libjava/classpath/org/omg/CORBA/UnionMemberHelper.java

   1 /* UnionMemberHelper.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 org.omg.CORBA;
  40
  41 import gnu.CORBA.Minor;
  42 import gnu.CORBA.OrbRestricted;
  43 import gnu.CORBA.TypeCodeHelper;
  44
  45 import org.omg.CORBA.portable.InputStream;
  46 import org.omg.CORBA.portable.OutputStream;
  47
  48 /**
  49  * A helper operations for the union member.
  50  *
  51  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  52  */
  53 public abstract class UnionMemberHelper
  54 {
  55   /**
  56    * The cached typecode value (computed once).
  57    */
  58   private static TypeCode typeCode;
  59
  60   /**
  61    * Used in creating recursive unions.
  62    */
  63   private static boolean active;
  64
  65   /**
  66    * Inset the union member into the given Any.
  67    */
  68   public static void insert(Any a, UnionMember that)
  69   {
  70     OutputStream out = a.create_output_stream();
  71     a.type(type());
  72     write(out, that);
  73     a.read_value(out.create_input_stream(), type());
  74   }
  75
  76   /**
  77    * Extract the union member from the given Any.
  78    */
  79   public static UnionMember extract(Any a)
  80   {
  81     return read(a.create_input_stream());
  82   }
  83
  84   /**
  85    * Create and return the typecode for this union member.
  86    */
  87   public static synchronized TypeCode type()
  88   {
  89     if (typeCode == null)
  90       {
  91         synchronized (TypeCode.class)
  92           {
  93             if (typeCode == null)
  94               {
  95                 if (active)
  96                   {
  97                     return ORB.init().create_recursive_tc(id());
  98                   }
  99                 active = true;
 100
 101                 ORB orb = OrbRestricted.Singleton;
 102
 103                 StructMember[] members = new StructMember[ 4 ];
 104                 TypeCode member;
 105                 member = orb.create_string_tc(0);
 106                 member =
 107                   orb.create_alias_tc(IdentifierHelper.id(), "Identifier",
 108                                       member
 109                                      );
 110                 members [ 0 ] = new StructMember("name", member, null);
 111                 member = orb.get_primitive_tc(TCKind.tk_any);
 112                 members [ 1 ] = new StructMember("label", member, null);
 113                 member = orb.create_string_tc(0);
 114                 member = orb.get_primitive_tc(TCKind.tk_TypeCode);
 115                 members [ 2 ] = new StructMember("type", member, null);
 116                 member = IDLTypeHelper.type();
 117                 members [ 3 ] = new StructMember("type_def", member, null);
 118                 typeCode =
 119                   orb.create_struct_tc(UnionMemberHelper.id(), "UnionMember",
 120                                        members
 121                                       );
 122                 active = false;
 123               }
 124           }
 125       }
 126     return typeCode;
 127   }
 128
 129   /**
 130    * Return the UnionMember repository id.
 131    *
 132    * @return "IDL:omg.org/CORBA/UnionMember:1.0", always.
 133    */
 134   public static String id()
 135   {
 136     return "IDL:omg.org/CORBA/UnionMember:1.0";
 137   }
 138
 139   /**
 140    * Read the union member from the given stream.
 141    */
 142   public static UnionMember read(InputStream istream)
 143   {
 144     try
 145       {
 146         UnionMember value = new UnionMember();
 147         value.name = istream.read_string();
 148         value.label = istream.read_any();
 149         value.type = TypeCodeHelper.read(istream);
 150         value.type_def = IDLTypeHelper.read(istream);
 151         return value;
 152       }
 153     catch (UserException ex)
 154       {
 155         MARSHAL m = new MARSHAL();
 156         m.minor = Minor.UserException;
 157         m.initCause(ex);
 158         throw m;
 159       }
 160   }
 161
 162   /**
 163    * Write the union member to the given stream.
 164    */
 165   public static void write(OutputStream ostream, UnionMember value)
 166   {
 167     try
 168       {
 169         ostream.write_string(value.name);
 170         ostream.write_any(value.label);
 171         TypeCodeHelper.write(ostream, value.type);
 172         IDLTypeHelper.write(ostream, value.type_def);
 173       }
 174     catch (UserException ex)
 175       {
 176         MARSHAL m = new MARSHAL();
 177         m.minor = Minor.UserException;
 178         m.initCause(ex);
 179         throw m;
 180       }
 181   }
 182 }