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 }