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.cmdline.matcher.impl;
021    
022    import org.crsh.cmdline.CommandCompletion;
023    import org.crsh.cmdline.CommandDescriptor;
024    import org.crsh.cmdline.Delimiter;
025    import org.crsh.cmdline.matcher.CmdCompletionException;
026    import org.crsh.cmdline.matcher.tokenizer.Token;
027    import org.crsh.cmdline.spi.ValueCompletion;
028    
029    import java.util.Set;
030    
031    class OptionCompletion<T> extends Completion {
032    
033      /** . */
034      private final CommandDescriptor<T, ?> descriptor;
035    
036      /** . */
037      private final Token.Literal.Option prefix;
038    
039      OptionCompletion(CommandDescriptor<T, ?> descriptor, Token.Literal.Option prefix) {
040        this.descriptor = descriptor;
041        this.prefix = prefix;
042      }
043    
044      @Override
045      protected CommandCompletion complete() throws CmdCompletionException {
046        ValueCompletion completions = new ValueCompletion(prefix.getValue());
047        Set<String> optionNames = prefix instanceof Token.Literal.Option.Short ? descriptor.getShortOptionNames() : descriptor.getLongOptionNames();
048        for (String optionName : optionNames) {
049          if (optionName.startsWith(prefix.getValue())) {
050            completions.put(optionName.substring(prefix.getValue().length()), true);
051          }
052        }
053        return new CommandCompletion(Delimiter.EMPTY, completions);
054      }
055    }