1 /* ServantDelegateImpl.java -- 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package gnu.CORBA.Poa; 40 41 import gnu.CORBA.Unexpected; 42 43 import org.omg.CORBA.NO_IMPLEMENT; 44 import org.omg.CORBA.ORB; 45 import org.omg.CORBA.ORBPackage.InvalidName; 46 import org.omg.CORBA.Object; 47 import org.omg.PortableServer.CurrentPackage.NoContext; 48 import org.omg.PortableServer.POA; 49 import org.omg.PortableServer.POAHelper; 50 import org.omg.PortableServer.Servant; 51 import org.omg.PortableServer.portable.Delegate; 52 53 /** 54 * The implementation of the servant delegate for the locally existing 55 * servant.The associated servant that must also implement the 56 * {@link InvokeHandler} interface. Each servant requires a separate 57 * instance of this delegate and can serve a single object only. 58 * Hence the fields are final, but the delegate is typically reused 59 * unless the same servant is connected to different objects. 60 * 61 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 62 */ 63 public class ServantDelegateImpl 64 implements Delegate 65 { 66 /** 67 * The servant, associated with this object. 68 */ 69 final Servant servant; 70 71 /** 72 * The servant (not object) id. 73 */ 74 final byte[] servant_id; 75 76 /** 77 * The POA, where the servant is connected. 78 */ 79 final gnuPOA poa; 80 81 /** 82 * The object, exposed as an object, served by this servant. 83 */ 84 final gnuServantObject object; 85 86 /** 87 * Create the delegat for the servant that will be connected to the 88 * given poa. The method is normally called from inside of gnuPOA. 89 * The constructor sets the newly created delegate as the delegate to this 90 * servant by calling Servant._set_delegate. 91 * 92 * @param a_poa the poa. 93 * @param a_servant the servant. 94 * @param a_servant_id the servant id. 95 */ ServantDelegateImpl(Servant a_servant, gnuPOA a_poa, byte[] a_servant_id)96 public ServantDelegateImpl(Servant a_servant, gnuPOA a_poa, byte[] a_servant_id) 97 { 98 poa = a_poa; 99 servant = a_servant; 100 servant_id = a_servant_id; 101 servant._set_delegate(this); 102 object = 103 new gnuServantObject(servant, servant_id, (ORB_1_4) servant._orb(), a_poa); 104 object._set_delegate(new LocalDelegate(object, poa, a_servant_id)); 105 } 106 107 /** 108 * Check if this object could be named by the given repository id. 109 * @param idl_id the repository id to check. 110 * 111 * @return true if it is one of the possible repository ids of this 112 * object. 113 */ is_a(Servant a_servant, String idl_id)114 public boolean is_a(Servant a_servant, String idl_id) 115 { 116 same(a_servant); 117 118 String[] maybe = object.repository_ids; 119 if (maybe == null) 120 maybe = servant._all_interfaces(poa, object.Id); 121 for (int i = 0; i < maybe.length; i++) 122 { 123 if (maybe [ i ].equals(idl_id)) 124 return true; 125 } 126 return false; 127 } 128 129 /** 130 * Return the ORB's default POA. 131 */ default_POA(Servant a_servant)132 public POA default_POA(Servant a_servant) 133 { 134 same(a_servant); 135 try 136 { 137 return POAHelper.narrow(orb(a_servant).resolve_initial_references("RootPOA")); 138 } 139 catch (InvalidName ex) 140 { 141 throw new Unexpected(ex); 142 } 143 } 144 145 /** 146 * Get ORB. 147 */ orb(Servant a_servant)148 public ORB orb(Servant a_servant) 149 { 150 same(a_servant); 151 return poa.orb(); 152 } 153 154 /** 155 * Get the object, exposing the servant. 156 */ this_object(Servant a_servant)157 public Object this_object(Servant a_servant) 158 { 159 same(a_servant); 160 try 161 { 162 return poa.aom.get(poa.m_orb.currents.get_object_id()).object; 163 } 164 catch (NoContext ex) 165 { 166 return object; 167 } 168 } 169 170 /** 171 * Not supported. 172 * 173 * @specnote Same as for Sun up till 1.5 inclusive. 174 */ get_interface_def(Servant a_servant)175 public Object get_interface_def(Servant a_servant) 176 { 177 same(a_servant); 178 throw new NO_IMPLEMENT(); 179 } 180 181 /** 182 * Get the Id of the object being currently served. 183 */ object_id(Servant a_servant)184 public byte[] object_id(Servant a_servant) 185 { 186 same(a_servant); 187 try 188 { 189 byte[] id = poa.m_orb.currents.get_object_id(); 190 return id; 191 } 192 catch (NoContext ex) 193 { 194 return object.Id; 195 } 196 } 197 198 /** 199 * Always returns false; 200 */ non_existent(Servant a_servant)201 public boolean non_existent(Servant a_servant) 202 { 203 same(a_servant); 204 return false; 205 } 206 207 /** 208 * Return the associated POA. 209 */ poa(Servant a_servant)210 public POA poa(Servant a_servant) 211 { 212 same(a_servant); 213 try 214 { 215 return poa.m_orb.currents.get_POA(); 216 } 217 catch (NoContext ex) 218 { 219 return poa; 220 } 221 } 222 223 /** 224 * Checks if the passed servant is the same as the servant, associated with 225 * this delegate. This class requires a single servant per delegate. 226 */ same(Servant some_servant)227 void same(Servant some_servant) 228 { 229 if (servant != some_servant) 230 throw new InternalError("Only one servant per delegate is supported."); 231 } 232 } 233