001 /* BindingIteratorHelper.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.CosNaming;
040
041 import gnu.CORBA.Minor;
042 import gnu.CORBA.OrbRestricted;
043
044 import org.omg.CORBA.Any;
045 import org.omg.CORBA.BAD_OPERATION;
046 import org.omg.CORBA.BAD_PARAM;
047 import org.omg.CORBA.TypeCode;
048 import org.omg.CORBA.portable.Delegate;
049 import org.omg.CORBA.portable.InputStream;
050 import org.omg.CORBA.portable.ObjectImpl;
051 import org.omg.CORBA.portable.OutputStream;
052
053 /**
054 * The helper operations for {@link BindingIterator}
055 *
056 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
057 */
058 public abstract class BindingIteratorHelper
059 {
060 /**
061 * The {@link BindingIterator} repository id.
062 */
063 private static String _id = "IDL:omg.org/CosNaming/BindingIterator:1.0";
064
065 /**
066 * Extract the binding iterator from the given {@link Any}.
067 */
068 public static BindingIterator extract(Any a)
069 {
070 try
071 {
072 return ((BindingIteratorHolder) a.extract_Streamable()).value;
073 }
074 catch (ClassCastException ex)
075 {
076 BAD_OPERATION bad = new BAD_OPERATION("Binding iterator expected");
077 bad.initCause(ex);
078 bad.minor = Minor.Any;
079 throw bad;
080 }
081 }
082
083 /**
084 * Return the binding iterator repository id.
085 */
086 public static String id()
087 {
088 return _id;
089 }
090
091 /**
092 * Insert the binding iterator into the given {@link Any}.
093 */
094 public static void insert(Any a, BindingIterator that)
095 {
096 a.insert_Streamable(new BindingIteratorHolder(that));
097 }
098
099 /**
100 * Narrow the given object to the BindingIterator. The narrowing
101 * means either direct casting or re-instantiating with the same
102 * delegate.
103 *
104 * @param obj the object to cast.
105 *
106 * @return the casted binding iterator.
107 */
108 public static BindingIterator narrow(org.omg.CORBA.Object obj)
109 {
110 if (obj == null)
111 return null;
112 else if (obj instanceof BindingIterator)
113 return (BindingIterator) obj;
114 else if (!obj._is_a(id()))
115 throw new BAD_PARAM();
116 else
117 {
118 Delegate delegate = ((ObjectImpl) obj)._get_delegate();
119 return new _BindingIteratorStub(delegate);
120 }
121 }
122
123 /**
124 * Narrow the given object to the BindingIterator. No type-checking is
125 * performed to verify that the object actually supports the requested type.
126 * The {@link BAD_OPERATION} will be thrown if unsupported operations are
127 * invoked on the new returned reference, but no failure is expected at the
128 * time of the unchecked_narrow. See OMG issue 4158.
129 *
130 * @param obj the object to cast.
131 *
132 * @return the casted binding iterator.
133 *
134 * @since 1.5
135 */
136 public static BindingIterator unchecked_narrow(org.omg.CORBA.Object obj)
137 {
138 if (obj == null)
139 return null;
140 else if (obj instanceof BindingIterator)
141 return (BindingIterator) obj;
142 else
143 {
144 // Do not call the _is_a(..).
145 Delegate delegate = ((ObjectImpl) obj)._get_delegate();
146 return new _BindingIteratorStub(delegate);
147 }
148 }
149
150 /**
151 * Read the exception from the given CDR stream.
152 */
153 public static BindingIterator read(InputStream istream)
154 {
155 return narrow(istream.read_Object(_BindingIteratorStub.class));
156 }
157
158 /**
159 * Create the type code for the BindingIterator.
160 */
161 public static TypeCode type()
162 {
163 return OrbRestricted.Singleton.create_interface_tc(id(), "BindingIterator");
164 }
165
166 /**
167 * Write the exception to the CDR output stream.
168 */
169 public static void write(OutputStream ostream, BindingIterator value)
170 {
171 ostream.write_Object((org.omg.CORBA.Object) value);
172 }
173 }