/*
* $Id$
*
* 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.syntax;
import org.jnode.nanoxml.XMLElement;
/**
* An ArgumentSyntax instance allows an Argument to appear exactly once.
*
* @author crawley@jnode.org
*
*/
public class ArgumentSyntax extends Syntax {
private final String argName;
private final String flags;
public ArgumentSyntax(String label, String argName, String flags, String description) {
super(label, description);
this.argName = argName;
this.flags = flags;
if (argName.length() == 0) {
throw new IllegalArgumentException("empty argName");
}
}
public ArgumentSyntax(String label, String argName) {
this(label, argName, null, null);
}
public ArgumentSyntax(String argName) {
this(null, argName, null, null);
}
@Override
public String format(ArgumentBundle bundle) {
try {
Argument<?> arg = bundle.getArgument(this);
return "<" + arg.formatForUsage() + ">";
} catch (SyntaxFailureException ex) {
return "<" + label + "> (Unmatched syntax label!)";
}
}
@Override
public String toString() {
return "ArgumentSyntax{" + super.toString() + ",argName=" +
argName + ",flags=" + flags + "}";
}
@Override
public MuSyntax prepare(ArgumentBundle bundle) {
int flags;
if (this.flags == null || this.flags.length() == 0) {
flags = 0;
} else {
flags = bundle.getArgument(argName).namesToFlags(this.flags);
}
return new MuArgument(label, argName, flags);
}
public String getArgName() {
return argName;
}
@Override
public XMLElement toXML() {
XMLElement element = basicElement("argument");
element.setAttribute("argLabel", argName);
return element;
}
}