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