001    /* CurrentHelper.java --
002       Copyright (C) 2005, 2006 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package org.omg.CORBA;
040    
041    import gnu.CORBA.OrbRestricted;
042    
043    import org.omg.CORBA.Any;
044    import org.omg.CORBA.BAD_OPERATION;
045    import org.omg.CORBA.TypeCode;
046    import org.omg.CORBA.portable.Delegate;
047    import org.omg.CORBA.portable.InputStream;
048    import org.omg.CORBA.portable.ObjectImpl;
049    import org.omg.CORBA.portable.OutputStream;
050    
051    /**
052    * The helper operations for the CORBA object {@link Current}.
053    *
054    * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
055    */
056    public abstract class CurrentHelper
057    {
058      /**
059       * The Current stub (proxy), used on the client side.
060       * The {@link Current} methods should contain the code for remote
061       * invocaton. As there are no methods defined, this class is only
062       * used for the formal support of the
063       * {@link #narrow(org.omg.CORBA.Object)}.
064       */
065      private static class _CurrentStub
066        extends ObjectImpl
067        implements Current
068      {
069        /**
070         * Create the naming context stub with the given delegate.
071         */
072        public _CurrentStub(Delegate delegate)
073        {
074          _set_delegate(delegate);
075        }
076    
077        /**
078         * Return the array of repository ids for this object.
079         */
080        public String[] _ids()
081        {
082          return new String[] { id() };
083        }
084      }
085    
086      /**
087       * Get the type code of the {@link Current}.
088       */
089      public static TypeCode type()
090      {
091        return
092          OrbRestricted.Singleton.create_interface_tc(id(), "Current");
093      }
094    
095      /**
096       * Insert the Current into the given Any.
097       *
098       * @param any the Any to insert into.
099       * @param that the Current to insert.
100       */
101      public static void insert(Any any, Current that)
102      {
103        any.insert_Object(that);
104      }
105    
106      /**
107       * Extract the Current from given Any.
108       *
109       * @throws BAD_OPERATION if the passed Any does not contain Current.
110       */
111      public static Current extract(Any any)
112      {
113        return narrow(any.extract_Object());
114      }
115    
116      /**
117       * Get the Current repository id.
118       *
119       * @return "IDL:omg.org/CORBA/Current:1.0", always.
120       */
121      public static String id()
122      {
123        return "IDL:omg.org/CORBA/Current:1.0";
124      }
125    
126      /**
127       * Cast the passed object into the Current. If the
128       * object has a different java type, create an instance
129       * of the _CurrentStub, using the same delegate, as for
130       * the passed parameter. Hence, unlike java type cast,
131       * this method may return a different object, than has been passed.
132       *
133       * @param obj the object to narrow.
134       * @return narrowed instance.
135       *
136       * @throws BAD_PARAM if the passed object is not a Current.
137       */
138      public static Current narrow(org.omg.CORBA.Object obj)
139      {
140        if (obj == null)
141          return null;
142        else if (obj instanceof Current)
143          return (Current) obj;
144        else if (!obj._is_a(id()))
145          throw new BAD_PARAM("Not a Current");
146        else
147          {
148            Delegate delegate = ((ObjectImpl) obj)._get_delegate();
149            return new _CurrentStub(delegate);
150          }
151      }
152    
153      /**
154       * Read the Current from the CDR intput stream (IOR profile expected).
155       *
156       * @param input a org.omg.CORBA.portable stream to read from.
157       */
158      public static Current read(InputStream input)
159      {
160        return narrow(input.read_Object());
161      }
162    
163      /**
164       * Write the Current to the CDR output stream (as IOR profile).
165       *
166       * @param output a org.omg.CORBA.portable stream stream to write into.
167       * @param value a value to write.
168       */
169      public static void write(OutputStream output, Current value)
170      {
171        output.write_Object(value);
172      }
173    }