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.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 OrbRestricted.Singleton.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:   }