001    /*
002     * Copyright (C) 2012 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    
020    package org.crsh.cli.completers;
021    
022    import org.crsh.cli.descriptor.ParameterDescriptor;
023    import org.crsh.cli.spi.Completer;
024    import org.crsh.cli.spi.Completion;
025    
026    public class EmptyCompleter implements Completer {
027    
028      /** . */
029      private static final EmptyCompleter instance = new EmptyCompleter();
030    
031      /**
032       * Returns the empty completer instance.
033       *
034       * @return the instance
035       */
036      public static EmptyCompleter getInstance() {
037        return instance;
038      }
039    
040      /**
041       * Returns the value returned by {@link java.util.Collections#emptyList()}.
042       */
043      public Completion complete(ParameterDescriptor parameter, String prefix) {
044        return Completion.create();
045      }
046    }