Proxy


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28   * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
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39   * OF THE POSSIBILITY OF SUCH DAMAGE.
40   *
41   * Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
42   *
43   * $Id: Proxy.java 1921 2005-06-19 22:40:34Z jlaskowski $
44   */
45  
46  
47  package org.openejb.util.proxy;
48  
49  
50  import java.lang.reflect.Method  ;
51  
52  
53  /**
54   * Superclass for dynamically generated proxies.
55   *
56   * This class implements convenience methods that allow us to
57   * generate proxies with considerably less byte-code.
58   *
59   * @author Richard Monson-Haefel
60   * @author David Blevins
61   */
62  public abstract class Proxy implements java.io.Serializable   {
63  
64      public InvocationHandler handler;
65  
66      /**
67       *
68       * @return The implementation of InvocationHandler handling invocations for this Proxy object.
69       */
70      public InvocationHandler getInvocationHandler() {
71          return handler;
72      }
73  
74      public InvocationHandler setInvocationHandler(InvocationHandler newHandler) {
75          InvocationHandler oldHandler = handler;
76          handler = newHandler;
77          return oldHandler;
78      }
79  
80      /**
81       * Used as the Class array in the Class.getMethod( String methodName, Class[] argTypes )
82       * method when the interface method does not define any arguments.
83       */
84      protected static final Class  [] NO_ARGS_C = new Class  [0];
85  
86      /**
87       * Used as the Object array in the Method.invoke( Object obj, Object[] args )
88       * method when the interface method does not define any arguments.
89       */
90      protected static final Object  [] NO_ARGS_O = new Object  [0];
91  
92      protected final void _proxyMethod$throws_default$returns_void(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
93          _proxyMethod$throws_default$returns_Object( methodNumber, methodName, argTypes, args);
94          return;
95      }
96  
97      protected final Object   _proxyMethod$throws_default$returns_Object(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
98          java.lang.reflect.Method   method = _proxyMethod$lookupMethod( methodNumber, methodName, argTypes);
99          try{
100             return handler.invoke(this,method,args);
101         }catch(Throwable   t){
102             // rethrow exceptions
103             if(t instanceof java.rmi.RemoteException  )
104                      throw (java.rmi.RemoteException  )t;
105             if(t instanceof java.lang.RuntimeException  )
106                      throw (java.lang.RuntimeException  )t;
107             else throw _proxyError$(t);
108         }
109     }
110 
111     protected final void _proxyMethod$throws_AppException$returns_void(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
112         _proxyMethod$throws_AppException$returns_Object( methodNumber, methodName, argTypes, args);
113         return;
114     }
115 
116     protected final Object   _proxyMethod$throws_AppException$returns_Object(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   , org.openejb.ApplicationException{
117         java.lang.reflect.Method   method = _proxyMethod$lookupMethod( methodNumber, methodName, argTypes);
118         try{
119             return handler.invoke(this,method,args);
120         }catch(Throwable   t){
121             // rethrow exceptions
122             if(t instanceof java.rmi.RemoteException  )
123                      throw (java.rmi.RemoteException  )t;
124             if(t instanceof java.lang.RuntimeException  )
125                      throw (java.lang.RuntimeException  )t;
126             if(t instanceof org.openejb.ApplicationException)
127                      throw (org.openejb.ApplicationException)t;
128             else throw _proxyError$(t);
129 
130         }
131     }
132 
133     //=============================================================================
134     // Methods that return primitives and only throw the default remote exception
135     //
136 
137     protected final int _proxyMethod$throws_default$returns_int(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
138         Integer   retval = (Integer  )_proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
139         return retval.intValue();
140     }
141 
142     protected final double _proxyMethod$throws_default$returns_double(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
143         Double   retval = (Double  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
144         return retval.doubleValue();
145     }
146 
147 
148     protected final long _proxyMethod$throws_default$returns_long(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
149         Long   retval = (Long  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
150         return retval.longValue();
151     }
152 
153 
154     protected final boolean _proxyMethod$throws_default$returns_boolean(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
155         Boolean   retval = (Boolean  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
156         return retval.booleanValue();
157     }
158 
159 
160     protected final float _proxyMethod$throws_default$returns_float(int methodNumber,String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
161         Float   retval = (Float  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
162         return retval.floatValue();
163     }
164 
165 
166     protected final char _proxyMethod$throws_default$returns_char(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
167         Character   retval = (Character  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
168         return retval.charValue();
169     }
170 
171 
172     protected final byte _proxyMethod$throws_default$returns_byte(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
173         Byte   retval = (Byte  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
174         return retval.byteValue();
175     }
176 
177 
178     protected final short _proxyMethod$throws_default$returns_short(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException   {
179         Short   retval = (Short  ) _proxyMethod$throws_default$returns_Object(methodNumber, methodName, argTypes, args);
180         return retval.shortValue();
181     }
182 
183     //
184     // Methods that return primitives and only throw the default remote exception
185     //=============================================================================
186 
187 
188     //===========================================================
189     // Methods that return primitives and throw an AppException
190     //
191 
192     protected final int _proxyMethod$throws_AppException$returns_int(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
193         Integer   retval = (Integer  )_proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
194         return retval.intValue();
195     }
196 
197     protected final double _proxyMethod$throws_AppException$returns_double(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
198         Double   retval = (Double  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
199         return retval.doubleValue();
200     }
201 
202 
203     protected final long _proxyMethod$throws_AppException$returns_long(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
204         Long   retval = (Long  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
205         return retval.longValue();
206     }
207 
208 
209     protected final boolean _proxyMethod$throws_AppException$returns_boolean(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
210         Boolean   retval = (Boolean  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
211         return retval.booleanValue();
212     }
213 
214 
215     protected final float _proxyMethod$throws_AppException$returns_float(int methodNumber,String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
216         Float   retval = (Float  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
217         return retval.floatValue();
218     }
219 
220 
221     protected final char _proxyMethod$throws_AppException$returns_char(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
222         Character   retval = (Character  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
223         return retval.charValue();
224     }
225 
226 
227     protected final byte _proxyMethod$throws_AppException$returns_byte(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
228         Byte   retval = (Byte  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
229         return retval.byteValue();
230     }
231 
232 
233     protected final short _proxyMethod$throws_AppException$returns_short(int methodNumber, String   methodName, Class  [] argTypes, Object  [] args) throws java.rmi.RemoteException  , org.openejb.ApplicationException {
234         Short   retval = (Short  ) _proxyMethod$throws_AppException$returns_Object(methodNumber, methodName, argTypes, args);
235         return retval.shortValue();
236     }
237 
238     //
239     // Methods that return primitives and throw an AppException
240     //===========================================================
241 
242     protected abstract Method   _proxyMethod$lookupMethod(int index, String   methodName, Class  [] argTypes);
243 
244     protected final Method   _proxyMethod$lookupMethod(Class   interfce, Method   [] methodMap, int index, String   methodName, Class  [] argTypes){
245         // obtain method
246         java.lang.reflect.Method   method = methodMap[index];
247         if(method == null){
248             try{ // Lazily create the method.
249                 method = interfce.getMethod( methodName, argTypes );
250                 methodMap[index] = method;
251             }catch(NoSuchMethodException   nsme){ throw new RuntimeException  ("Method not found:  " +nsme.getMessage());}
252         }
253         return method;
254     }
255 
256     protected final java.rmi.RemoteException   _proxyError$(Throwable   throwable){
257         return new java.rmi.RemoteException  ("[OpenEJB]  Proxy Error: ",throwable );
258     }
259 
260     protected final java.rmi.RemoteException   _proxyError$(org.openejb.ApplicationException ae){
261         return new java.rmi.RemoteException  ("[OpenEJB]  Proxy Error: The returned application exception is not defined in the throws clause.  ", ae.getRootCause());
262     }
263 
264 }
265
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