001/* IDLTypeHelper.java --
002   Copyright (C) 2005 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package org.omg.CORBA;
040
041import gnu.CORBA.OrbRestricted;
042
043import org.omg.CORBA.portable.Delegate;
044import org.omg.CORBA.portable.InputStream;
045import org.omg.CORBA.portable.ObjectImpl;
046import org.omg.CORBA.portable.OutputStream;
047
048/**
049 * A helper operations for the IDL type.
050 *
051 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
052 */
053public abstract class IDLTypeHelper
054{
055  /**
056   * Insert the IDL type into the given Any.
057   */
058  public static void insert(Any a, IDLType that)
059  {
060    OutputStream out = a.create_output_stream();
061    a.type(type());
062    write(out, that);
063    a.read_value(out.create_input_stream(), type());
064  }
065
066  /**
067   * Extract the IDL type from the given Any.
068   */
069  public static IDLType extract(Any a)
070  {
071    return read(a.create_input_stream());
072  }
073
074  /**
075   * Get the typecode of the IDL type (the interface typecode, name "IDLType").
076   */
077  public static TypeCode type()
078  {
079    return OrbRestricted.Singleton.create_interface_tc(IDLTypeHelper.id(),
080                                                       "IDLType");
081  }
082
083  /**
084   * Return the IDLType repository id.
085   *
086   * @return "IDL:omg.org/CORBA/IDLType:1.0", always.
087   */
088  public static String id()
089  {
090    return "IDL:omg.org/CORBA/IDLType:1.0";
091  }
092
093  /**
094   * Read the IDL type from the given input stream.
095   * The method reads an object and narrows into IDL type using this
096   * helper.
097   */
098  public static IDLType read(InputStream istream)
099  {
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  }
128}