude) {
194 foundElement = startPlugin;
195 isPlugin = true;
196 } else {
197 foundElement = startInclude;
198 isPlugin = false;
199 }
200 }
201
202 if (startComment != -1 && foundElement > startComment && foundElement < endComment) {
203 startElement = endComment;
204 continue;
205 }
206
207 int startElementId, endElementId;
208 int startVersionWord, startVersionId, endVersionId;
209
210 startId = scan(buffer, foundElement, ID);
211 startVersionWord = scan(buffer, foundElement, VERSION);
212 if (startId < startVersionWord) {
214 startElementId = scan(buffer, startId + 1, BACKSLASH);
215 endElementId = scan(buffer, startElementId + 1, BACKSLASH);
216
217 startVersionWord = scan(buffer, endElementId + 1, VERSION);
219 startVersionId = scan(buffer, startVersionWord + 1, BACKSLASH);
220 endVersionId = scan(buffer, startVersionId + 1, BACKSLASH);
221 } else {
222 startVersionId = scan(buffer, startVersionWord + 1, BACKSLASH);
223 endVersionId = scan(buffer, startVersionId + 1, BACKSLASH);
224
225 startId = scan(buffer, endVersionId + 1, ID);
227 startElementId = scan(buffer, startId + 1, BACKSLASH);
228 endElementId = scan(buffer, startElementId + 1, BACKSLASH);
229 }
230
231 if (startId == -1 || startVersionWord == -1)
232 break;
233
234 char[] elementId = new char[endElementId - startElementId - 1];
235 buffer.getChars(startElementId + 1, endElementId, elementId, 0);
236
237 char[] versionId = new char[endVersionId - startVersionId - 1];
238 buffer.getChars(startVersionId + 1, endVersionId, versionId, 0);
239
240 if (!new String (versionId).equals(GENERIC_VERSION_NUMBER) && !new String (versionId).endsWith(QUALIFIER)) {
241 startElement = startVersionId;
242 continue;
243 }
244
245 startVersionId++;
246 String replacementVersion = null;
247 Version v = new Version(new String (versionId));
248 String lookupKey = new String (elementId) + ':' + v.getMajor() + '.' + v.getMinor() + '.' + v.getMicro();
249 if (isPlugin) {
250 replacementVersion = (String ) pluginIds.get(lookupKey);
251 } else {
252 replacementVersion = (String ) featureIds.get(lookupKey);
253 }
254 int change = 0;
255 if (replacementVersion == null) {
256 System.err.println("Could not find " + new String (elementId)); } else {
258 buffer.replace(startVersionId, endVersionId, replacementVersion);
259 contentChanged = true;
260 change = endVersionId - startVersionId - replacementVersion.length();
261 }
262 startElement = (endElementId > endVersionId) ? endElementId - change: endVersionId - change;
263 }
264
265 if (!contentChanged)
266 return;
267
268 try {
269 OutputStreamWriter w = new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream(featureFilePath)), UTF_8);
270 w.write(buffer.toString());
271 w.close();
272 } catch (FileNotFoundException e) {
273 } catch (IOException e) {
275 throw new BuildException(e);
276 }
277 }
278
279 private int scan(StringBuffer buf, int start, String targetName) {
280 return scan(buf, start, new String [] {targetName});
281 }
282
283 private int scan(StringBuffer buf, int start, String [] targets) {
284 for (int i = start; i < buf.length(); i++) {
285 for (int j = 0; j < targets.length; j++) {
286 if (i < buf.length() - targets[j].length()) {
287 String match = buf.substring(i, i + targets[j].length());
288 if (targets[j].equalsIgnoreCase(match))
289 return i;
290 }
291 }
292 }
293 return -1;
294 }
295
296 private StringBuffer readFile(File targetName) throws IOException {
297 InputStreamReader reader = new InputStreamReader(new BufferedInputStream(new FileInputStream(targetName)), UTF_8);
298 StringBuffer result = new StringBuffer ();
299 char[] buf = new char[4096];
300 int count;
301 try {
302 count = reader.read(buf, 0, buf.length);
303 while (count != -1) {
304 result.append(buf, 0, count);
305 count = reader.read(buf, 0, buf.length);
306 }
307 } finally {
308 try {
309 reader.close();
310 } catch (IOException e) {
311 }
313 }
314 return result;
315 }
316 }
317 |
Popular Tags |
Java API By Example, From Geeks To Geeks.