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1
11 package org.eclipse.search2.internal.ui;
12
13 import java.util.HashMap  ;
14 import java.util.Map ;
15
16 import org.eclipse.core.runtime.IConfigurationElement;
17 import org.eclipse.core.runtime.ISafeRunnable;
18 import org.eclipse.core.runtime.Platform;
19 import org.eclipse.core.runtime.SafeRunner;
20
21 import org.eclipse.jface.util.SafeRunnable;
22
23 import org.eclipse.search.ui.ISearchResult;
24 import org.eclipse.search.ui.ISearchResultPage;
25
26 import org.eclipse.search.internal.ui.SearchPlugin;
27
28 public class SearchPageRegistry {
29
30 public static final String ID_EXTENSION_POINT= "org.eclipse.search.searchResultViewPages"; public static final String ATTRIB_SEARCH_RESULT_CLASS= "searchResultClass"; public static final String ATTRIB_ID= "id";
34 public static final String ATTRIB_LABEL= "label"; public static final String ATTRIB_ICON= "icon";
37 private final Map fResultClassNameToExtension;
38 private final Map fExtensionToInstance;
39 private final IConfigurationElement[] fExtensions;
40
41 public SearchPageRegistry() {
42 fExtensionToInstance= new HashMap ();
43 fResultClassNameToExtension= new HashMap ();
44 fExtensions= Platform.getExtensionRegistry().getConfigurationElementsFor(ID_EXTENSION_POINT);
45 for (int i= 0; i < fExtensions.length; i++) {
46 fResultClassNameToExtension.put(fExtensions[i].getAttribute(ATTRIB_SEARCH_RESULT_CLASS), fExtensions[i]);
47 }
48 }
49
50 public ISearchResultPage findPageForSearchResult(ISearchResult result, boolean create) {
51 Class resultClass= result.getClass();
52 IConfigurationElement configElement= findConfigurationElement(resultClass);
53 if (configElement != null) {
54 return getSearchResultPage(configElement, create);
55 }
56 return null;
57 }
58
59 public ISearchResultPage findPageForPageId(String pageId, boolean create) {
60 IConfigurationElement configElement= findConfigurationElement(pageId);
61 if (configElement != null) {
62 return getSearchResultPage(configElement, create);
63 }
64 return null;
65 }
66
67 public String findLabelForPageId(String pageId) {
68 IConfigurationElement configElement= findConfigurationElement(pageId);
69 if (configElement != null) {
70 return configElement.getAttribute(ATTRIB_LABEL);
71 }
72 return null;
73 }
74
75 private ISearchResultPage getSearchResultPage(final IConfigurationElement configElement, boolean create) {
76 ISearchResultPage instance= (ISearchResultPage) fExtensionToInstance.get(configElement);
77 if (instance == null && create) {
78 final Object [] result= new Object [1];
79
80 ISafeRunnable safeRunnable= new SafeRunnable(SearchMessages.SearchPageRegistry_error_creating_extensionpoint) {
81 public void run() throws Exception {
82 result[0]= configElement.createExecutableExtension("class"); }
84 public void handleException(Throwable e) {
85 SearchPlugin.log(e);
87 }
88 };
89 SafeRunner.run(safeRunnable);
90 if (result[0] instanceof ISearchResultPage) {
91 instance= (ISearchResultPage) result[0];
92 instance.setID(configElement.getAttribute(ATTRIB_ID));
93 fExtensionToInstance.put(configElement, instance);
94 }
95 }
96 return instance;
97 }
98
99 private IConfigurationElement findConfigurationElement(String pageId) {
100 for (int i= 0; i < fExtensions.length; i++) {
101 IConfigurationElement curr= fExtensions[i];
102 if (pageId.equals(curr.getAttribute(ATTRIB_ID))) {
103 return curr;
104 }
105 }
106 return null;
107 }
108
109 private IConfigurationElement findConfigurationElement(Class resultClass) {
110 String className= resultClass.getName();
111 IConfigurationElement configElement= (IConfigurationElement) fResultClassNameToExtension.get(className);
112 if (configElement != null) {
113 return configElement;
114 }
115 Class superclass= resultClass.getSuperclass();
116 if (superclass != null) {
117 IConfigurationElement foundExtension= findConfigurationElement(superclass);
118 if (foundExtension != null) {
119 fResultClassNameToExtension.put(className, configElement);
120 return foundExtension;
121 }
122 }
123
124 Class [] interfaces= resultClass.getInterfaces();
125 for (int i= 0; i < interfaces.length; i++) {
126 IConfigurationElement foundExtension= findConfigurationElement(interfaces[i]);
127 if (foundExtension != null) {
128 fResultClassNameToExtension.put(className, configElement);
129 return foundExtension;
130 }
131 }
132 return null;
133 }
134
135
136
137 }
138 |
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