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1
11
12 package org.eclipse.ui.internal.statushandlers;
13
14 import java.util.ArrayList  ;
15 import java.util.Iterator ;
16 import java.util.List ;
17
18 import org.eclipse.core.runtime.IConfigurationElement;
19 import org.eclipse.core.runtime.IExtension;
20 import org.eclipse.core.runtime.IExtensionPoint;
21 import org.eclipse.core.runtime.Platform;
22 import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;
23 import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;
24 import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;
25 import org.eclipse.ui.PlatformUI;
26 import org.eclipse.ui.internal.WorkbenchPlugin;
27
28
34 public class StatusHandlerRegistry implements IExtensionChangeHandler {
35
36 private static final String STATUSHANDLERS_POINT_NAME = "statusHandlers";
38 private static final String TAG_STATUSHANDLER = "statusHandler";
40 private static final String TAG_STATUSHANDLER_PRODUCTBINDING = "statusHandlerProductBinding";
42 private ArrayList statusHandlerDescriptors = new ArrayList ();
43
44 private ArrayList productBindingDescriptors = new ArrayList ();
45
46 private StatusHandlerDescriptorsMap statusHandlerDescriptorsMap;
47
48 private StatusHandlerDescriptor defaultHandlerDescriptor;
49
50 private static StatusHandlerRegistry instance;
51
52
55 private StatusHandlerRegistry() {
56 IExtensionTracker tracker = PlatformUI.getWorkbench()
57 .getExtensionTracker();
58 IExtensionPoint handlersPoint = Platform.getExtensionRegistry()
59 .getExtensionPoint(WorkbenchPlugin.PI_WORKBENCH,
60 STATUSHANDLERS_POINT_NAME);
61 IExtension[] extensions = handlersPoint.getExtensions();
62
63 statusHandlerDescriptorsMap = new StatusHandlerDescriptorsMap();
64
65 for (int i = 0; i < extensions.length; i++) {
67 addExtension(tracker, extensions[i]);
68 }
69
70 tracker.registerHandler(this, ExtensionTracker
71 .createExtensionPointFilter(handlersPoint));
72
73 IExtensionPoint productsPoint = Platform.getExtensionRegistry()
76 .getExtensionPoint(Platform.PI_RUNTIME, Platform.PT_PRODUCT);
77
78 tracker.registerHandler(this, ExtensionTracker
79 .createExtensionPointFilter(productsPoint));
80 }
81
82
87 public static StatusHandlerRegistry getDefault() {
88 if (instance == null) {
89 instance = new StatusHandlerRegistry();
90 }
91 return instance;
92 }
93
94
100 public void addExtension(IExtensionTracker tracker, IExtension extension) {
101 IConfigurationElement[] configElements = extension
102 .getConfigurationElements();
103 for (int j = 0; j < configElements.length; j++) {
104 if (configElements[j].getName().equals(TAG_STATUSHANDLER)) {
105 StatusHandlerDescriptor descriptor = new StatusHandlerDescriptor(
106 configElements[j]);
107 tracker.registerObject(extension, descriptor,
108 IExtensionTracker.REF_STRONG);
109 statusHandlerDescriptors.add(descriptor);
110 } else if (configElements[j].getName().equals(
111 TAG_STATUSHANDLER_PRODUCTBINDING)) {
112 StatusHandlerProductBindingDescriptor descriptor = new StatusHandlerProductBindingDescriptor(
113 configElements[j]);
114 tracker.registerObject(extension, descriptor,
115 IExtensionTracker.REF_STRONG);
116 productBindingDescriptors.add(descriptor);
117 }
118 }
119 buildHandlersStructure();
120 }
121
122
128 public void removeExtension(IExtension extension, Object [] objects) {
129 for (int i = 0; i < objects.length; i++) {
130 if (objects[i] instanceof StatusHandlerDescriptor) {
131 statusHandlerDescriptors.remove(objects[i]);
132 } else if (objects[i] instanceof StatusHandlerProductBindingDescriptor) {
133 productBindingDescriptors.remove(objects[i]);
134 }
135 }
136 buildHandlersStructure();
137 }
138
139
145 public StatusHandlerDescriptor getDefaultHandlerDescriptor() {
146 return defaultHandlerDescriptor;
147 }
148
149
156 public List getHandlerDescriptors(String pluginId) {
157 return statusHandlerDescriptorsMap.getHandlerDescriptors(pluginId);
158 }
159
160
167 public StatusHandlerDescriptor getHandlerDescriptor(String statusHandlerId) {
168 StatusHandlerDescriptor descriptor = null;
169 for (Iterator it = statusHandlerDescriptors.iterator(); it.hasNext();) {
170 descriptor = (StatusHandlerDescriptor) it.next();
171 if (descriptor.getId().equals(statusHandlerId)) {
172 return descriptor;
173 }
174 }
175
176 if (defaultHandlerDescriptor != null
177 && defaultHandlerDescriptor.getId().equals(statusHandlerId)) {
178 return defaultHandlerDescriptor;
179 }
180
181 return null;
182 }
183
184
187 public void dispose() {
188 PlatformUI.getWorkbench().getExtensionTracker().unregisterHandler(this);
189 }
190
191
195 private void buildHandlersStructure() {
196 statusHandlerDescriptorsMap.clear();
197 defaultHandlerDescriptor = null;
198
199 String productId = Platform.getProduct() != null ? Platform
200 .getProduct().getId() : null;
201
202 List allHandlers = new ArrayList ();
203
204 String defaultHandlerId = null;
205
206 for (Iterator it = productBindingDescriptors.iterator(); it.hasNext();) {
207 StatusHandlerProductBindingDescriptor descriptor = ((StatusHandlerProductBindingDescriptor) it
208 .next());
209
210 if (descriptor.getProductId().equals(productId)) {
211 defaultHandlerId = descriptor.getHandlerId();
212 }
213 }
214
215 for (Iterator it = statusHandlerDescriptors.iterator(); it.hasNext();) {
216 StatusHandlerDescriptor descriptor = ((StatusHandlerDescriptor) it
217 .next());
218
219 allHandlers.add(descriptor);
220 }
221
222 StatusHandlerDescriptor handlerDescriptor = null;
223
224 for (Iterator it = allHandlers.iterator(); it.hasNext();) {
225 handlerDescriptor = (StatusHandlerDescriptor) it.next();
226
227 if (handlerDescriptor.getId().equals(defaultHandlerId)) {
228 defaultHandlerDescriptor = handlerDescriptor;
229 } else {
230 statusHandlerDescriptorsMap
231 .addHandlerDescriptor(handlerDescriptor);
232 }
233 }
234 }
235 }
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