001    /* ValueMemberHelper.java --
002       Copyright (C) 2005 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package org.omg.CORBA;
040    
041    import gnu.CORBA.Minor;
042    import gnu.CORBA.OrbRestricted;
043    import gnu.CORBA.TypeCodeHelper;
044    
045    import org.omg.CORBA.portable.InputStream;
046    import org.omg.CORBA.portable.OutputStream;
047    
048    /**
049     * The helper operations for the value member.
050     *
051     * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
052     */
053    public abstract class ValueMemberHelper
054    {
055      /**
056       * The cached typecode value, computed once.
057       */
058      private static TypeCode typeCode = null;
059    
060      /**
061       * Used when creating typecodes with recursive value members.
062       */
063      private static boolean active = false;
064    
065      /**
066       * Insert the value member into the given Any.
067       */
068      public static void insert(Any a, ValueMember that)
069      {
070        OutputStream out = a.create_output_stream();
071        a.type(type());
072        write(out, that);
073        a.read_value(out.create_input_stream(), type());
074      }
075    
076      /**
077       * Extract the value member from the given Any.
078       */
079      public static ValueMember extract(Any a)
080      {
081        return read(a.create_input_stream());
082      }
083    
084      /**
085       * Create a typecode for this value member.
086       */
087      public static synchronized TypeCode type()
088      {
089        if (typeCode == null)
090          {
091            synchronized (TypeCode.class)
092              {
093                if (typeCode == null)
094                  {
095                    ORB orb = OrbRestricted.Singleton;
096    
097                    if (active)
098                      {
099                        return orb.create_recursive_tc(id());
100                      }
101                    active = true;
102    
103                    StructMember[] members = new StructMember[ 7 ];
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.create_string_tc(0);
112                    member =
113                      orb.create_alias_tc(RepositoryIdHelper.id(), "RepositoryId",
114                                          member
115                                         );
116                    members [ 1 ] = new StructMember("id", member, null);
117                    member = orb.create_string_tc(0);
118                    member =
119                      orb.create_alias_tc(RepositoryIdHelper.id(), "RepositoryId",
120                                          member
121                                         );
122                    members [ 2 ] = new StructMember("defined_in", member, null);
123                    member = orb.create_string_tc(0);
124                    member =
125                      orb.create_alias_tc(VersionSpecHelper.id(), "VersionSpec",
126                                          member
127                                         );
128                    members [ 3 ] = new StructMember("version", member, null);
129                    member = orb.create_string_tc(0);
130                    member = orb.get_primitive_tc(TCKind.tk_TypeCode);
131                    members [ 4 ] = new StructMember("type", member, null);
132                    member = IDLTypeHelper.type();
133                    members [ 5 ] = new StructMember("type_def", member, null);
134                    member = orb.get_primitive_tc(TCKind.tk_short);
135                    member =
136                      orb.create_alias_tc(VisibilityHelper.id(), "Visibility",
137                                          member
138                                         );
139                    members [ 6 ] = new StructMember("access", member, null);
140                    typeCode =
141                      orb.create_struct_tc(ValueMemberHelper.id(), "ValueMember",
142                                           members
143                                          );
144                    active = false;
145                  }
146              }
147          }
148        return typeCode;
149      }
150    
151      /**
152       * Return the ValueMember repository id.
153       *
154       * @return "IDL:omg.org/CORBA/ValueMember:1.0", always.
155       */
156      public static String id()
157      {
158        return "IDL:omg.org/CORBA/ValueMember:1.0";
159      }
160    
161      /**
162       * Reads the value member from the given stream.
163       */
164      public static ValueMember read(InputStream istream)
165      {
166        try
167          {
168            ValueMember value = new ValueMember();
169            value.name = istream.read_string();
170            value.id = istream.read_string();
171            value.defined_in = istream.read_string();
172            value.version = istream.read_string();
173            value.type = TypeCodeHelper.read(istream);
174            value.type_def = IDLTypeHelper.read(istream);
175            value.access = istream.read_short();
176            return value;
177          }
178        catch (UserException ex)
179          {
180            MARSHAL m = new MARSHAL();
181            m.minor = Minor.UserException;        
182            m.initCause(ex);
183            throw m;
184          }
185      }
186    
187      /**
188       * Writes the value member to the given stream.
189       */
190      public static void write(OutputStream ostream, ValueMember value)
191      {
192        try
193          {
194            ostream.write_string(value.name);
195            ostream.write_string(value.id);
196            ostream.write_string(value.defined_in);
197            ostream.write_string(value.version);
198            TypeCodeHelper.write(ostream, value.type);
199            IDLTypeHelper.write(ostream, value.type_def);
200            ostream.write_short(value.access);
201          }
202        catch (UserException ex)
203          {
204            MARSHAL m = new MARSHAL();
205            m.minor = Minor.UserException;        
206            m.initCause(ex);
207            throw m;
208          }
209      }
210    }