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11 package org.eclipse.team.internal.ui.registry;
12
13 import java.util.*;
14
15 import org.eclipse.core.runtime.*;
16 import org.eclipse.jface.util.IPropertyChangeListener;
17 import org.eclipse.jface.util.PropertyChangeEvent;
18 import org.eclipse.team.core.mapping.ISynchronizationScope;
19 import org.eclipse.team.internal.ui.TeamUIPlugin;
20 import org.eclipse.team.ui.mapping.ITeamContentProviderDescriptor;
21 import org.eclipse.team.ui.mapping.ITeamContentProviderManager;
22
23
26 public class TeamContentProviderManager implements ITeamContentProviderManager {
27
28 public static final String  PT_TEAM_CONTENT_PROVIDERS = "teamContentProviders";
30 private static ITeamContentProviderManager instance;
31
32 Map descriptors;
33
34 private ListenerList listeners = new ListenerList(ListenerList.IDENTITY);
35
36 public static ITeamContentProviderManager getInstance() {
37 if (instance == null)
38 instance = new TeamContentProviderManager();
39 return instance;
40 }
41
42
45 public ITeamContentProviderDescriptor[] getDescriptors() {
46 lazyInitialize();
47 return (ITeamContentProviderDescriptor[]) descriptors.values().toArray(new ITeamContentProviderDescriptor[descriptors.size()]);
48 }
49
50
53 public String [] getContentProviderIds(ISynchronizationScope scope) {
54 List result = new ArrayList();
55 ITeamContentProviderDescriptor[] descriptors = getDescriptors();
56 for (int i = 0; i < descriptors.length; i++) {
57 ITeamContentProviderDescriptor descriptor = descriptors[i];
58 if (descriptor.isEnabled() && scope.getMappings(descriptor.getModelProviderId()).length > 0)
59 result.add(descriptor.getContentExtensionId());
60 }
61 return (String []) result.toArray(new String [result.size()]);
62 }
63
64
67 public ITeamContentProviderDescriptor getDescriptor(String modelProviderId) {
68 lazyInitialize();
69 return (ITeamContentProviderDescriptor)descriptors.get(modelProviderId);
70 }
71
72 protected void lazyInitialize() {
73 if (descriptors != null)
74 return;
75 IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(TeamUIPlugin.ID, PT_TEAM_CONTENT_PROVIDERS);
76 IExtension[] extensions = point.getExtensions();
77 descriptors = new HashMap(extensions.length * 2);
78 for (int i = 0, imax = extensions.length; i < imax; i++) {
79 ITeamContentProviderDescriptor desc = null;
80 try {
81 desc = new TeamContentProviderDescriptor(extensions[i]);
82 } catch (CoreException e) {
83 TeamUIPlugin.log(e);
84 }
85 if (desc != null)
86 descriptors.put(desc.getModelProviderId(), desc);
87 }
88 }
89
90 public void addPropertyChangeListener(IPropertyChangeListener listener) {
91 listeners.add(listener);
92 }
93
94 public void removePropertyChangeListener(IPropertyChangeListener listener) {
95 listeners.remove(listener);
96 }
97
98 private void firePropertyChange(final PropertyChangeEvent event) {
99 Object [] allListeners = listeners.getListeners();
100 for (int i = 0; i < allListeners.length; i++) {
101 final IPropertyChangeListener listener = (IPropertyChangeListener)allListeners[i];
102 SafeRunner.run(new ISafeRunnable() {
103 public void run() throws Exception {
104 listener.propertyChange(event);
105 }
106 public void handleException(Throwable exception) {
107 }
109 });
110 }
111 }
112
113 public void enablementChanged(ITeamContentProviderDescriptor[] oldEnabled, ITeamContentProviderDescriptor[] newEnabled) {
114 firePropertyChange(new PropertyChangeEvent(this, PROP_ENABLED_MODEL_PROVIDERS, oldEnabled, newEnabled));
115 }
116
117 public void setEnabledDescriptors(ITeamContentProviderDescriptor[] descriptors) {
118 List previouslyEnabled = new ArrayList();
119 for (Iterator iter = this.descriptors.values().iterator(); iter.hasNext();) {
120 TeamContentProviderDescriptor descriptor = (TeamContentProviderDescriptor) iter.next();
121 if (descriptor.isEnabled()) {
122 previouslyEnabled.add(descriptor);
123 descriptor.setEnabled(false);
124 }
125 }
126 for (int i = 0; i < descriptors.length; i++) {
127 TeamContentProviderDescriptor descriptor = (TeamContentProviderDescriptor)descriptors[i];
128 descriptor.setEnabled(true);
129 }
130 enablementChanged(
131 (ITeamContentProviderDescriptor[]) previouslyEnabled.toArray(new ITeamContentProviderDescriptor[previouslyEnabled.size()]),
132 descriptors);
133 }
134 }
135 |
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