001 /* ServantLocatorPOA.java -- 002 Copyright (C) 2005, 2006 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package org.omg.PortableServer; 040 041 import gnu.CORBA.Poa.gnuServantObject; 042 043 import org.omg.CORBA.NO_IMPLEMENT; 044 import org.omg.CORBA.ORB; 045 import org.omg.CORBA.SystemException; 046 import org.omg.CORBA.portable.InputStream; 047 import org.omg.CORBA.portable.InvokeHandler; 048 import org.omg.CORBA.portable.OutputStream; 049 import org.omg.CORBA.portable.ResponseHandler; 050 import org.omg.PortableServer.ServantLocatorPackage.CookieHolder; 051 052 /** 053 * <p>The ServantLocator stub is an optional base for the 054 * servant locators. It cannot serve remote invocations, as 055 * methods in {@link ServantLocatorOperations} take POA as one of parameters. 056 * Both JDK 1.5 API and OMG specifies that POA is a local object that must not 057 * be transferred to the remote invocation target. 058 * </p><p> 059 * You do not need to derive your servant locator from this stub, 060 * it is enough to implement the {@link ServantLocator} interface. 061 * But you may choose to do this if you need its functional 062 * {@link org.omg.PortableServer.ServantActivatorPOA.delegator#_ids()} 063 * method or want to keep default behaviour during pre- or post- invokcations. 064 * </p> 065 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 066 */ 067 public abstract class ServantLocatorPOA 068 extends Servant 069 implements ServantLocatorOperations, InvokeHandler 070 { 071 /** 072 * Used to access the outer class in the nested classes. 073 */ 074 final ServantLocatorPOA THIS = this; 075 076 /** 077 * Our implementation will not call this method. After setting your 078 * manager to POA, it will call incarnate and etherialize directly. 079 */ 080 public OutputStream _invoke(String method, InputStream input, 081 ResponseHandler handler 082 ) 083 throws SystemException 084 { 085 throw new NO_IMPLEMENT(); 086 } 087 088 /** 089 * Returns an array of interfaces, supported by the servant locator. 090 */ 091 public String[] _all_interfaces(POA poa, byte[] Object_Id) 092 { 093 return new _ServantLocatorStub()._ids(); 094 } 095 096 /** 097 * Return the complete instance of the servant activator, based on 098 * the current class (ServantActivatorPOA or derived). 099 */ 100 public ServantLocator _this() 101 { 102 return new delegator(this); 103 } 104 105 /** 106 * Return the complete instance of the servant activator, based on 107 * the current class (ServantActivatorPOA or derived). 108 */ 109 public ServantLocator _this(ORB orb) 110 { 111 return new delegator(this); 112 } 113 114 /** 115 * This class is used to support _this. 116 */ 117 class delegator 118 extends gnuServantObject 119 implements ServantLocator 120 { 121 delegator(Servant s) 122 { 123 super(s, new byte[ 0 ], null, null); 124 } 125 126 public Servant preinvoke(byte[] Object_Id, POA poa, String method, 127 CookieHolder cookie_holder 128 ) 129 throws org.omg.PortableServer.ForwardRequest 130 { 131 return THIS.preinvoke(Object_Id, poa, method, cookie_holder); 132 } 133 134 public void postinvoke(byte[] Object_Id, POA poa, String method, 135 java.lang.Object cookie, Servant servant 136 ) 137 { 138 THIS.postinvoke(Object_Id, poa, method, cookie, servant); 139 } 140 141 public String[] _ids() 142 { 143 return THIS._all_interfaces(null, null); 144 } 145 } 146 }