libjava/classpath/org/omg/CORBA/ServiceDetailHelper.java

   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.Minor;
  42 import gnu.CORBA.ServiceDetailHolder;
  43
  44 import org.omg.CORBA.portable.InputStream;
  45 import org.omg.CORBA.portable.OutputStream;
  46
  47 /**
  48  * The helper operations on the Service Detail.
  49  *
  50  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  51  */
  52 public abstract class ServiceDetailHelper
  53 {
  54   /**
  55    * The service detail repository id.
  56    */
  57   private static String _id = "IDL:omg.org/CORBA/ServiceDetail:1.0";
  58
  59   /**
  60    * The cached typecode value, computed once.
  61    */
  62   private static TypeCode typeCode;
  63
  64   /**
  65    * Extract the service detail info from the given {@link Any}
  66    *
  67    * @param a the Any to extract from.
  68    *
  69    * @return the extracted detail.
  70    *
  71    * @throws BAD_OPERATION if the parameter holds something different
  72    * from the ServiceDetail.
  73    */
  74   public static ServiceDetail extract(Any a)
  75   {
  76     try
  77       {
  78         return ((ServiceDetailHolder) a.extract_Streamable()).value;
  79       }
  80     catch (ClassCastException ex)
  81       {
  82         BAD_OPERATION bad = new BAD_OPERATION();
  83         bad.initCause(ex);
  84         bad.minor = Minor.Any;
  85         throw bad;
  86       }
  87   }
  88
  89   /**
  90    * Get the service detail repository id.
  91    *
  92    * @return the service detail repository id,
  93    * <code>IDL:omg.org/CORBA/ServiceDetail:1.0</code>, always.
  94    */
  95   public static String id()
  96   {
  97     return _id;
  98   }
  99
 100   /**
 101    * Insert the service detail into the given {@link Any}.
 102    *
 103    * @param a the Any to insert into.
 104    *
 105    * @param that the detail to insert.
 106    */
 107   public static void insert(Any a, ServiceDetail that)
 108   {
 109     a.insert_Streamable(new ServiceDetailHolder(that));
 110   }
 111
 112   /**
 113    * Read the service detail information from the given CDR
 114    * intput stream. First reads the type, then the flexible
 115    * length byte sequence.
 116    *
 117    * @param istream a stram to read from.
 118    *
 119    * @return the loaded service detail.
 120    */
 121   public static ServiceDetail read(InputStream istream)
 122   {
 123     ServiceDetail value = new ServiceDetail();
 124     value.service_detail_type = istream.read_ulong();
 125
 126     int l = istream.read_long();
 127     value.service_detail = new byte[ l ];
 128     istream.read_octet_array(value.service_detail, 0, l);
 129     return value;
 130   }
 131
 132   /**
 133    * Get the typecode of the service detail, assuming to be it
 134    * a structure with the two fields.
 135    *
 136    * @return the newly created or cached typecode value.
 137    */
 138   public static TypeCode type()
 139   {
 140     if (typeCode == null)
 141       {
 142         ORB orb = ORB.init();
 143
 144         StructMember[] members = new StructMember[ 2 ];
 145
 146         TypeCode type =
 147           orb.create_alias_tc(_id, "ServiceDetailType",
 148             orb.get_primitive_tc(TCKind.tk_ulong)
 149           );
 150         members [ 0 ] = new StructMember("service_detail_type", type, null);
 151
 152         TypeCode data =
 153           orb.create_sequence_tc(0, orb.get_primitive_tc(TCKind.tk_octet));
 154         members [ 1 ] = new StructMember("service_detail", data, null);
 155
 156         typeCode = orb.create_struct_tc(id(), "ServiceDetail", members);
 157       }
 158     return typeCode;
 159   }
 160
 161   /**
 162    * Write the service detail data to the given CDR output stream.
 163    * Writes the detail type first, then the detail type data
 164    * as the variable length byte sequence.
 165    *
 166    * @param ostream a stream to write into.
 167    * @param value a value to write.
 168    */
 169   public static void write(OutputStream ostream, ServiceDetail value)
 170   {
 171     ostream.write_ulong(value.service_detail_type);
 172     ostream.write_long(value.service_detail.length);
 173     ostream.write_octet_array(value.service_detail, 0,
 174       value.service_detail.length
 175     );
 176   }
 177 }