Source for org.omg.CORBA.StructMemberHelper

   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:   }