old-autovect-branch/libjava/classpath/org/omg/CORBA/IDLTypeHelper.java

   1 /* IDLTypeHelper.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.OrbRestricted;
  42
  43 import org.omg.CORBA.portable.Delegate;
  44 import org.omg.CORBA.portable.InputStream;
  45 import org.omg.CORBA.portable.ObjectImpl;
  46 import org.omg.CORBA.portable.OutputStream;
  47
  48 /**
  49  * A helper operations for the IDL type.
  50  *
  51  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  52  */
  53 public abstract class IDLTypeHelper
  54 {
  55   /**
  56    * The cached typecode value, computed once.
  57    */
  58   private static TypeCode typeCode;
  59
  60   /**
  61    * Insert the IDL type into the given Any.
  62    */
  63   public static void insert(Any a, IDLType that)
  64   {
  65     OutputStream out = a.create_output_stream();
  66     a.type(type());
  67     write(out, that);
  68     a.read_value(out.create_input_stream(), type());
  69   }
  70
  71   /**
  72    * Extract the IDL type from the given Any.
  73    */
  74   public static IDLType extract(Any a)
  75   {
  76     return read(a.create_input_stream());
  77   }
  78
  79   /**
  80    * Get the typecode of the IDL type (the interface typecode, name "IDLType").
  81    */
  82   public static TypeCode type()
  83   {
  84     if (typeCode == null)
  85       {
  86         typeCode =
  87           OrbRestricted.Singleton.create_interface_tc(IDLTypeHelper.id(),
  88                                                        "IDLType"
  89                                                       );
  90       }
  91     return typeCode;
  92   }
  93
  94   /**
  95    * Return the IDLType repository id.
  96    *
  97    * @return "IDL:omg.org/CORBA/IDLType:1.0", always.
  98    */
  99   public static String id()
 100   {
 101     return "IDL:omg.org/CORBA/IDLType:1.0";
 102   }
 103
 104   /**
 105    * Read the IDL type from the given input stream.
 106    * The method reads an object and narrows into IDL type using this
 107    * helper.
 108    */
 109   public static IDLType read(InputStream istream)
 110   {
 111     return narrow(istream.read_Object());
 112   }
 113
 114   /**
 115    * Write the IDL type to the output stream (as CORBA object).
 116    */
 117   public static void write(OutputStream ostream, IDLType value)
 118   {
 119     ostream.write_Object((org.omg.CORBA.Object) value);
 120   }
 121
 122   /**
 123    * Narrows the CORBA object into the IDL type.
 124    */
 125   public static IDLType narrow(org.omg.CORBA.Object obj)
 126   {
 127     if (obj == null)
 128       return null;
 129     else if (obj instanceof IDLType)
 130       return (IDLType) obj;
 131     else if (!obj._is_a(id()))
 132       throw new org.omg.CORBA.BAD_PARAM();
 133     else
 134       {
 135         Delegate delegate = ((ObjectImpl) obj)._get_delegate();
 136         return new _IDLTypeStub(delegate);
 137       }
 138   }
 139 }