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12 package org.eclipse.core.internal.preferences;
13
14 import java.io.*;
15 import java.lang.ref.WeakReference  ;
16 import java.net.URL ;
17 import java.util.*;
18 import org.eclipse.core.internal.preferences.exchange.IProductPreferencesService;
19 import org.eclipse.core.internal.runtime.RuntimeLog;
20 import org.eclipse.core.runtime.*;
21 import org.eclipse.core.runtime.preferences.*;
22 import org.eclipse.osgi.util.NLS;
23 import org.osgi.framework.Bundle;
24 import org.osgi.framework.BundleContext;
25 import org.osgi.util.tracker.ServiceTracker;
26
27
30 public class DefaultPreferences extends EclipsePreferences {
31 private static Set loadedNodes = new HashSet();
33 private static final String KEY_PREFIX = "%"; private static final String KEY_DOUBLE_PREFIX = "%%"; private static final IPath NL_DIR = new Path("$nl$");
37 private static final String PROPERTIES_FILE_EXTENSION = "properties"; private static Properties productCustomization;
39 private static Properties productTranslation;
40 private static Properties commandLineCustomization;
41 private EclipsePreferences loadLevel;
42
43 private String qualifier;
45 private int segmentCount;
46 private WeakReference pluginReference;
47
48 public static String pluginCustomizationFile = null;
49
50
53 public DefaultPreferences() {
54 this(null, null);
55 }
56
57 private DefaultPreferences(EclipsePreferences parent, String name, Object context) {
58 this(parent, name);
59 this.pluginReference = new WeakReference (context);
60 }
61
62 private DefaultPreferences(EclipsePreferences parent, String name) {
63 super(parent, name);
64
65 if (parent instanceof DefaultPreferences)
66 this.pluginReference = ((DefaultPreferences) parent).pluginReference;
67
68 String path = absolutePath();
70 segmentCount = getSegmentCount(path);
71 if (segmentCount < 2)
72 return;
73
74 qualifier = getSegment(path, 1);
76 }
77
78
84 private void applyBundleDefaults() {
85 Bundle bundle = PreferencesOSGiUtils.getDefault().getBundle(name());
86 if (bundle == null)
87 return;
88 URL url = FileLocator.find(bundle, new Path(IPreferencesConstants.PREFERENCES_DEFAULT_OVERRIDE_FILE_NAME), null);
89 if (url == null) {
90 if (EclipsePreferences.DEBUG_PREFERENCE_GENERAL)
91 PrefsMessages.message("Preference default override file not found for bundle: " + bundle.getSymbolicName()); return;
93 }
94 URL transURL = FileLocator.find(bundle, NL_DIR.append(IPreferencesConstants.PREFERENCES_DEFAULT_OVERRIDE_BASE_NAME).addFileExtension(PROPERTIES_FILE_EXTENSION), null);
95 if (transURL == null && EclipsePreferences.DEBUG_PREFERENCE_GENERAL)
96 PrefsMessages.message("Preference translation file not found for bundle: " + bundle.getSymbolicName()); applyDefaults(name(), loadProperties(url), loadProperties(transURL));
98 }
99
100
104 private void applyCommandLineDefaults() {
105 if (commandLineCustomization == null) {
107 String filename = pluginCustomizationFile;
108 if (filename == null) {
109 if (EclipsePreferences.DEBUG_PREFERENCE_GENERAL)
110 PrefsMessages.message("Command-line preferences customization file not specified."); return;
112 }
113 if (EclipsePreferences.DEBUG_PREFERENCE_GENERAL)
114 PrefsMessages.message("Using command-line preference customization file: " + filename); commandLineCustomization = loadProperties(filename);
116 }
117 applyDefaults(null, commandLineCustomization, null);
118 }
119
120
126 private void applyDefaults(String id, Properties defaultValues, Properties translations) {
127 for (Enumeration e = defaultValues.keys(); e.hasMoreElements();) {
128 String fullKey = (String ) e.nextElement();
129 String value = defaultValues.getProperty(fullKey);
130 if (value == null)
131 continue;
132 IPath childPath = new Path(fullKey);
133 String key = childPath.lastSegment();
134 childPath = childPath.removeLastSegments(1);
135 String localQualifier = id;
136 if (id == null) {
137 localQualifier = childPath.segment(0);
138 childPath = childPath.removeFirstSegments(1);
139 }
140 if (name().equals(localQualifier)) {
141 value = translatePreference(value, translations);
142 if (EclipsePreferences.DEBUG_PREFERENCE_SET)
143 PrefsMessages.message("Setting default preference: " + (new Path(absolutePath()).append(childPath).append(key)) + '=' + value); ((EclipsePreferences) internalNode(childPath.toString(), false, null)).internalPut(key, value);
145 }
146 }
147 }
148
149 public IEclipsePreferences node(String childName, Object context) {
150 return internalNode(childName, true, context);
151 }
152
153
162 private void applyRuntimeDefaults() {
163 WeakReference ref = PreferencesService.getDefault().applyRuntimeDefaults(name(), pluginReference);
164 if (ref != null)
165 pluginReference = ref;
166 }
167
168
175 private void applyProductDefaults() {
176 if (productCustomization == null) {
178 BundleContext context = Activator.getContext();
179 if (context != null) {
180 ServiceTracker productTracker = new ServiceTracker(context, IProductPreferencesService.class.getName(), null);
181 productTracker.open();
182 IProductPreferencesService productSpecials = (IProductPreferencesService) productTracker.getService();
183 if (productSpecials != null) {
184 productCustomization = productSpecials.getProductCustomization();
185 productTranslation = productSpecials.getProductTranslation();
186 }
187 productTracker.close();
188 } else {
189 PrefsMessages.message("Product-specified preferences called before plugin is started"); }
191 if (productCustomization == null)
192 productCustomization = new Properties();
193 }
194 if (!productCustomization.isEmpty())
195 applyDefaults(null, productCustomization, productTranslation);
196 }
197
198
201 public void flush() {
202 }
204
205 protected IEclipsePreferences getLoadLevel() {
206 if (loadLevel == null) {
207 if (qualifier == null)
208 return null;
209 EclipsePreferences node = this;
213 for (int i = 2; i < segmentCount; i++)
214 node = (EclipsePreferences) node.parent();
215 loadLevel = node;
216 }
217 return loadLevel;
218 }
219
220 protected EclipsePreferences internalCreate(EclipsePreferences nodeParent, String nodeName, Object context) {
221 return new DefaultPreferences(nodeParent, nodeName, context);
222 }
223
224 protected boolean isAlreadyLoaded(IEclipsePreferences node) {
225 return loadedNodes.contains(node.name());
226 }
227
228
231 protected void load() {
232 loadDefaults();
233 }
234
235 private void loadDefaults() {
236 applyRuntimeDefaults();
237 applyBundleDefaults();
238 applyProductDefaults();
239 applyCommandLineDefaults();
240 }
241
242 private Properties loadProperties(URL url) {
243 Properties result = new Properties();
244 if (url == null)
245 return result;
246 InputStream input = null;
247 try {
248 input = url.openStream();
249 result.load(input);
250 } catch (IOException e) {
251 if (EclipsePreferences.DEBUG_PREFERENCE_GENERAL) {
252 PrefsMessages.message("Problem opening stream to preference customization file: " + url); e.printStackTrace();
254 }
255 } finally {
256 if (input != null)
257 try {
258 input.close();
259 } catch (IOException e) {
260 }
262 }
263 return result;
264 }
265
266 private Properties loadProperties(String filename) {
267 Properties result = new Properties();
268 InputStream input = null;
269 try {
270 input = new BufferedInputStream(new FileInputStream(filename));
271 result.load(input);
272 } catch (FileNotFoundException e) {
273 if (EclipsePreferences.DEBUG_PREFERENCE_GENERAL)
274 PrefsMessages.message("Preference customization file not found: " + filename); } catch (IOException e) {
276 String message = NLS.bind(PrefsMessages.preferences_loadException, filename);
277 IStatus status = new Status(IStatus.ERROR, PrefsMessages.OWNER_NAME, IStatus.ERROR, message, e);
278 RuntimeLog.log(status);
279 } finally {
280 if (input != null)
281 try {
282 input.close();
283 } catch (IOException e) {
284 }
286 }
287 return result;
288 }
289
290 protected void loaded() {
291 loadedNodes.add(name());
292 }
293
294
297 public void sync() {
298 }
300
301
305 private String translatePreference(String value, Properties props) {
306 value = value.trim();
307 if (props == null || value.startsWith(KEY_DOUBLE_PREFIX))
308 return value;
309 if (value.startsWith(KEY_PREFIX)) {
310 int ix = value.indexOf(" "); String key = ix == -1 ? value.substring(1) : value.substring(1, ix);
312 String dflt = ix == -1 ? value : value.substring(ix + 1);
313 return props.getProperty(key, dflt);
314 }
315 return value;
316 }
317 }
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