001/* BindingIteratorHelper.java -- 002 Copyright (C) 2005, 2006 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.CosNaming; 040 041import gnu.CORBA.Minor; 042import gnu.CORBA.OrbRestricted; 043 044import org.omg.CORBA.Any; 045import org.omg.CORBA.BAD_OPERATION; 046import org.omg.CORBA.BAD_PARAM; 047import org.omg.CORBA.TypeCode; 048import org.omg.CORBA.portable.Delegate; 049import org.omg.CORBA.portable.InputStream; 050import org.omg.CORBA.portable.ObjectImpl; 051import org.omg.CORBA.portable.OutputStream; 052 053/** 054 * The helper operations for {@link BindingIterator} 055 * 056 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 057 */ 058public 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}