package edu.cmu.cs.ark.yc.config.stringparsers;
import com.martiansoftware.jsap.ParseException;
import com.martiansoftware.jsap.StringParser;
/**
* A {@link StringParser} extension for positive double arguments.
*
* @author Yanchuan Sim
* @version 0.2
*/
public class PositiveDoubleStringParser extends StringParser
{
/*
* (non-Javadoc)
* @see com.martiansoftware.jsap.StringParser#parse(java.lang.String)
*/
@Override
public Object parse(String arg) throws ParseException
{
Double result = null;
try
{
result = new Double(arg);
}
catch (NumberFormatException nfe)
{
throw new ParseException("Unable to convert '" + arg + "' to a Double.", nfe);
}
if (result <= 0)
throw new ParseException("Value has to be greater than 0.0.");
return result;
}
}