Source for org.omg.CORBA.ServiceDetailHelper

   1: /* ServiceDetailHelper.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 org.omg.CORBA.portable.InputStream;
  42: import org.omg.CORBA.portable.OutputStream;
  43: import gnu.CORBA.*;
  44: 
  45: /**
  46:  * The helper operations on the Service Detail.
  47:  *
  48:  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  49:  */
  50: public abstract class ServiceDetailHelper
  51: {
  52:   /**
  53:    * The service detail repository id.
  54:    */
  55:   private static String _id = "IDL:omg.org/CORBA/ServiceDetail:1.0";
  56: 
  57:   /**
  58:    * The cached typecode value, computed once.
  59:    */
  60:   private static TypeCode typeCode;
  61: 
  62:   /**
  63:    * Extract the service detail info from the given {@link Any}
  64:    *
  65:    * @param a the Any to extract from.
  66:    *
  67:    * @return the extracted detail.
  68:    *
  69:    * @throws BAD_OPERATION if the parameter holds something different
  70:    * from the ServiceDetail.
  71:    */
  72:   public static ServiceDetail extract(Any a)
  73:   {
  74:     try
  75:       {
  76:         return ((ServiceDetailHolder) a.extract_Streamable()).value;
  77:       }
  78:     catch (ClassCastException ex)
  79:       {
  80:         throw new BAD_OPERATION();
  81:       }
  82:   }
  83: 
  84:   /**
  85:    * Get the service detail repository id.
  86:    *
  87:    * @return the service detail repository id,
  88:    * <code>IDL:omg.org/CORBA/ServiceDetail:1.0</code>, always.
  89:    */
  90:   public static String id()
  91:   {
  92:     return _id;
  93:   }
  94: 
  95:   /**
  96:    * Insert the service detail into the given {@link Any}.
  97:    *
  98:    * @param a the Any to insert into.
  99:    *
 100:    * @param that the detail to insert.
 101:    */
 102:   public static void insert(Any a, ServiceDetail that)
 103:   {
 104:     a.insert_Streamable(new ServiceDetailHolder(that));
 105:   }
 106: 
 107:   /**
 108:    * Read the service detail information from the given CDR
 109:    * intput stream. First reads the type, then the flexible
 110:    * length byte sequence.
 111:    *
 112:    * @param istream a stram to read from.
 113:    *
 114:    * @return the loaded service detail.
 115:    */
 116:   public static ServiceDetail read(InputStream istream)
 117:   {
 118:     ServiceDetail value = new ServiceDetail();
 119:     value.service_detail_type = istream.read_ulong();
 120: 
 121:     int l = istream.read_long();
 122:     value.service_detail = new byte[ l ];
 123:     istream.read_octet_array(value.service_detail, 0, l);
 124:     return value;
 125:   }
 126: 
 127:   /**
 128:    * Get the typecode of the service detail, assuming to be it
 129:    * a structure with the two fields.
 130:    *
 131:    * @return the newly created or cached typecode value.
 132:    */
 133:   public static TypeCode type()
 134:   {
 135:     if (typeCode == null)
 136:       {
 137:         ORB orb = ORB.init();
 138: 
 139:         StructMember[] members = new StructMember[ 2 ];
 140: 
 141:         TypeCode type =
 142:           orb.create_alias_tc(_id, "ServiceDetailType",
 143:                               orb.get_primitive_tc(TCKind.tk_ulong)
 144:                              );
 145:         members [ 0 ] = new StructMember("service_detail_type", type, null);
 146: 
 147:         TypeCode data =
 148:           orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet));
 149:         members [ 1 ] = new StructMember("service_detail", data, null);
 150: 
 151:         typeCode = orb.create_struct_tc(id(), "ServiceDetail", members);
 152:       }
 153:     return typeCode;
 154:   }
 155: 
 156:   /**
 157:    * Write the service detail data to the given CDR output stream.
 158:    * Writes the detail type first, then the detail type data
 159:    * as the variable length byte sequence.
 160:    *
 161:    * @param ostream a stream to write into.
 162:    * @param value a value to write.
 163:    */
 164:   public static void write(OutputStream ostream, ServiceDetail value)
 165:   {
 166:     ostream.write_ulong(value.service_detail_type);
 167:     ostream.write_long(value.service_detail.length);
 168:     ostream.write_octet_array(value.service_detail, 0,
 169:                               value.service_detail.length
 170:                              );
 171:   }
 172: }