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1: /* ServiceContextHelper.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.IOP; 40: 41: import gnu.CORBA.Minor; 42: 43: import org.omg.CORBA.Any; 44: import org.omg.CORBA.BAD_OPERATION; 45: import org.omg.CORBA.ORB; 46: import org.omg.CORBA.StructMember; 47: import org.omg.CORBA.TCKind; 48: import org.omg.CORBA.TypeCode; 49: import org.omg.CORBA.portable.InputStream; 50: import org.omg.CORBA.portable.OutputStream; 51: 52: /** 53: * A helper operations for the structure {@link ServiceContext}. 54: * 55: * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 56: */ 57: public abstract class ServiceContextHelper 58: { 59: /** 60: * The cached typecode value, computed only once. 61: */ 62: private static TypeCode typeCode; 63: 64: /** 65: * Create the ServiceContext typecode (structure, 66: * named "ServiceContext"). 67: * The typecode states that the structure contains the 68: * following fields: context_id, context_data. 69: */ 70: public static TypeCode type() 71: { 72: if (typeCode == null) 73: { 74: ORB orb = ORB.init(); 75: StructMember[] members = new StructMember[ 2 ]; 76: 77: TypeCode field; 78: 79: field = 80: orb.create_alias_tc("IDL:omg.org/IOP/ServiceId:1.0", "ServiceId", 81: orb.get_primitive_tc(TCKind.tk_ulong) 82: ); 83: members [ 0 ] = new StructMember("context_id", field, null); 84: 85: field = 86: orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet)); 87: members [ 1 ] = new StructMember("context_data", field, null); 88: typeCode = orb.create_struct_tc(id(), "ServiceContext", members); 89: } 90: return typeCode; 91: } 92: 93: /** 94: * Insert the ServiceContext into the given Any. 95: * This method uses the ServiceContextHolder. 96: * 97: * @param any the Any to insert into. 98: * @param that the ServiceContext to insert. 99: */ 100: public static void insert(Any any, ServiceContext that) 101: { 102: any.insert_Streamable(new ServiceContextHolder(that)); 103: } 104: 105: /** 106: * Extract the ServiceContext from given Any. 107: * This method uses the ServiceContextHolder. 108: * 109: * @throws BAD_OPERATION if the passed Any does not contain ServiceContext. 110: */ 111: public static ServiceContext extract(Any any) 112: { 113: try 114: { 115: return ((ServiceContextHolder) any.extract_Streamable()).value; 116: } 117: catch (ClassCastException cex) 118: { 119: BAD_OPERATION bad = new BAD_OPERATION("ServiceContext expected"); 120: bad.minor = Minor.Any; 121: bad.initCause(cex); 122: throw bad; 123: } 124: } 125: 126: /** 127: * Get the ServiceContext repository id. 128: * 129: * @return "IDL:omg.org/IOP/ServiceContext:1.0", always. 130: */ 131: public static String id() 132: { 133: return "IDL:omg.org/IOP/ServiceContext:1.0"; 134: } 135: 136: /** 137: * Read the context from the CDR intput stream (first id, then 138: * data as a flexible length byte sequence). 139: * 140: * @param input a org.omg.CORBA.portable stream to read from. 141: */ 142: public static ServiceContext read(InputStream input) 143: { 144: ServiceContext value = new ServiceContext(); 145: value.context_id = input.read_long(); 146: value.context_data = new byte[ input.read_long() ]; 147: for (int i0 = 0; i0 < value.context_data.length; i0++) 148: value.context_data [ i0 ] = input.read_octet(); 149: return value; 150: } 151: 152: /** 153: * Write the context to the CDR output stream (first id, then 154: * data as a flexible length byte sequence). 155: * 156: * @param output a org.omg.CORBA.portable stream stream to write into. 157: * @param value a value to write. 158: */ 159: public static void write(OutputStream output, ServiceContext value) 160: { 161: output.write_long(value.context_id); 162: output.write_long(value.context_data.length); 163: for (int i0 = 0; i0 < value.context_data.length; i0++) 164: output.write_octet(value.context_data [ i0 ]); 165: }
GNU Classpath (0.20) |