Source for org.omg.CORBA.UnionMemberHelper

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