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16 package org.mortbay.jetty.plus.annotation;
17
18 import java.util.ArrayList;
19 import java.util.HashMap;
20 import java.util.Iterator;
21 import java.util.List;
22 import java.util.Map;
23
24 import org.mortbay.log.Log;
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32 public class LifeCycleCallbackCollection
33 {
34 private HashMap postConstructCallbacksMap = new HashMap();
35 private HashMap preDestroyCallbacksMap = new HashMap();
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46 public void add (LifeCycleCallback callback)
47 {
48 if ((callback==null) || (callback.getTargetClass()==null) || (callback.getTarget()==null))
49 return;
50
51 if (Log.isDebugEnabled())
52 Log.debug("Adding callback for class="+callback.getTargetClass()+ " on "+callback.getTarget());
53 Map map = null;
54 if (callback instanceof PreDestroyCallback)
55 map = preDestroyCallbacksMap;
56 if (callback instanceof PostConstructCallback)
57 map = postConstructCallbacksMap;
58
59 if (map == null)
60 throw new IllegalArgumentException ("Unsupported lifecycle callback type: "+callback);
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62
63 List callbacks = (List)map.get(callback.getTargetClass());
64 if (callbacks==null)
65 {
66 callbacks = new ArrayList();
67 map.put(callback.getTargetClass(), callbacks);
68 }
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70
71 if (!callbacks.contains(callback))
72 callbacks.add(callback);
73 }
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82 public void callPostConstructCallback (Object o)
83 throws Exception
84 {
85 if (o == null)
86 return;
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88 List callbacks = (List)postConstructCallbacksMap.get(o.getClass());
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90 if (callbacks == null)
91 return;
92
93 for (int i=0;i<callbacks.size();i++)
94 ((LifeCycleCallback)callbacks.get(i)).callback(o);
95 }
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103 public void callPreDestroyCallback (Object o)
104 throws Exception
105 {
106 if (o == null)
107 return;
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109 List callbacks = (List)preDestroyCallbacksMap.get(o.getClass());
110 if (callbacks == null)
111 return;
112
113 for (int i=0;i<callbacks.size();i++)
114 ((LifeCycleCallback)callbacks.get(i)).callback(o);
115 }
116 }