001/* DynamicImplementation.java --
002   Copyright (C) 2005, 2006 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.Unexpected;
042import gnu.CORBA.gnuAny;
043import gnu.CORBA.gnuNVList;
044
045import org.omg.CORBA.portable.ObjectImpl;
046import 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 */
059public 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}