001 /* CurrentHelper.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.CORBA;
040
041 import gnu.CORBA.OrbRestricted;
042
043 import org.omg.CORBA.Any;
044 import org.omg.CORBA.BAD_OPERATION;
045 import org.omg.CORBA.TypeCode;
046 import org.omg.CORBA.portable.Delegate;
047 import org.omg.CORBA.portable.InputStream;
048 import org.omg.CORBA.portable.ObjectImpl;
049 import org.omg.CORBA.portable.OutputStream;
050
051 /**
052 * The helper operations for the CORBA object {@link Current}.
053 *
054 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
055 */
056 public abstract class CurrentHelper
057 {
058 /**
059 * The Current stub (proxy), used on the client side.
060 * The {@link Current} methods should contain the code for remote
061 * invocaton. As there are no methods defined, this class is only
062 * used for the formal support of the
063 * {@link #narrow(org.omg.CORBA.Object)}.
064 */
065 private static class _CurrentStub
066 extends ObjectImpl
067 implements Current
068 {
069 /**
070 * Create the naming context stub with the given delegate.
071 */
072 public _CurrentStub(Delegate delegate)
073 {
074 _set_delegate(delegate);
075 }
076
077 /**
078 * Return the array of repository ids for this object.
079 */
080 public String[] _ids()
081 {
082 return new String[] { id() };
083 }
084 }
085
086 /**
087 * Get the type code of the {@link Current}.
088 */
089 public static TypeCode type()
090 {
091 return
092 OrbRestricted.Singleton.create_interface_tc(id(), "Current");
093 }
094
095 /**
096 * Insert the Current into the given Any.
097 *
098 * @param any the Any to insert into.
099 * @param that the Current to insert.
100 */
101 public static void insert(Any any, Current that)
102 {
103 any.insert_Object(that);
104 }
105
106 /**
107 * Extract the Current from given Any.
108 *
109 * @throws BAD_OPERATION if the passed Any does not contain Current.
110 */
111 public static Current extract(Any any)
112 {
113 return narrow(any.extract_Object());
114 }
115
116 /**
117 * Get the Current repository id.
118 *
119 * @return "IDL:omg.org/CORBA/Current:1.0", always.
120 */
121 public static String id()
122 {
123 return "IDL:omg.org/CORBA/Current:1.0";
124 }
125
126 /**
127 * Cast the passed object into the Current. If the
128 * object has a different java type, create an instance
129 * of the _CurrentStub, using the same delegate, as for
130 * the passed parameter. Hence, unlike java type cast,
131 * this method may return a different object, than has been passed.
132 *
133 * @param obj the object to narrow.
134 * @return narrowed instance.
135 *
136 * @throws BAD_PARAM if the passed object is not a Current.
137 */
138 public static Current narrow(org.omg.CORBA.Object obj)
139 {
140 if (obj == null)
141 return null;
142 else if (obj instanceof Current)
143 return (Current) obj;
144 else if (!obj._is_a(id()))
145 throw new BAD_PARAM("Not a Current");
146 else
147 {
148 Delegate delegate = ((ObjectImpl) obj)._get_delegate();
149 return new _CurrentStub(delegate);
150 }
151 }
152
153 /**
154 * Read the Current from the CDR intput stream (IOR profile expected).
155 *
156 * @param input a org.omg.CORBA.portable stream to read from.
157 */
158 public static Current read(InputStream input)
159 {
160 return narrow(input.read_Object());
161 }
162
163 /**
164 * Write the Current to the CDR output stream (as IOR profile).
165 *
166 * @param output a org.omg.CORBA.portable stream stream to write into.
167 * @param value a value to write.
168 */
169 public static void write(OutputStream output, Current value)
170 {
171 output.write_Object(value);
172 }
173 }