package prefuse.data.expression;
import prefuse.data.Schema;
import prefuse.data.Tuple;
/**
* Abstract base class for dedicated Predicate instances.
*
* @author <a href="http://jheer.org">jeffrey heer</a>
*/
public abstract class AbstractPredicate extends AbstractExpression
implements Predicate
{
/**
* Returns boolean.class.
* @see prefuse.data.expression.Expression#getType(prefuse.data.Schema)
*/
public Class getType(Schema s) {
return boolean.class;
}
/**
* Returns the wrapper Object type for the result of
* {@link Expression#getBoolean(Tuple)}.
* @see prefuse.data.expression.Expression#get(prefuse.data.Tuple)
*/
public Object get(Tuple t) {
return ( getBoolean(t) ? Boolean.TRUE : Boolean.FALSE );
}
} // end of class AbstractPredicate