001 /* 002 * Copyright (C) 2010 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.cmdline.completers; 021 022 import org.crsh.cmdline.ParameterDescriptor; 023 import org.crsh.cmdline.spi.Completer; 024 import org.crsh.cmdline.spi.ValueCompletion; 025 026 /** 027 * A {@link Completer} implementation that returns no completion results. 028 * 029 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 030 * @version $Revision$ 031 */ 032 public class EmptyCompleter implements Completer { 033 034 /** . */ 035 private static final EmptyCompleter instance = new EmptyCompleter(); 036 037 /** 038 * Returns the empty completer instance. 039 * 040 * @return the instance 041 */ 042 public static EmptyCompleter getInstance() { 043 return instance; 044 } 045 046 /** 047 * Returns the value returned by {@link java.util.Collections#emptyList()}. 048 */ 049 public ValueCompletion complete(ParameterDescriptor<?> parameter, String prefix) { 050 return ValueCompletion.create(); 051 } 052 }