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1
11 package org.eclipse.jdt.internal.ui.text.java;
12
13 import java.util.ArrayList  ;
14 import java.util.Arrays ;
15 import java.util.Collection ;
16 import java.util.Iterator ;
17 import java.util.LinkedHashMap ;
18 import java.util.List ;
19 import java.util.Map ;
20
21 import org.eclipse.core.runtime.Assert;
22 import org.eclipse.core.runtime.IConfigurationElement;
23 import org.eclipse.core.runtime.IExtensionRegistry;
24 import org.eclipse.core.runtime.IStatus;
25 import org.eclipse.core.runtime.InvalidRegistryObjectException;
26 import org.eclipse.core.runtime.Platform;
27 import org.eclipse.core.runtime.Status;
28
29 import org.eclipse.jface.dialogs.MessageDialog;
30 import org.eclipse.jface.preference.IPreferenceStore;
31
32 import org.eclipse.jdt.internal.corext.util.Messages;
33
34 import org.eclipse.jdt.ui.PreferenceConstants;
35
36 import org.eclipse.jdt.internal.ui.JavaPlugin;
37
38
41 public final class ProposalSorterRegistry {
42 private static final String EXTENSION_POINT= "javaCompletionProposalSorters"; private static final String DEFAULT_ID= "org.eclipse.jdt.ui.RelevanceSorter";
45 private static ProposalSorterRegistry fInstance;
46
47 public static synchronized ProposalSorterRegistry getDefault() {
48 if (fInstance == null)
49 fInstance= new ProposalSorterRegistry(JavaPlugin.getDefault().getPreferenceStore(), PreferenceConstants.CODEASSIST_SORTER);
50 return fInstance;
51 }
52
53 private final IPreferenceStore fPreferenceStore;
54 private final String fKey;
55
56 private Map fSorters= null;
57 private ProposalSorterHandle fDefaultSorter;
58
59 private ProposalSorterRegistry(final IPreferenceStore preferenceStore, final String key) {
60 Assert.isTrue(preferenceStore != null);
61 Assert.isTrue(key != null);
62 fPreferenceStore= preferenceStore;
63 fKey= key;
64 }
65
66 public ProposalSorterHandle getCurrentSorter() {
67 ensureSortersRead();
68 String id= fPreferenceStore.getString(fKey);
69 ProposalSorterHandle sorter= (ProposalSorterHandle) fSorters.get(id);
70 return sorter != null ? sorter : fDefaultSorter;
71 }
72
73 private synchronized void ensureSortersRead() {
74 if (fSorters != null)
75 return;
76
77 Map sorters= new LinkedHashMap ();
78 IExtensionRegistry registry= Platform.getExtensionRegistry();
79 List elements= new ArrayList (Arrays.asList(registry.getConfigurationElementsFor(JavaPlugin.getPluginId(), EXTENSION_POINT)));
80
81 for (Iterator iter= elements.iterator(); iter.hasNext();) {
82 IConfigurationElement element= (IConfigurationElement) iter.next();
83
84 try {
85
86 ProposalSorterHandle handle= new ProposalSorterHandle(element);
87 final String id= handle.getId();
88 sorters.put(id, handle);
89 if (DEFAULT_ID.equals(id))
90 fDefaultSorter= handle;
91
92 } catch (InvalidRegistryObjectException x) {
93
98 Object [] args= { element.toString() };
99 String message= Messages.format(JavaTextMessages.CompletionProposalComputerRegistry_invalid_message, args);
100 IStatus status= new Status(IStatus.WARNING, JavaPlugin.getPluginId(), IStatus.OK, message, x);
101 informUser(status);
102 }
103 }
104
105 fSorters= sorters;
106 }
107
108 private void informUser(IStatus status) {
109 JavaPlugin.log(status);
110 String title= JavaTextMessages.CompletionProposalComputerRegistry_error_dialog_title;
111 String message= status.getMessage();
112 MessageDialog.openError(JavaPlugin.getActiveWorkbenchShell(), title, message);
113 }
114
115 public ProposalSorterHandle[] getSorters() {
116 ensureSortersRead();
117 Collection sorters= fSorters.values();
118 return (ProposalSorterHandle[]) sorters.toArray(new ProposalSorterHandle[sorters.size()]);
119 }
120
121 public void select(ProposalSorterHandle handle) {
122 Assert.isTrue(handle != null);
123 String id= handle.getId();
124
125 fPreferenceStore.setValue(fKey, id);
126 }
127 }
128 |
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