Source for org.omg.IOP.ServiceContextHelper

   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: import gnu.CORBA.OrbRestricted;
  43: 
  44: import org.omg.CORBA.Any;
  45: import org.omg.CORBA.BAD_OPERATION;
  46: import org.omg.CORBA.ORB;
  47: import org.omg.CORBA.StructMember;
  48: import org.omg.CORBA.TCKind;
  49: import org.omg.CORBA.TypeCode;
  50: import org.omg.CORBA.portable.InputStream;
  51: import org.omg.CORBA.portable.OutputStream;
  52: 
  53: /**
  54: * A helper operations for the structure {@link ServiceContext}.
  55: *
  56: * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  57: */
  58: public abstract class ServiceContextHelper
  59: {
  60:   /**
  61:    * Create the ServiceContext typecode (structure, named "ServiceContext"). The
  62:    * typecode states that the structure contains the following fields:
  63:    * context_id, context_data.
  64:    */
  65:   public static TypeCode type()
  66:   {
  67:     ORB orb = OrbRestricted.Singleton;
  68:     StructMember[] members = new StructMember[2];
  69: 
  70:     TypeCode field;
  71: 
  72:     field = orb.create_alias_tc("IDL:omg.org/IOP/ServiceId:1.0", "ServiceId",
  73:                                 orb.get_primitive_tc(TCKind.tk_ulong));
  74:     members[0] = new StructMember("context_id", field, null);
  75: 
  76:     field = orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet));
  77:     members[1] = new StructMember("context_data", field, null);
  78:     return orb.create_struct_tc(id(), "ServiceContext", members);
  79:   }
  80: 
  81:   /**
  82:    * Insert the ServiceContext into the given Any. This method uses the
  83:    * ServiceContextHolder.
  84:    * 
  85:    * @param any the Any to insert into.
  86:    * @param that the ServiceContext to insert.
  87:    */
  88:   public static void insert(Any any, ServiceContext that)
  89:   {
  90:     any.insert_Streamable(new ServiceContextHolder(that));
  91:   }
  92: 
  93:   /**
  94:    * Extract the ServiceContext from given Any.
  95:    * This method uses the ServiceContextHolder.
  96:    *
  97:    * @throws BAD_OPERATION if the passed Any does not contain ServiceContext.
  98:    */
  99:   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:   }