001 /* ServiceContextHelper.java -- 002 Copyright (C) 2005 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.IOP; 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.ORB; 047 import org.omg.CORBA.StructMember; 048 import org.omg.CORBA.TCKind; 049 import org.omg.CORBA.TypeCode; 050 import org.omg.CORBA.portable.InputStream; 051 import org.omg.CORBA.portable.OutputStream; 052 053 /** 054 * A helper operations for the structure {@link ServiceContext}. 055 * 056 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 057 */ 058 public abstract class ServiceContextHelper 059 { 060 /** 061 * Create the ServiceContext typecode (structure, named "ServiceContext"). The 062 * typecode states that the structure contains the following fields: 063 * context_id, context_data. 064 */ 065 public static TypeCode type() 066 { 067 ORB orb = OrbRestricted.Singleton; 068 StructMember[] members = new StructMember[2]; 069 070 TypeCode field; 071 072 field = orb.create_alias_tc("IDL:omg.org/IOP/ServiceId:1.0", "ServiceId", 073 orb.get_primitive_tc(TCKind.tk_ulong)); 074 members[0] = new StructMember("context_id", field, null); 075 076 field = orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet)); 077 members[1] = new StructMember("context_data", field, null); 078 return orb.create_struct_tc(id(), "ServiceContext", members); 079 } 080 081 /** 082 * Insert the ServiceContext into the given Any. This method uses the 083 * ServiceContextHolder. 084 * 085 * @param any the Any to insert into. 086 * @param that the ServiceContext to insert. 087 */ 088 public static void insert(Any any, ServiceContext that) 089 { 090 any.insert_Streamable(new ServiceContextHolder(that)); 091 } 092 093 /** 094 * Extract the ServiceContext from given Any. 095 * This method uses the ServiceContextHolder. 096 * 097 * @throws BAD_OPERATION if the passed Any does not contain ServiceContext. 098 */ 099 public static ServiceContext extract(Any any) 100 { 101 try 102 { 103 return ((ServiceContextHolder) any.extract_Streamable()).value; 104 } 105 catch (ClassCastException cex) 106 { 107 BAD_OPERATION bad = new BAD_OPERATION("ServiceContext expected"); 108 bad.minor = Minor.Any; 109 bad.initCause(cex); 110 throw bad; 111 } 112 } 113 114 /** 115 * Get the ServiceContext repository id. 116 * 117 * @return "IDL:omg.org/IOP/ServiceContext:1.0", always. 118 */ 119 public static String id() 120 { 121 return "IDL:omg.org/IOP/ServiceContext:1.0"; 122 } 123 124 /** 125 * Read the context from the CDR intput stream (first id, then 126 * data as a flexible length byte sequence). 127 * 128 * @param input a org.omg.CORBA.portable stream to read from. 129 */ 130 public static ServiceContext read(InputStream input) 131 { 132 ServiceContext value = new ServiceContext(); 133 value.context_id = input.read_long(); 134 value.context_data = new byte[ input.read_long() ]; 135 for (int i0 = 0; i0 < value.context_data.length; i0++) 136 value.context_data [ i0 ] = input.read_octet(); 137 return value; 138 } 139 140 /** 141 * Write the context to the CDR output stream (first id, then 142 * data as a flexible length byte sequence). 143 * 144 * @param output a org.omg.CORBA.portable stream stream to write into. 145 * @param value a value to write. 146 */ 147 public static void write(OutputStream output, ServiceContext value) 148 { 149 output.write_long(value.context_id); 150 output.write_long(value.context_data.length); 151 for (int i0 = 0; i0 < value.context_data.length; i0++) 152 output.write_octet(value.context_data [ i0 ]); 153 } 154 }