Annotation @XStreamOmitField has no effect

This is the class to be serialized with XStream:

import com.thoughtworks.xstream.annotations.XStreamOmitField;

public class XStreamTestObject

{ int shouldNotBeOmitted = 1; @XStreamOmitField int shouldBeOmitted = 2; }

The @XStreamOmitField has no effect. Using XStream.omitField() does the job as required. This is the class that calls the serialization

import com.thoughtworks.xstream.XStream;

public class XStreamTestMain {

public static void main(String[] args)

{ XStream xs = new XStream(); System.out.println("using annotation-------------------------"); System.out.println(xs.toXML(new XStreamTestObject())); xs.omitField(XStreamTestObject.class, "shouldBeOmitted"); System.out.println("using omitField()------------------------"); System.out.println(xs.toXML(new XStreamTestObject())); }

}

And this is the output:
using annotation-------------------------
<XStreamTestObject>
<shouldNotBeOmitted>1</shouldNotBeOmitted>
<shouldBeOmitted>2</shouldBeOmitted>
</XStreamTestObject>
using omitField()------------------------
<XStreamTestObject>
<shouldNotBeOmitted>1</shouldNotBeOmitted>
</XStreamTestObject>