001/* StructMemberHelper.java --
002   Copyright (C) 2005 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package org.omg.CORBA;
040
041import gnu.CORBA.Minor;
042import gnu.CORBA.OrbRestricted;
043import gnu.CORBA.TypeCodeHelper;
044
045import org.omg.CORBA.portable.InputStream;
046import org.omg.CORBA.portable.OutputStream;
047
048/**
049 * Defines a helper operations for StructMember.
050 *
051 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
052 */
053public abstract class StructMemberHelper
054{
055  /**
056   * The cached typecode value, computed once.
057   */
058  private static TypeCode typeCode;
059
060  /**
061   * This flag is used when creating typecodes for the recursive structures.
062   */
063  private static boolean active;
064
065  /**
066   * Insert the structure member into the given Any.
067   */
068  public static void insert(Any a, StructMember 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 structure member from the given Any.
078   */
079  public static StructMember extract(Any a)
080  {
081    return read(a.create_input_stream());
082  }
083
084  /**
085   * Get a typecode for the StructMember.
086   */
087  public static synchronized TypeCode type()
088  {
089    if (typeCode == null)
090      {
091        ORB orb = OrbRestricted.Singleton;
092
093        synchronized (TypeCode.class)
094          {
095            if (typeCode == null)
096              {
097                if (active)
098                  {
099                    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}