1 /*
   2  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.corba.se.spi.orbutil.proxy ;
  27 
  28 import java.io.Serializable ;
  29 
  30 import java.util.Map ;
  31 import java.util.LinkedHashMap ;
  32 
  33 import java.lang.reflect.Proxy ;
  34 import java.lang.reflect.Method ;
  35 import java.lang.reflect.InvocationHandler ;
  36 
  37 import com.sun.corba.se.spi.logging.CORBALogDomains ;
  38 import com.sun.corba.se.impl.logging.ORBUtilSystemException ;
  39 import com.sun.corba.se.impl.presentation.rmi.DynamicAccessPermission;
  40 
  41 public class CompositeInvocationHandlerImpl implements
  42     CompositeInvocationHandler
  43 {
  44     private Map classToInvocationHandler = new LinkedHashMap() ;
  45     private InvocationHandler defaultHandler = null ;
  46 
  47     public void addInvocationHandler( Class interf,
  48         InvocationHandler handler )
  49     {
  50         checkAccess();
  51         classToInvocationHandler.put( interf, handler ) ;
  52     }
  53 
  54     public void setDefaultHandler( InvocationHandler handler )
  55     {
  56         checkAccess();
  57         defaultHandler = handler ;
  58     }
  59 
  60     public Object invoke( Object proxy, Method method, Object[] args )
  61         throws Throwable
  62     {
  63         // Note that the declaring class in method is the interface
  64         // in which the method was defined, not the proxy class.
  65         Class cls = method.getDeclaringClass() ;
  66         InvocationHandler handler =
  67             (InvocationHandler)classToInvocationHandler.get( cls ) ;
  68 
  69         if (handler == null) {
  70             if (defaultHandler != null)
  71                 handler = defaultHandler ;
  72             else {
  73                 ORBUtilSystemException wrapper = ORBUtilSystemException.get(
  74                     CORBALogDomains.UTIL ) ;
  75                 throw wrapper.noInvocationHandler( "\"" + method.toString() +
  76                     "\"" ) ;
  77             }
  78         }
  79 
  80         // handler should never be null here.
  81 
  82         return handler.invoke( proxy, method, args ) ;
  83     }
  84 
  85     private static final DynamicAccessPermission perm = new DynamicAccessPermission("access");
  86     private void checkAccess() {
  87         final SecurityManager sm = System.getSecurityManager();
  88         if (sm != null) {
  89             sm.checkPermission(perm);
  90 }
  91     }
  92 
  93     private static final long serialVersionUID = 4571178305984833743L;
  94 }