|
1
11 package org.eclipse.pde.internal.core;
12
13 import java.io.BufferedInputStream  ;
14 import java.io.File ;
15 import java.io.FileInputStream ;
16 import java.io.IOException ;
17 import java.io.InputStream ;
18 import java.net.URL ;
19 import java.util.ArrayList ;
20 import java.util.Collection ;
21 import java.util.HashMap ;
22 import java.util.Iterator ;
23 import java.util.Map ;
24 import java.util.StringTokenizer ;
25 import java.util.Vector ;
26
27 import org.eclipse.core.runtime.IProgressMonitor;
28 import org.eclipse.core.runtime.NullProgressMonitor;
29 import org.eclipse.core.runtime.Preferences;
30 import org.eclipse.core.runtime.Preferences.PropertyChangeEvent;
31 import org.eclipse.pde.core.IModelProviderEvent;
32 import org.eclipse.pde.core.IModelProviderListener;
33 import org.eclipse.pde.internal.core.feature.ExternalFeatureModel;
34 import org.eclipse.pde.internal.core.ifeature.IFeature;
35 import org.eclipse.pde.internal.core.ifeature.IFeatureModel;
36
37 public class ExternalFeatureModelManager implements
38 Preferences.IPropertyChangeListener {
39
40
45 private static IFeatureModel createModel(File manifest) {
46 ExternalFeatureModel model = new ExternalFeatureModel();
47 model.setInstallLocation(manifest.getParent());
48 InputStream stream = null;
49 try {
50 stream = new BufferedInputStream (new FileInputStream (manifest));
51 model.load(stream, false);
52 return model;
53 } catch (Exception e) {
54 } finally {
55 if (stream != null) {
56 try {
57 stream.close();
58 } catch (IOException e) {
59 }
60 }
61 }
62 return null;
63 }
64
65 private static IFeatureModel[] createModels(URL [] featurePaths, IProgressMonitor monitor) {
66 if (monitor == null)
67 monitor = new NullProgressMonitor();
68 monitor.beginTask("", featurePaths.length); Map uniqueFeatures = new HashMap ();
70 for (int i = 0; i < featurePaths.length; i++) {
71 File manifest = new File (featurePaths[i].getFile(), "feature.xml"); if (!manifest.exists() || !manifest.isFile()) {
73 monitor.worked(1);
74 continue;
75 }
76 IFeatureModel model = createModel(manifest);
77 if (model != null && model.isLoaded()) {
78 IFeature feature = model.getFeature();
79 uniqueFeatures.put(
80 feature.getId() + "_" + feature.getVersion(), model); }
82 monitor.worked(1);
83 }
84 Collection models = uniqueFeatures.values();
85 return (IFeatureModel[]) models.toArray(new IFeatureModel[models.size()]);
86 }
87
88 private Vector fListeners = new Vector ();
89
90 private IFeatureModel[] fModels;
91
92 private String fPlatformHome;
93
94 private Preferences fPref;
95
96 public ExternalFeatureModelManager() {
97 fPref = PDECore.getDefault().getPluginPreferences();
98 }
99
100 public void addModelProviderListener(IModelProviderListener listener) {
101 fListeners.add(listener);
102 }
103
104 private boolean equalPaths(String path1, String path2) {
105 if (path1 == null) {
106 if (path2 == null) {
107 return true;
108 }
109 return false;
110 }
111 if (path2 == null) {
112 return false;
113 }
114 return new File (path1).equals(new File (path2));
115
116 }
117
118 private void fireModelProviderEvent(IModelProviderEvent e) {
119 for (Iterator iter = fListeners.iterator(); iter.hasNext();) {
120 IModelProviderListener listener = (IModelProviderListener) iter
121 .next();
122 listener.modelsChanged(e);
123 }
124 }
125
126
130 private String getPathString(Object propertyValue) {
131 if (propertyValue != null && propertyValue instanceof String ) {
132 String path = (String ) propertyValue;
133 if (path.length() > 0) {
134 return path;
135 }
136 }
137 return null;
138 }
139
140 public static IFeatureModel[] createModels(String platformHome, ArrayList additionalLocations, IProgressMonitor monitor) {
141 if (platformHome != null && platformHome.length() > 0) {
142 URL [] featureURLs = PluginPathFinder.getFeaturePaths(platformHome);
143
144 if (additionalLocations.size() == 0)
145 return createModels(featureURLs, monitor);
146
147 File [] dirs = new File [additionalLocations.size()];
148 for (int i = 0; i < dirs.length; i++) {
149 String directory = additionalLocations.get(i).toString();
150 File dir = new File (directory, "features"); if (!dir.exists())
152 dir = new File (directory);
153 dirs[i] = dir;
154 }
155
156 URL [] newUrls = PluginPathFinder.scanLocations(dirs);
157
158 URL [] result = new URL [featureURLs.length + newUrls.length];
159 System.arraycopy(featureURLs, 0, result, 0, featureURLs.length);
160 System.arraycopy(newUrls, 0, result, featureURLs.length, newUrls.length);
161 return createModels(result, monitor);
162 }
163 return new IFeatureModel[0];
164 }
165
166 public void loadModels(String platformHome, String additionalLocations) {
167 IFeatureModel[] oldModels = fModels != null ? fModels : new IFeatureModel[0];
168 fModels = createModels(platformHome, parseAdditionalLocations(additionalLocations), null);
169 fPlatformHome = platformHome;
170 notifyListeners(oldModels, fModels);
171 }
172
173 private ArrayList parseAdditionalLocations(String additionalLocations) {
174 ArrayList result = new ArrayList ();
175 StringTokenizer tokenizer = new StringTokenizer (additionalLocations, ","); while (tokenizer.hasMoreTokens()) {
177 result.add(tokenizer.nextToken().trim());
178 }
179 return result;
180 }
181
182 private void notifyListeners(IFeatureModel[] oldModels,
183 IFeatureModel[] newFeatureModels) {
184 if (oldModels.length > 0 || newFeatureModels.length > 0) {
185 int type = 0;
186 if (oldModels.length > 0)
187 type |= IModelProviderEvent.MODELS_REMOVED;
188 if (newFeatureModels.length > 0)
189 type |= IModelProviderEvent.MODELS_ADDED;
190 ModelProviderEvent replacedFeatures = new ModelProviderEvent(this,
191 type, newFeatureModels, oldModels, null);
192 fireModelProviderEvent(replacedFeatures);
193 }
194
195 }
196
197 private synchronized void platformPathChanged(String newHome) {
198 if (!equalPaths(newHome, fPlatformHome)) {
199 loadModels(newHome, fPref.getString(ICoreConstants.ADDITIONAL_LOCATIONS));
200 }
201 }
202
203 public void propertyChange(PropertyChangeEvent event) {
204 if (!ICoreConstants.PLATFORM_PATH.equals(event.getProperty())) {
205 return;
206 }
207 String newHome = getPathString(event.getNewValue());
208 platformPathChanged(newHome);
209 }
210
211 public void removeModelProviderListener(IModelProviderListener listener) {
212 fListeners.remove(listener);
213 }
214
215 public synchronized void shutdown() {
216 fPref.removePropertyChangeListener(this);
217 }
218
219 public synchronized void startup() {
220 fPref.addPropertyChangeListener(this);
221 loadModels(fPref.getString(ICoreConstants.PLATFORM_PATH), fPref.getString(ICoreConstants.ADDITIONAL_LOCATIONS));
222 }
223
224 public synchronized void reload() {
225 loadModels(fPref.getString(ICoreConstants.PLATFORM_PATH), fPref.getString(ICoreConstants.ADDITIONAL_LOCATIONS));
226 }
227
228 public IFeatureModel[] getModels() {
229 return fModels;
230 }
231 }
232 |
Popular Tags |
Java API By Example, From Geeks To Geeks.