1 /*
   2  * Copyright (c) 2000, 2003, 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.orb ;
  27 
  28 import com.sun.corba.se.spi.orb.ORBVersion ;
  29 import com.sun.corba.se.impl.orb.ORBVersionImpl ;
  30 import org.omg.CORBA.portable.InputStream ;
  31 import org.omg.CORBA.INTERNAL ;
  32 
  33 public class ORBVersionFactory {
  34     private ORBVersionFactory() {} ;
  35 
  36     public static ORBVersion getFOREIGN()
  37     {
  38         return ORBVersionImpl.FOREIGN ;
  39     }
  40 
  41     public static ORBVersion getOLD()
  42     {
  43         return ORBVersionImpl.OLD ;
  44     }
  45 
  46     public static ORBVersion getNEW()
  47     {
  48         return ORBVersionImpl.NEW ;
  49     }
  50 
  51     public static ORBVersion getJDK1_3_1_01()
  52     {
  53         return ORBVersionImpl.JDK1_3_1_01 ;
  54     }
  55 
  56     public static ORBVersion getNEWER()
  57     {
  58         return ORBVersionImpl.NEWER ;
  59     }
  60 
  61     public static ORBVersion getPEORB()
  62     {
  63         return ORBVersionImpl.PEORB ;
  64     }
  65 
  66     /** Return the current version of this ORB
  67      */
  68     public static ORBVersion getORBVersion()
  69     {
  70         return ORBVersionImpl.PEORB ;
  71     }
  72 
  73     public static ORBVersion create( InputStream is )
  74     {
  75         byte value = is.read_octet() ;
  76         return byteToVersion( value ) ;
  77     }
  78 
  79     private static ORBVersion byteToVersion( byte value )
  80     {
  81         /* Throwing an exception here would cause this version to be
  82         * incompatible with future versions of the ORB, to the point
  83         * that this version could
  84         * not even unmarshal objrefs from a newer version that uses
  85         * extended versioning.  Therefore, we will simply treat all
  86         * unknown versions as the latest version.
  87         if (value < 0)
  88             throw new INTERNAL() ;
  89         */
  90 
  91         /**
  92          * Update: If we treat all unknown versions as the latest version
  93          * then when we send an IOR with a PEORB version to an ORB that
  94          * doesn't know the PEORB version it will treat it as whatever
  95          * its idea of the latest version is.  Then, if that IOR is
  96          * sent back to the server and compared with the original
  97          * the equality check will fail because the versions will be
  98          * different.
  99          *
 100          * Instead, just capture the version bytes.
 101          */
 102 
 103         switch (value) {
 104             case ORBVersion.FOREIGN : return ORBVersionImpl.FOREIGN ;
 105             case ORBVersion.OLD : return ORBVersionImpl.OLD ;
 106             case ORBVersion.NEW : return ORBVersionImpl.NEW ;
 107             case ORBVersion.JDK1_3_1_01: return ORBVersionImpl.JDK1_3_1_01 ;
 108             case ORBVersion.NEWER : return ORBVersionImpl.NEWER ;
 109             case ORBVersion.PEORB : return ORBVersionImpl.PEORB ;
 110             default : return new ORBVersionImpl(value);
 111         }
 112     }
 113 }