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:    * 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:   }