package org.syrup.functions;
import org.syrup.Context;
import org.syrup.Data;
import org.syrup.Function;
import org.syrup.Result;
import org.syrup.helpers.DataImpl;
import org.syrup.helpers.ResultImpl;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.logging.Logger;
/**
* Flips the first input in such a way that if the first input is 0, the first
* output will be 1. Vice versa, when the first input is 1, the first output
* will be 0.
*
* @author Robbert van Dalen
*/
public class Flip implements Function
{
static final String COPYRIGHT = "Copyright 2005 Robbert van Dalen."
+ "At your option, you may copy, distribute, or make derivative works under "
+ "the terms of The Artistic License. This License may be found at "
+ "http://www.opensource.org/licenses/artistic-license.php. "
+ "THERE IS NO WARRANTY; USE THIS PRODUCT AT YOUR OWN RISK.";
private final static Logger logger = Logger.getLogger("org.syrup.functions.Flip");
private final static Data _0 = new DataImpl(new String("0").getBytes());
private final static Data _1 = new DataImpl(new String("1").getBytes());
/**
*/
public Result execute(Context context)
{
try
{
if (context.in_1_link() != null)
{
Data in1 = context.in_1_link().content();
String d = new String(in1.bytes());
Data result = _0;
if (d.equals("0"))
{
result = _1;
}
return new ResultImpl(context, true, true, result, null);
}
else
{
throw new Exception("in-1 is mandatory");
}
}
catch (Throwable e)
{
// Not a number?
return new ResultImpl(context, true, true, null, org.syrup.helpers.Utils.manageError(logger, e, "Flip error"));
}
}
}