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19 package org.eclipse.jetty.server.handler;
20
21 import java.io.IOException;
22 import java.util.List;
23
24 import javax.servlet.ServletException;
25 import javax.servlet.http.HttpServletRequest;
26 import javax.servlet.http.HttpServletResponse;
27
28 import org.eclipse.jetty.server.Handler;
29 import org.eclipse.jetty.server.Request;
30 import org.eclipse.jetty.server.Server;
31 import org.eclipse.jetty.util.annotation.ManagedAttribute;
32 import org.eclipse.jetty.util.annotation.ManagedObject;
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38
39 @ManagedObject("Handler wrapping another Handler")
40 public class HandlerWrapper extends AbstractHandlerContainer
41 {
42 protected Handler _handler;
43
44
45
46
47
48 public HandlerWrapper()
49 {
50 }
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54
55
56 @ManagedAttribute(value="Wrapped Handler", readonly=true)
57 public Handler getHandler()
58 {
59 return _handler;
60 }
61
62
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64
65
66 @Override
67 public Handler[] getHandlers()
68 {
69 if (_handler==null)
70 return new Handler[0];
71 return new Handler[] {_handler};
72 }
73
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76
77
78 public void setHandler(Handler handler)
79 {
80 if (isStarted())
81 throw new IllegalStateException(STARTED);
82
83 if (handler!=null)
84 handler.setServer(getServer());
85
86 Handler old=_handler;
87 _handler=handler;
88 updateBean(old,_handler);
89 }
90
91
92 @Override
93 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
94 {
95 if (_handler!=null && isStarted())
96 {
97 _handler.handle(target,baseRequest, request, response);
98 }
99 }
100
101
102
103 @Override
104 public void setServer(Server server)
105 {
106 if (server==getServer())
107 return;
108
109 if (isStarted())
110 throw new IllegalStateException(STARTED);
111
112 super.setServer(server);
113 Handler h=getHandler();
114 if (h!=null)
115 h.setServer(server);
116 }
117
118
119
120 @Override
121 protected void expandChildren(List<Handler> list, Class<?> byClass)
122 {
123 expandHandler(_handler,list,byClass);
124 }
125
126
127 @Override
128 public void destroy()
129 {
130 if (!isStopped())
131 throw new IllegalStateException("!STOPPED");
132 Handler child=getHandler();
133 if (child!=null)
134 {
135 setHandler(null);
136 child.destroy();
137 }
138 super.destroy();
139 }
140
141 }