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

   1 /* StructMemberHelper.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  * Defines a helper operations for StructMember.
  50  *
  51  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  52  */
  53 public abstract class StructMemberHelper
  54 {
  55   /**
  56    * The cached typecode value, computed once.
  57    */
  58   private static TypeCode typeCode;
  59
  60   /**
  61    * This flag is used when creating typecodes for the recursive structures.
  62    */
  63   private static boolean active;
  64
  65   /**
  66    * Insert the structure member into the given Any.
  67    */
  68   public static void insert(Any a, StructMember 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 structure member from the given Any.
  78    */
  79   public static StructMember extract(Any a)
  80   {
  81     return read(a.create_input_stream());
  82   }
  83
  84   /**
  85    * Get a typecode for the StructMember.
  86    */
  87   public static synchronized TypeCode type()
  88   {
  89     if (typeCode == null)
  90       {
  91         ORB orb = OrbRestricted.Singleton;
  92
  93         synchronized (TypeCode.class)
  94           {
  95             if (typeCode == null)
  96               {
  97                 if (active)
  98                   {
  99                     return orb.create_recursive_tc(id());
 100                   }
 101                 active = true;
 102
 103                 StructMember[] members = new StructMember[ 3 ];
 104                 TypeCode member = null;
 105
 106                 member = orb.create_string_tc(0);
 107                 member =
 108                   orb.create_alias_tc(IdentifierHelper.id(), "Identifier",
 109                                       member
 110                                      );
 111                 members [ 0 ] = new StructMember("name", member, null);
 112
 113                 member = orb.get_primitive_tc(TCKind.tk_TypeCode);
 114
 115                 members [ 1 ] = new StructMember("type", member, null);
 116                 members [ 2 ] =
 117                   new StructMember("type_def", IDLTypeHelper.type(), null);
 118                 typeCode =
 119                   orb.create_struct_tc(StructMemberHelper.id(), "StructMember",
 120                                        members
 121                                       );
 122                 active = false;
 123               }
 124           }
 125       }
 126     return typeCode;
 127   }
 128
 129   /**
 130    * Return the StructMember repository id.
 131    *
 132    * @return "IDL:omg.org/CORBA/StructMember:1.0", always.
 133    */
 134   public static String id()
 135   {
 136     return "IDL:omg.org/CORBA/StructMember:1.0";
 137   }
 138
 139   /**
 140    * Read the StructMember from the input stream.
 141    */
 142   public static StructMember read(InputStream istream)
 143   {
 144     try
 145       {
 146         StructMember value = new StructMember();
 147         value.name = istream.read_string();
 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.minor = Minor.UserException;
 156         m.initCause(ex);
 157         throw m;
 158       }
 159   }
 160
 161   /**
 162    * Write the StructMember to the input stream.
 163    */
 164   public static void write(OutputStream ostream, StructMember value)
 165   {
 166     try
 167       {
 168         ostream.write_string(value.name);
 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.minor = Minor.UserException;
 176         m.initCause(ex);
 177         throw m;
 178       }
 179   }
 180 }