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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.http.HttpStatus;
29 import org.eclipse.jetty.server.Handler;
30 import org.eclipse.jetty.server.Request;
31 import org.eclipse.jetty.server.Server;
32 import org.eclipse.jetty.util.annotation.ManagedAttribute;
33 import org.eclipse.jetty.util.annotation.ManagedObject;
34 import org.eclipse.jetty.util.component.LifeCycle;
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41 @ManagedObject("Handler wrapping another Handler")
42 public class HandlerWrapper extends AbstractHandlerContainer
43 {
44 protected Handler _handler;
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49
50 public HandlerWrapper()
51 {
52 }
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58 @ManagedAttribute(value="Wrapped Handler", readonly=true)
59 public Handler getHandler()
60 {
61 return _handler;
62 }
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67
68 @Override
69 public Handler[] getHandlers()
70 {
71 if (_handler==null)
72 return new Handler[0];
73 return new Handler[] {_handler};
74 }
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80 public void setHandler(Handler handler)
81 {
82 if (isStarted())
83 throw new IllegalStateException(STARTED);
84
85 if (handler!=null)
86 handler.setServer(getServer());
87
88 Handler old=_handler;
89 _handler=handler;
90 updateBean(old,_handler,true);
91 }
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105 public void insertHandler(HandlerWrapper wrapper)
106 {
107 if (wrapper==null || wrapper.getHandler()!=null)
108 throw new IllegalArgumentException();
109 wrapper.setHandler(getHandler());
110 setHandler(wrapper);
111 }
112
113
114 @Override
115 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
116 {
117 Handler handler=_handler;
118 if (handler!=null)
119 handler.handle(target,baseRequest, request, response);
120 }
121
122
123 @Override
124 protected void expandChildren(List<Handler> list, Class<?> byClass)
125 {
126 expandHandler(_handler,list,byClass);
127 }
128
129
130 @Override
131 public void destroy()
132 {
133 if (!isStopped())
134 throw new IllegalStateException("!STOPPED");
135 Handler child=getHandler();
136 if (child!=null)
137 {
138 setHandler(null);
139 child.destroy();
140 }
141 super.destroy();
142 }
143
144 }