001    /* DynamicImplementation.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.Unexpected;
042    import gnu.CORBA.gnuAny;
043    import gnu.CORBA.gnuNVList;
044    
045    import org.omg.CORBA.portable.ObjectImpl;
046    import org.omg.CORBA.portable.OutputStream;
047    
048    /**
049     * This class was probably originally thinked as a base of all CORBA
050     * object implementations. However the code, generated by IDL to
051     * java compilers almost never use it, preferring to derive the
052     * object implementation bases directly from the {@link ObjectImpl}.
053     * The class has become deprecated since the 1.4 release.
054     *
055     * @deprecated since 1.4.
056     *
057     * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
058     */
059    public class DynamicImplementation
060      extends ObjectImpl
061    {
062      /**
063       * Invoke the method of the CORBA object. After converting the parameters,
064       * this method delegates call to the {@link ObjectImpl#_invoke}.
065       *
066       * @deprecated since 1.4.
067       *
068       * @param request the container for both passing and returing the parameters,
069       * also contains the method name and thrown exceptions.
070       */
071      public void invoke(ServerRequest request)
072      {
073        Request r = _request(request.operation());
074    
075        // Copy the parameters.
076        NVList args = new gnuNVList();
077        request.arguments(args);
078        NamedValue v;
079        int i = 0;
080    
081        try
082          {
083            // Set the arguments.
084            for (i = 0; i < args.count(); i++)
085              {
086                v = args.item(i);
087                Any n;
088                OutputStream out;
089    
090                switch (v.flags())
091                  {
092                    case ARG_IN.value:
093                      out = v.value().create_output_stream();
094                      v.value().write_value(out);
095                      n = r.add_named_in_arg(v.name());
096                      n.read_value(out.create_input_stream(), v.value().type());
097                      break;
098                    case ARG_INOUT.value:
099                      out = v.value().create_output_stream();
100                      v.value().write_value(out);
101                      n = r.add_named_inout_arg(v.name());
102                      n.read_value(out.create_input_stream(), v.value().type());
103                      break;
104                    case ARG_OUT.value:
105                      r.add_named_out_arg(v.name());
106                      break;
107    
108                    default:
109                      throw new InternalError("Invalid flags " + v.flags());
110                  }
111              }
112          }
113        catch (Bounds b)
114          {
115            throw new Unexpected(args.count() + "[" + i + "]", b);
116          }
117    
118        // Set context.
119        r.ctx(request.ctx());
120    
121        // Set the return type (expects that the ServerRequest will initialise
122        // the passed Any.
123    
124        gnuAny g = new gnuAny();
125        request.result(g);
126        r.set_return_type(g.type());
127    
128        // Invoke the method.
129        r.invoke();
130    
131        // Transfer the returned values.
132        NVList r_args = r.arguments();
133    
134        try
135          {
136            // API states that the ServerRequest.arguments must be called only
137            // once. Hence we assume we can just modify the previously returned
138            // value <code>args</code>, and the ServerRequest will preserve the
139            // reference.
140            for (i = 0; i < args.count(); i++)
141              {
142                v = args.item(i);
143    
144                if (v.flags() == ARG_OUT.value || v.flags() == ARG_INOUT.value)
145                  {
146                    OutputStream out = r_args.item(i).value().create_output_stream();
147                    r_args.item(i).value().write_value(out);
148                    v.value().read_value(out.create_input_stream(),
149                      v.value().type());
150                  }
151              }
152          }
153        catch (Bounds b)
154          {
155            throw new Unexpected(args.count() + "[" + i + "]", b);
156          }
157    
158        // Set the returned result (if any).
159        NamedValue returns = r.result();
160        if (returns != null)
161          request.set_result(returns.value());
162      }
163    
164      /**
165       * Returns the array of the repository ids, supported by this object.
166       * In this implementation, the method must be overrridden to return
167       * a sendible object-specific information. The default method returns
168       * an empty array.
169       *
170       * @deprecated since 1.4.
171       *
172       * @return the empty array, always.
173       */
174      public String[] _ids()
175      {
176        return new String[ 0 ];
177      }
178    }