001 /* StructMemberHelper.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 * Defines a helper operations for StructMember.
050 *
051 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
052 */
053 public 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 }