/* * b_NonNegative_s.java */package EDU.gatech.cc.is.clay;import java.lang.*;/** * True if embedded node is non-Negative. * <P> * For detailed information on how to configure behaviors, see the * <A HREF="../clay/docs/index.html">Clay page</A>. * <P> * <A HREF="../COPYRIGHT.html">Copyright</A> * (c)1997, 1998 Tucker Balch * * @author Tucker Balch * @version $Revision: 1.1 $ */public class b_NonNegative_s extends NodeBoolean	{	/** 	Turn debug printing on or off.	*/	public static final boolean DEBUG = Node.DEBUG;	private NodeScalar	embedded1;	/**	Instantiate a b_NonNegative_s schema.	@param im1 NodeScalar, the embedded node that generates a scalar			to be detected.	*/	public b_NonNegative_s(NodeScalar im1)		{		if (DEBUG) System.out.println("b_NonNegative_s: instantiated.");		embedded1 = im1;		}	boolean	last_val = false;	long	lasttime = 0;	/**	Return a boolean indicating if the embedded schema	is non-Negative.	@param timestamp long, only get new information if timestamp > than last call                or timestamp == -1.	@return true if non-Negative, false if otherwise.	*/	public boolean Value(long timestamp)		{                if (DEBUG) System.out.println("b_NonNegative_s: Value()");                 if ((timestamp > lasttime)||(timestamp == -1))                        {                        /*--- reset the timestamp ---*/                        if (timestamp > 0) lasttime = timestamp;                         /*--- compute the output ---*/                        double tmp = embedded1.doubleValue(timestamp);			if (tmp >= 0)				last_val = true;			else				last_val = false;			if (false) System.out.println("non Negative " +last_val);                        }		return (last_val);		}        }