Source for org.omg.CORBA.IDLTypeHelper

   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:    * Insert the IDL type into the given Any.
  57:    */
  58:   public static void insert(Any a, IDLType that)
  59:   {
  60:     OutputStream out = a.create_output_stream();
  61:     a.type(type());
  62:     write(out, that);
  63:     a.read_value(out.create_input_stream(), type());
  64:   }
  65: 
  66:   /**
  67:    * Extract the IDL type from the given Any.
  68:    */
  69:   public static IDLType extract(Any a)
  70:   {
  71:     return read(a.create_input_stream());
  72:   }
  73: 
  74:   /**
  75:    * Get the typecode of the IDL type (the interface typecode, name "IDLType").
  76:    */
  77:   public static TypeCode type()
  78:   {
  79:     return OrbRestricted.Singleton.create_interface_tc(IDLTypeHelper.id(),
  80:                                                        "IDLType");
  81:   }
  82: 
  83:   /**
  84:    * Return the IDLType repository id.
  85:    *
  86:    * @return "IDL:omg.org/CORBA/IDLType:1.0", always.
  87:    */
  88:   public static String id()
  89:   {
  90:     return "IDL:omg.org/CORBA/IDLType:1.0";
  91:   }
  92: 
  93:   /**
  94:    * Read the IDL type from the given input stream.
  95:    * The method reads an object and narrows into IDL type using this
  96:    * helper.
  97:    */
  98:   public static IDLType read(InputStream istream)
  99:   {
 100:     return narrow(istream.read_Object());
 101:   }
 102: 
 103:   /**
 104:    * Write the IDL type to the output stream (as CORBA object).
 105:    */
 106:   public static void write(OutputStream ostream, IDLType value)
 107:   {
 108:     ostream.write_Object((org.omg.CORBA.Object) value);
 109:   }
 110: 
 111:   /**
 112:    * Narrows the CORBA object into the IDL type.
 113:    */
 114:   public static IDLType narrow(org.omg.CORBA.Object obj)
 115:   {
 116:     if (obj == null)
 117:       return null;
 118:     else if (obj instanceof IDLType)
 119:       return (IDLType) obj;
 120:     else if (!obj._is_a(id()))
 121:       throw new org.omg.CORBA.BAD_PARAM();
 122:     else
 123:       {
 124:         Delegate delegate = ((ObjectImpl) obj)._get_delegate();
 125:         return new _IDLTypeStub(delegate);
 126:       }
 127:   }