Source for org.omg.PortableServer.ServantLocatorPOA

   1: /* ServantLocatorPOA.java --
   2:    Copyright (C) 2005, 2006 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 org.omg.PortableServer;
  40: 
  41: import gnu.CORBA.Poa.gnuServantObject;
  42: 
  43: import org.omg.CORBA.NO_IMPLEMENT;
  44: import org.omg.CORBA.ORB;
  45: import org.omg.CORBA.SystemException;
  46: import org.omg.CORBA.portable.InputStream;
  47: import org.omg.CORBA.portable.InvokeHandler;
  48: import org.omg.CORBA.portable.OutputStream;
  49: import org.omg.CORBA.portable.ResponseHandler;
  50: import org.omg.PortableServer.ServantLocatorPackage.CookieHolder;
  51: 
  52: /**
  53:  * <p>The ServantLocator stub is an optional base for the
  54:  * servant locators. It cannot serve remote invocations, as
  55:  * methods in {@link ServantLocatorOperations} take POA as one of parameters.
  56:  * Both JDK 1.5 API and OMG specifies that POA is a local object that must not
  57:  * be transferred to the remote invocation target.
  58:  * </p><p>
  59:  * You do not need to derive your servant locator from this stub,
  60:  * it is enough to implement the {@link ServantLocator} interface.
  61:  * But you may choose to do this if you need its functional
  62:  * {@link org.omg.PortableServer.ServantActivatorPOA.delegator#_ids()} 
  63:  * method or want to keep default behaviour during pre- or post- invokcations.
  64:  * </p>
  65:  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  66:  */
  67: public abstract class ServantLocatorPOA
  68:   extends Servant
  69:   implements ServantLocatorOperations, InvokeHandler
  70: {
  71:   /**
  72:    * Used to access the outer class in the nested classes.
  73:    */
  74:   final ServantLocatorPOA THIS = this;
  75: 
  76:   /**
  77:    * Our implementation will not call this method. After setting your
  78:    * manager to POA, it will call incarnate and etherialize directly.
  79:    */
  80:   public OutputStream _invoke(String method, InputStream input,
  81:                               ResponseHandler handler
  82:                              )
  83:                        throws SystemException
  84:   {
  85:     throw new NO_IMPLEMENT();
  86:   }
  87: 
  88:   /**
  89:    * Returns an array of interfaces, supported by the servant locator.
  90:    */
  91:   public String[] _all_interfaces(POA poa, byte[] Object_Id)
  92:   {
  93:     return new _ServantLocatorStub()._ids();
  94:   }
  95: 
  96:   /**
  97:    * Return the complete instance of the servant activator, based on
  98:    * the current class (ServantActivatorPOA or derived).
  99:    */
 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:   }