001 /* DynUnionHelper.java --
002 Copyright (C) 2005, 2006 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.DynamicAny;
040
041 import gnu.CORBA.OrbRestricted;
042
043 import org.omg.CORBA.BAD_OPERATION;
044 import org.omg.CORBA.BAD_PARAM;
045 import org.omg.CORBA.TypeCode;
046 import org.omg.CORBA.Any;
047 import org.omg.CORBA.portable.InputStream;
048 import org.omg.CORBA.MARSHAL;
049 import org.omg.CORBA.portable.OutputStream;
050
051 /**
052 * The helper operations for {@link DynUnion}. Following the 1.5 JDK
053 * specifications, DynUnion is always a local object, so the two methods of this
054 * helper ({@link #read} and {@link #write} are not in use, always throwing
055 * {@link MARSHAL}.
056 *
057 * @specnote always throwing MARSHAL in read and write ensures compatibility
058 * with other popular implementations like Sun's.
059 *
060 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
061 */
062 public abstract class DynUnionHelper
063 {
064 /**
065 * Cast the passed object into the DynUnion. As DynUnion is a local object,
066 * the method just uses java type cast.
067 *
068 * @param obj the object to narrow.
069 * @return narrowed instance.
070 * @throws BAD_PARAM if the passed object is not a DynUnion.
071 */
072 public static DynUnion narrow(org.omg.CORBA.Object obj)
073 {
074 try
075 {
076 return (DynUnion) obj;
077 }
078 catch (ClassCastException cex)
079 {
080 throw new BAD_PARAM(obj.getClass().getName() + " is not a DynUnion");
081 }
082 }
083
084 /**
085 * Narrow the given object to the DynUnion. For the objects that are
086 * always local, this operation does not differ from the ordinary
087 * {@link #narrow} (ClassCastException will be thrown if narrowing something
088 * different). See OMG issue 4158.
089 *
090 * @param obj the object to cast.
091 *
092 * @return the casted DynUnion.
093 *
094 * @since 1.5
095 */
096 public static DynUnion unchecked_narrow(org.omg.CORBA.Object obj)
097 {
098 return narrow(obj);
099 }
100
101 /**
102 * Get the type code of the {@link DynUnion}.
103 */
104 public static TypeCode type()
105 {
106 return OrbRestricted.Singleton.create_interface_tc(id(), "DynUnion");
107 }
108
109 /**
110 * Insert the DynUnion into the given Any.
111 *
112 * @param any the Any to insert into.
113 *
114 * @param that the DynUnion to insert.
115 */
116 public static void insert(Any any, DynUnion that)
117 {
118 any.insert_Object(that);
119 }
120
121 /**
122 * Extract the DynUnion from given Any.
123 *
124 * @throws BAD_OPERATION if the passed Any does not contain DynUnion.
125 */
126 public static DynUnion extract(Any any)
127 {
128 return narrow(any.extract_Object());
129 }
130
131 /**
132 * Get the DynUnion repository id.
133 *
134 * @return "IDL:omg.org/DynamicAny/DynUnion:1.0", always.
135 */
136 public static String id()
137 {
138 return "IDL:omg.org/DynamicAny/DynUnion:1.0";
139 }
140
141 /**
142 * This should read DynUnion from the CDR input stream, but (following the JDK
143 * 1.5 API) it does not.
144 *
145 * @param input a org.omg.CORBA.portable stream to read from.
146 *
147 * @specenote Sun throws the same exception.
148 *
149 * @throws MARSHAL always.
150 */
151 public static DynUnion read(InputStream input)
152 {
153 throw new MARSHAL(DynAnyFactoryHelper.not_applicable(id()));
154 }
155
156 /**
157 * This should read DynUnion from the CDR input stream, but (following the JDK
158 * 1.5 API) it does not.
159 *
160 * @param output a org.omg.CORBA.portable stream to write into.
161 *
162 * @specenote Sun throws the same exception.
163 *
164 * @throws MARSHAL always.
165 */
166 public static void write(OutputStream output, DynUnion value)
167 {
168 throw new MARSHAL(DynAnyFactoryHelper.not_applicable(id()));
169 }
170 }