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1
11 package org.eclipse.jdt.internal.ui.filters;
12
13 import com.ibm.icu.text.Collator;
14
15 import java.util.ArrayList  ;
16 import java.util.HashSet ;
17 import java.util.List ;
18 import java.util.Set ;
19
20 import org.eclipse.core.runtime.Assert;
21 import org.eclipse.core.runtime.IConfigurationElement;
22 import org.eclipse.core.runtime.IExtensionRegistry;
23 import org.eclipse.core.runtime.ISafeRunnable;
24 import org.eclipse.core.runtime.Platform;
25 import org.eclipse.core.runtime.SafeRunner;
26
27 import org.eclipse.jface.util.SafeRunnable;
28 import org.eclipse.jface.viewers.ViewerFilter;
29
30 import org.eclipse.ui.IPluginContribution;
31 import org.eclipse.ui.activities.WorkbenchActivityHelper;
32
33 import org.eclipse.jdt.internal.corext.util.Messages;
34
35 import org.eclipse.jdt.ui.JavaUI;
36
37
43 public class FilterDescriptor implements Comparable , IPluginContribution {
44
45 private static String PATTERN_FILTER_ID_PREFIX= "_patternFilterId_";
47
48 private static final String EXTENSION_POINT_NAME= "javaElementFilters";
50 private static final String FILTER_TAG= "filter";
52 private static final String PATTERN_ATTRIBUTE= "pattern"; private static final String ID_ATTRIBUTE= "id";
57 private static final String VIEW_ID_ATTRIBUTE= "viewId"; private static final String TARGET_ID_ATTRIBUTE= "targetId"; private static final String CLASS_ATTRIBUTE= "class"; private static final String NAME_ATTRIBUTE= "name"; private static final String ENABLED_ATTRIBUTE= "enabled"; private static final String DESCRIPTION_ATTRIBUTE= "description";
66 private static final String SELECTED_ATTRIBUTE= "selected";
68 private static FilterDescriptor[] fgFilterDescriptors;
69
70
71 private IConfigurationElement fElement;
72
73
76 public static FilterDescriptor[] getFilterDescriptors() {
77 if (fgFilterDescriptors == null) {
78 IExtensionRegistry registry= Platform.getExtensionRegistry();
79 IConfigurationElement[] elements= registry.getConfigurationElementsFor(JavaUI.ID_PLUGIN, EXTENSION_POINT_NAME);
80 fgFilterDescriptors= createFilterDescriptors(elements);
81 }
82 return fgFilterDescriptors;
83 }
84
88 public static FilterDescriptor[] getFilterDescriptors(String targetId) {
89 FilterDescriptor[] filterDescs= FilterDescriptor.getFilterDescriptors();
90 List result= new ArrayList (filterDescs.length);
91 for (int i= 0; i < filterDescs.length; i++) {
92 String tid= filterDescs[i].getTargetId();
93 if (WorkbenchActivityHelper.filterItem(filterDescs[i]))
94 continue;
95 if (tid == null || tid.equals(targetId))
96 result.add(filterDescs[i]);
97 }
98 return (FilterDescriptor[])result.toArray(new FilterDescriptor[result.size()]);
99 }
100
101
104 private FilterDescriptor(IConfigurationElement element) {
105 fElement= element;
106 Assert.isTrue(isPatternFilter() ^ isCustomFilter(), "An extension for extension-point org.eclipse.jdt.ui.javaElementFilters does not specify a correct filter"); Assert.isNotNull(getId(), "An extension for extension-point org.eclipse.jdt.ui.javaElementFilters does not provide a valid ID"); Assert.isNotNull(getName(), "An extension for extension-point org.eclipse.jdt.ui.javaElementFilters does not provide a valid name"); }
111
112
116 public ViewerFilter createViewerFilter() {
117 if (!isCustomFilter())
118 return null;
119
120 final ViewerFilter[] result= new ViewerFilter[1];
121 String message= Messages.format(FilterMessages.FilterDescriptor_filterCreationError_message, getId());
122 ISafeRunnable code= new SafeRunnable(message) {
123
126 public void run() throws Exception {
127 result[0]= (ViewerFilter)fElement.createExecutableExtension(CLASS_ATTRIBUTE);
128 }
129
130 };
131 SafeRunner.run(code);
132 return result[0];
133 }
134
135
137
145 public String getId() {
146 if (isPatternFilter()) {
147 String targetId= getTargetId();
148 if (targetId == null)
149 return PATTERN_FILTER_ID_PREFIX + getPattern();
150 else
151 return targetId + PATTERN_FILTER_ID_PREFIX + getPattern();
152 } else
153 return fElement.getAttribute(ID_ATTRIBUTE);
154 }
155
156
163 public String getName() {
164 String name= fElement.getAttribute(NAME_ATTRIBUTE);
165 if (name == null && isPatternFilter())
166 name= getPattern();
167 return name;
168 }
169
170
175 public String getPattern() {
176 return fElement.getAttribute(PATTERN_ATTRIBUTE);
177 }
178
179
185 public String getTargetId() {
186 String tid= fElement.getAttribute(TARGET_ID_ATTRIBUTE);
187
188 if (tid != null)
189 return tid;
190
191 return fElement.getAttribute(VIEW_ID_ATTRIBUTE);
193
194 }
195
196
201 public String getDescription() {
202 String description= fElement.getAttribute(DESCRIPTION_ATTRIBUTE);
203 if (description == null)
204 description= ""; return description;
206 }
207
208
211 public boolean isPatternFilter() {
212 return getPattern() != null;
213 }
214
215
218 public boolean isCustomFilter() {
219 return fElement.getAttribute(CLASS_ATTRIBUTE) != null;
220 }
221
222
228 public boolean isEnabled() {
229 String strVal= fElement.getAttribute(ENABLED_ATTRIBUTE);
230 if (strVal == null)
231 strVal= fElement.getAttribute(SELECTED_ATTRIBUTE);
233 return strVal == null || Boolean.valueOf(strVal).booleanValue();
234 }
235
236
239 public int compareTo(Object o) {
240 if (o instanceof FilterDescriptor)
241 return Collator.getInstance().compare(getName(), ((FilterDescriptor)o).getName());
242 else
243 return Integer.MIN_VALUE;
244 }
245
246
248
251 private static FilterDescriptor[] createFilterDescriptors(IConfigurationElement[] elements) {
252 List result= new ArrayList (5);
253 Set descIds= new HashSet (5);
254 for (int i= 0; i < elements.length; i++) {
255 final IConfigurationElement element= elements[i];
256 if (FILTER_TAG.equals(element.getName())) {
257
258 final FilterDescriptor[] desc= new FilterDescriptor[1];
259 SafeRunner.run(new SafeRunnable(FilterMessages.FilterDescriptor_filterDescriptionCreationError_message) {
260 public void run() throws Exception {
261 desc[0]= new FilterDescriptor(element);
262 }
263 });
264
265 if (desc[0] != null && !descIds.contains(desc[0].getId())) {
266 result.add(desc[0]);
267 descIds.add(desc[0].getId());
268 }
269 }
270 }
271 return (FilterDescriptor[])result.toArray(new FilterDescriptor[result.size()]);
272 }
273
274 public String getLocalId() {
275 return fElement.getAttribute(ID_ATTRIBUTE);
276 }
277
278 public String getPluginId() {
279 return fElement.getContributor().getName();
280 }
281 }
282 |
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