001/* BindingIteratorPOA.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.CosNaming;
040
041import gnu.CORBA.Minor;
042
043import org.omg.CORBA.BAD_OPERATION;
044import org.omg.CORBA.CompletionStatus;
045import org.omg.CORBA.portable.InputStream;
046import org.omg.CORBA.portable.InvokeHandler;
047import org.omg.CORBA.portable.OutputStream;
048import org.omg.CORBA.portable.ResponseHandler;
049import org.omg.PortableServer.POA;
050import org.omg.PortableServer.Servant;
051
052/**
053 * The binding iterator servant, used in POA-based naming service
054 * implementations.
055 * 
056 * @since 1.4 
057 *
058 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
059 */
060public abstract class BindingIteratorPOA
061  extends Servant
062  implements BindingIteratorOperations, InvokeHandler
063{
064  /** @inheritDoc */
065  public String[] _all_interfaces(POA poa, byte[] object_ID)
066  {
067    return new String[] { BindingIteratorHelper.id() };
068  }
069
070  /**
071   * Call the required method.
072   */
073  public OutputStream _invoke(String method, InputStream in, ResponseHandler rh)
074  {
075    OutputStream out = null;
076
077    // We suppose that the next_n should be the most popular.
078    if (method.equals("next_n"))
079      {
080        // The next_n has been invoked.
081        int amount = in.read_ulong();
082        BindingListHolder a_list = new BindingListHolder();
083
084        boolean result = next_n(amount, a_list);
085
086        out = rh.createReply();
087        out.write_boolean(result);
088        BindingListHelper.write(out, a_list.value);
089      }
090    else if (method.equals("next_one"))
091      {
092        // The next_one has been invoked.
093        BindingHolder a_binding = new BindingHolder();
094
095        boolean result = next_one(a_binding);
096
097        out = rh.createReply();
098        out.write_boolean(result);
099        BindingHelper.write(out, a_binding.value);
100      }
101    else if (method.equals("destroy"))
102      {
103        // The destroy has been invoked.
104        destroy();
105        out = rh.createReply();
106      }
107    else
108      throw new BAD_OPERATION(method, Minor.Method, 
109        CompletionStatus.COMPLETED_MAYBE);
110
111    return out;
112  }
113
114  /**
115   * Get the CORBA object that delegates calls to this servant. The servant must
116   * be already connected to an ORB.
117   */
118  public BindingIterator _this()
119  {
120    return BindingIteratorHelper.narrow(super._this_object());
121  }
122
123  /**
124   * Get the CORBA object that delegates calls to this servant. Connect to the
125   * given ORB, if needed.
126   */
127  public BindingIterator _this(org.omg.CORBA.ORB orb)
128  {
129    return BindingIteratorHelper.narrow(super._this_object(orb));
130  }
131}