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 }