/*
* $Id$
*
* 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.shell.CommandLine.Token;
import org.jnode.util.BinaryScaleFactor;
import org.jnode.util.DecimalScaleFactor;
import org.jnode.util.ScaleFactor;
/**
* This Argument class accepts size values. These are integers with an optional decimal
* or binary scaling suffix; e.g. 1K means 1000 or 1024
*
* @author crawley@jnode.org
*/
public class SizeArgument extends Argument<Long> {
private final boolean binaryScaling;
public SizeArgument(String label, int flags, String description) {
this(label, flags, true, description);
}
public SizeArgument(String label, int flags, boolean binaryScaling, String description) {
super(label, flags, new Long[0], description);
this.binaryScaling = binaryScaling;
}
@Override
protected Long doAccept(Token token, int flags) throws CommandSyntaxException {
String str = token.text;
ScaleFactor factor = scaleFactor(str);
if (factor != null) {
str = str.substring(0, str.length() - factor.getUnit().length());
}
try {
long tmp = Long.parseLong(str);
if (factor != null) {
tmp *= factor.getMultiplier();
}
return new Long(tmp);
} catch (NumberFormatException ex) {
throw new CommandSyntaxException("invalid size");
}
}
private ScaleFactor scaleFactor(String str) {
ScaleFactor[] prefixes = binaryScaling ?
BinaryScaleFactor.values() : DecimalScaleFactor.values();
for (ScaleFactor unit : prefixes) {
String unitStr = unit.getUnit();
if ((unitStr.length() > 0) && str.endsWith(unitStr)) {
return unit;
}
}
return null;
}
@Override
protected String state() {
return super.state() + "binaryScaling=" + binaryScaling;
}
@Override
protected String argumentKind() {
return "size";
}
}