001    /* _BindingIteratorImplBase.java --
002       Copyright (C) 2005 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.CosNaming;
040    
041    import gnu.CORBA.Minor;
042    
043    import org.omg.CORBA.BAD_OPERATION;
044    import org.omg.CORBA.BooleanHolder;
045    import org.omg.CORBA.CompletionStatus;
046    import org.omg.CORBA.DynamicImplementation;
047    import org.omg.CORBA.ServerRequest;
048    import org.omg.CORBA.portable.InputStream;
049    import org.omg.CORBA.portable.InvokeHandler;
050    import org.omg.CORBA.portable.OutputStream;
051    import org.omg.CORBA.portable.ResponseHandler;
052    import org.omg.CORBA.portable.Streamable;
053    
054    /**
055     * The binding iterator implementation base.
056     *
057     * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
058     */
059    public abstract class _BindingIteratorImplBase
060      extends DynamicImplementation
061      implements BindingIterator, InvokeHandler
062    {
063      /**
064       * Use serialVersionUID (v1.4) for interoperability.
065       */
066      private static final long serialVersionUID = 3472591176635005503L;
067    
068      /**
069       * The binding interator repository id.
070       */
071      private static String[] ids = { BindingIteratorHelper.id() };
072    
073      /**
074       * Return the list of repository ids.
075       */
076      public String[] _ids()
077      {
078        return ids;
079      }
080    
081      /**
082       * Call the required method.
083       */
084      public OutputStream _invoke(String method, InputStream in, ResponseHandler rh)
085      {
086        OutputStream out = null;
087    
088        // We suppose that the next_n should be the most popular.
089        if (method.equals("next_n"))
090          {
091            // The next_n has been invoked.
092            int amount = in.read_ulong();
093            BindingListHolder a_list = new BindingListHolder();
094    
095            boolean result = next_n(amount, a_list);
096    
097            out = rh.createReply();
098            out.write_boolean(result);
099            BindingListHelper.write(out, a_list.value);
100          }
101        else if (method.equals("next_one"))
102          {
103            // The next_one has been invoked.
104            BindingHolder a_binding = new BindingHolder();
105    
106            boolean result = next_one(a_binding);
107    
108            out = rh.createReply();
109            out.write_boolean(result);
110            BindingHelper.write(out, a_binding.value);
111          }
112        else if (method.equals("destroy"))
113          {
114            // The destroy has been invoked.
115            destroy();
116            out = rh.createReply();
117          }
118        else
119          throw new BAD_OPERATION(method, Minor.Method,
120            CompletionStatus.COMPLETED_MAYBE);
121    
122        return out;
123      }
124    
125      /**
126       * The obsolete invocation using server request. Implemented for
127       * compatibility reasons, but is it more effectinve to use
128       * {@link #_invoke}.
129       *
130       * @param request a server request.
131       */
132      public void invoke(ServerRequest request)
133      {
134        // "destroy" has a void return type, the two other methods - boolean.
135        Streamable result =
136          request.operation().equals("destroy") ? null : new BooleanHolder();
137        gnu.CORBA.ServiceRequestAdapter.invoke(request, this, result);
138      }
139    }