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1
11
12 package org.eclipse.ui.internal.contexts;
13
14 import java.util.ArrayList  ;
15 import java.util.Collections ;
16 import java.util.List ;
17
18 abstract class AbstractContextRegistry implements IContextRegistry {
19 protected List contextContextBindingDefinitions = Collections.EMPTY_LIST;
20 protected List contextDefinitions = Collections.EMPTY_LIST;
21 private ContextRegistryEvent contextRegistryEvent;
22 private List contextRegistryListeners;
23
24 protected AbstractContextRegistry() {
25 }
26
27 public void addContextRegistryListener(IContextRegistryListener contextRegistryListener) {
28 if (contextRegistryListener == null)
29 throw new NullPointerException ();
30
31 if (contextRegistryListeners == null)
32 contextRegistryListeners = new ArrayList ();
33
34 if (!contextRegistryListeners.contains(contextRegistryListener))
35 contextRegistryListeners.add(contextRegistryListener);
36 }
37
38 protected void fireContextRegistryChanged() {
39 if (contextRegistryListeners != null) {
40 for (int i = 0; i < contextRegistryListeners.size(); i++) {
41 if (contextRegistryEvent == null)
42 contextRegistryEvent = new ContextRegistryEvent(this);
43
44 (
45 (IContextRegistryListener) contextRegistryListeners.get(
46 i)).contextRegistryChanged(
47 contextRegistryEvent);
48 }
49 }
50 }
51
52 public List getContextContextBindingDefinitions() {
53 return contextContextBindingDefinitions;
54 }
55
56 public List getContextDefinitions() {
57 return contextDefinitions;
58 }
59
60 public void removeContextRegistryListener(IContextRegistryListener contextRegistryListener) {
61 if (contextRegistryListener == null)
62 throw new NullPointerException ();
63
64 if (contextRegistryListeners != null)
65 contextRegistryListeners.remove(contextRegistryListener);
66 }
67 }
68 |
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