1 /* UnionMemberHelper.java -- 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package org.omg.CORBA; 40 41 import gnu.CORBA.Minor; 42 import gnu.CORBA.OrbRestricted; 43 import gnu.CORBA.TypeCodeHelper; 44 45 import org.omg.CORBA.portable.InputStream; 46 import org.omg.CORBA.portable.OutputStream; 47 48 /** 49 * A helper operations for the union member. 50 * 51 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 52 */ 53 public abstract class UnionMemberHelper 54 { 55 /** 56 * The cached typecode value (computed once). 57 */ 58 private static TypeCode typeCode; 59 60 /** 61 * Used in creating recursive unions. 62 */ 63 private static boolean active; 64 65 /** 66 * Inset the union member into the given Any. 67 */ insert(Any a, UnionMember that)68 public static void insert(Any a, UnionMember that) 69 { 70 OutputStream out = a.create_output_stream(); 71 a.type(type()); 72 write(out, that); 73 a.read_value(out.create_input_stream(), type()); 74 } 75 76 /** 77 * Extract the union member from the given Any. 78 */ extract(Any a)79 public static UnionMember extract(Any a) 80 { 81 return read(a.create_input_stream()); 82 } 83 84 /** 85 * Create and return the typecode for this union member. 86 */ type()87 public static synchronized TypeCode type() 88 { 89 if (typeCode == null) 90 { 91 synchronized (TypeCode.class) 92 { 93 if (typeCode == null) 94 { 95 if (active) 96 { 97 return OrbRestricted.Singleton.create_recursive_tc(id()); 98 } 99 active = true; 100 101 ORB orb = OrbRestricted.Singleton; 102 103 StructMember[] members = new StructMember[ 4 ]; 104 TypeCode member; 105 member = orb.create_string_tc(0); 106 member = 107 orb.create_alias_tc(IdentifierHelper.id(), "Identifier", 108 member 109 ); 110 members [ 0 ] = new StructMember("name", member, null); 111 member = orb.get_primitive_tc(TCKind.tk_any); 112 members [ 1 ] = new StructMember("label", member, null); 113 member = orb.create_string_tc(0); 114 member = orb.get_primitive_tc(TCKind.tk_TypeCode); 115 members [ 2 ] = new StructMember("type", member, null); 116 member = IDLTypeHelper.type(); 117 members [ 3 ] = new StructMember("type_def", member, null); 118 typeCode = 119 orb.create_struct_tc(UnionMemberHelper.id(), "UnionMember", 120 members 121 ); 122 active = false; 123 } 124 } 125 } 126 return typeCode; 127 } 128 129 /** 130 * Return the UnionMember repository id. 131 * 132 * @return "IDL:omg.org/CORBA/UnionMember:1.0", always. 133 */ id()134 public static String id() 135 { 136 return "IDL:omg.org/CORBA/UnionMember:1.0"; 137 } 138 139 /** 140 * Read the union member from the given stream. 141 */ read(InputStream istream)142 public static UnionMember read(InputStream istream) 143 { 144 try 145 { 146 UnionMember value = new UnionMember(); 147 value.name = istream.read_string(); 148 value.label = istream.read_any(); 149 value.type = TypeCodeHelper.read(istream); 150 value.type_def = IDLTypeHelper.read(istream); 151 return value; 152 } 153 catch (UserException ex) 154 { 155 MARSHAL m = new MARSHAL(); 156 m.minor = Minor.UserException; 157 m.initCause(ex); 158 throw m; 159 } 160 } 161 162 /** 163 * Write the union member to the given stream. 164 */ write(OutputStream ostream, UnionMember value)165 public static void write(OutputStream ostream, UnionMember value) 166 { 167 try 168 { 169 ostream.write_string(value.name); 170 ostream.write_any(value.label); 171 TypeCodeHelper.write(ostream, value.type); 172 IDLTypeHelper.write(ostream, value.type_def); 173 } 174 catch (UserException ex) 175 { 176 MARSHAL m = new MARSHAL(); 177 m.minor = Minor.UserException; 178 m.initCause(ex); 179 throw m; 180 } 181 } 182 } 183