001/* NamingContextHelper.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 the naming context. 055 * 056 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 057 */ 058public abstract class NamingContextHelper 059{ 060 /** 061 * The naming context repository id. 062 */ 063 private static String _id = "IDL:omg.org/CosNaming/NamingContext:1.0"; 064 065 /** 066 * Extract the naming context from the given {@link Any}. 067 */ 068 public static NamingContext extract(Any a) 069 { 070 try 071 { 072 return ((NamingContextHolder) a.extract_Streamable()).value; 073 } 074 catch (ClassCastException ex) 075 { 076 BAD_OPERATION bad = new BAD_OPERATION("Naming context expected"); 077 bad.initCause(ex); 078 bad.minor = Minor.Any; 079 throw bad; 080 } 081 } 082 083 /** 084 * Get the {@link NamingContext} repository id. 085 */ 086 public static String id() 087 { 088 return _id; 089 } 090 091 /** 092 * Insert the naming context into the given {@link Any} 093 */ 094 public static void insert(Any a, NamingContext that) 095 { 096 a.insert_Streamable(new NamingContextHolder(that)); 097 } 098 099 /** 100 * Cast the passed object into the NamingContext. If the 101 * object has a different java type, create an instance 102 * of the NamingContext, using the same delegate, as for 103 * the passed parameter. 104 * 105 * If the object repository Id indicates that it is an instance of 106 * {@link NamingContextExt} that is a subclass of the NamingContext, 107 * the functionality is delegated to {@link NamingContextHelper#narrow}. 108 * 109 * @param obj the object to cast. 110 * @return casted instance. 111 * 112 * @throws BAD_PARAM if the passed object is not an instance of 113 * {@link NamingContext} or {@link NamingContextExt}. 114 */ 115 public static NamingContext narrow(org.omg.CORBA.Object obj) 116 { 117 if (obj == null) 118 return null; 119 else if (obj instanceof NamingContext) 120 return (NamingContext) obj; 121 else if (obj._is_a(id())) 122 { 123 Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 124 return new _NamingContextStub(delegate); 125 } 126 else if (obj._is_a(NamingContextExtHelper.id())) 127 return NamingContextExtHelper.narrow(obj); 128 else 129 throw new BAD_PARAM(); 130 } 131 132 /** 133 * Narrow the given object to the NamingContext. No type-checking is performed 134 * to verify that the object actually supports the requested type. The 135 * {@link BAD_OPERATION} will be thrown if unsupported operations are invoked 136 * on the new returned reference, but no failure is expected at the time of 137 * the unchecked_narrow. See OMG issue 4158. 138 * 139 * @param obj the object to cast. 140 * 141 * @return the casted NamingContext. 142 */ 143 public static NamingContext unchecked_narrow(org.omg.CORBA.Object obj) 144 { 145 if (obj == null) 146 return null; 147 else if (obj instanceof NamingContext) 148 return (NamingContext) obj; 149 else 150 { 151 // Do not call the _is_a(..). 152 Delegate delegate = ((ObjectImpl) obj)._get_delegate(); 153 return new _NamingContextStub(delegate); 154 } 155 } 156 157 /** 158 * Read the naming context from the given CDR input stream. 159 */ 160 public static NamingContext read(InputStream istream) 161 { 162 return narrow(istream.read_Object(_NamingContextStub.class)); 163 } 164 165 /** 166 * Get the type code of the {@link NamingContext}. 167 */ 168 public static TypeCode type() 169 { 170 return OrbRestricted.Singleton.create_interface_tc(id(), "NamingContext"); 171 } 172 173 /** 174 * Write the given naming context into the given CDR output stream. 175 */ 176 public static void write(OutputStream ostream, NamingContext value) 177 { 178 ostream.write_Object(value); 179 } 180}