001/* ServantLocatorPOA.java -- 002 Copyright (C) 2005, 2006 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package org.omg.PortableServer; 040 041import gnu.CORBA.Poa.gnuServantObject; 042 043import org.omg.CORBA.NO_IMPLEMENT; 044import org.omg.CORBA.ORB; 045import org.omg.CORBA.SystemException; 046import org.omg.CORBA.portable.InputStream; 047import org.omg.CORBA.portable.InvokeHandler; 048import org.omg.CORBA.portable.OutputStream; 049import org.omg.CORBA.portable.ResponseHandler; 050import 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 */ 067public 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}