/*
* $Id$
*
* 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 AssignmentArgument understands 'arguments' of the form <name>['='[<value>]].
* It will perform completion of the <name> component against the variable names
* defined in a supplied BjorneContext.
*
* @author crawley@jnode.org
*/
public class AssignmentArgument extends Argument<String> {
private final BjorneContext context;
public AssignmentArgument(String label, BjorneContext context, int flags, String description) {
super(label, flags, new String[0], description);
this.context = context;
}
@Override
protected String argumentKind() {
return "bjorne assignment";
}
@Override
protected String doAccept(Token value, int flags) throws CommandSyntaxException {
String tok = value.text;
int pos = tok.indexOf('=');
String name = (pos == -1) ? tok : tok.substring(0, pos);
if (!BjorneToken.isName(name)) {
throw new CommandSyntaxException("invalid name ('" + name + "')");
}
return tok;
}
@Override
public void doComplete(CompletionInfo completions, String partial, int flags) {
int pos = partial.indexOf('=');
if (pos != -1) {
return;
}
for (String varName : context.getVariableNames()) {
if (varName.startsWith(partial)) {
completions.addCompletion(varName, true);
}
}
}
}