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.impl.completion;
021    
022    import org.crsh.cli.impl.Delimiter;
023    import org.crsh.cli.completers.EmptyCompleter;
024    import org.crsh.cli.descriptor.ParameterDescriptor;
025    import org.crsh.cli.spi.Completer;
026    
027    class ParameterCompletion extends Completion {
028    
029      /** . */
030      private final String prefix;
031    
032      /** . */
033      private final Delimiter delimiter;
034    
035      /** . */
036      private final ParameterDescriptor parameter;
037    
038      /** . */
039      private final Completer completer;
040    
041      public ParameterCompletion(String prefix, Delimiter delimiter, ParameterDescriptor parameter, Completer completer) {
042        this.prefix = prefix;
043        this.delimiter = delimiter;
044        this.parameter = parameter;
045        this.completer = completer;
046      }
047    
048      public CompletionMatch complete() throws CompletionException {
049    
050        Class<? extends Completer> completerType = parameter.getCompleterType();
051        Completer completer = this.completer;
052    
053        // Use the most adapted completer
054        if (completerType != EmptyCompleter.class) {
055          try {
056            completer = completerType.newInstance();
057          }
058          catch (Exception e) {
059            throw new CompletionException(e);
060          }
061        }
062    
063        //
064        if (completer != null) {
065          try {
066            return new CompletionMatch(delimiter, completer.complete(parameter, prefix));
067          }
068          catch (Exception e) {
069            throw new CompletionException(e);
070          }
071        } else {
072          return new CompletionMatch(delimiter, org.crsh.cli.spi.Completion.create());
073        }
074      }
075    }