/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.bjorne;
import org.jnode.driver.console.CompletionInfo;
import org.jnode.shell.CommandLine.Token;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.CommandSyntaxException;
/**
* The SetFlagArgument understands '-x' and '+x' forms of a flag. The first
* form results in Boolean.FALSE, the second form results in Boolean.TRUE.
*
* @author crawley@jnode.org
*/
public class SetFlagArgument extends Argument<Boolean> {
private final char flagCh;
public SetFlagArgument(String label, char flagCh, int flags, String description) {
super(label, flags, new Boolean[0], description);
this.flagCh = flagCh;
}
@Override
protected String argumentKind() {
return "bjorne 'set' flag";
}
@Override
protected Boolean doAccept(Token value, int flags) throws CommandSyntaxException {
String tok = value.text;
if (tok.length() != 2 || tok.charAt(1) != flagCh ||
(tok.charAt(0) != '-' && tok.charAt(0) != '+')) {
throw new CommandSyntaxException("this does not match the '-'" + flagCh + " flag");
}
return Boolean.valueOf(tok.charAt(0) == '+');
}
@Override
public void doComplete(CompletionInfo completions, String partial, int flags) {
if (("-" + flagCh).startsWith(partial)) {
completions.addCompletion("-" + flagCh);
}
if (("+" + flagCh).startsWith(partial)) {
completions.addCompletion("+" + flagCh);
}
}
}