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20 package org.apache.log4j.chainsaw;
21
22 import java.util.Collection;
23 import java.util.Collections;
24 import java.util.HashSet;
25 import java.util.Set;
26
27 import javax.swing.event.EventListenerList;
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35 public class LoggerNameModelSupport implements LoggerNameModel {
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37 private Set loggerNameSet = new HashSet();
38 private EventListenerList listenerList = new EventListenerList();
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44 public Collection getLoggerNames() {
45 return Collections.unmodifiableSet(loggerNameSet);
46 }
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50
51 public boolean addLoggerName(String loggerName) {
52 boolean isNew = loggerNameSet.add(loggerName);
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54 if(isNew)
55 {
56 notifyListeners(loggerName);
57 }
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59 return isNew;
60 }
61
62 public void reset() {
63 loggerNameSet.clear();
64 LoggerNameListener[] eventListeners = (LoggerNameListener[]) listenerList.getListeners(LoggerNameListener.class);
65
66 for (int i = 0; i < eventListeners.length; i++)
67 {
68 LoggerNameListener listener = eventListeners[i];
69 listener.reset();
70 }
71 }
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78 private void notifyListeners(String loggerName)
79 {
80 LoggerNameListener[] eventListeners = (LoggerNameListener[]) listenerList.getListeners(LoggerNameListener.class);
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82 for (int i = 0; i < eventListeners.length; i++)
83 {
84 LoggerNameListener listener = eventListeners[i];
85 listener.loggerNameAdded(loggerName);
86 }
87 }
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92 public void addLoggerNameListener(LoggerNameListener l) {
93 listenerList.add(LoggerNameListener.class, l);
94 }
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99 public void removeLoggerNameListener(LoggerNameListener l) {
100 listenerList.remove(LoggerNameListener.class, l);
101 }
102 }