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.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:   }