package net.fortytwo.ripple.libs.data;
import net.fortytwo.flow.Sink;
import net.fortytwo.ripple.RippleException;
import net.fortytwo.ripple.model.ModelConnection;
import net.fortytwo.ripple.model.PrimitiveStackMapping;
import net.fortytwo.ripple.model.RippleList;
import net.fortytwo.ripple.model.RippleValue;
/**
* A primitive which consumes two items x and y and produces a Boolean value of
* true if x is greater than or equal to y according to Ripple total order, otherwise
* false.
*
* @author Joshua Shinavier (http://fortytwo.net)
*/
public class Gte extends PrimitiveStackMapping {
private static final String[] IDENTIFIERS = {
DataLibrary.NS_2013_03 + "gte"};
public String[] getIdentifiers() {
return IDENTIFIERS;
}
public Gte()
throws RippleException {
super();
}
public Parameter[] getParameters() {
return new Parameter[]{
new Parameter("x", null, true),
new Parameter("y", null, true)};
}
public String getComment() {
return "x y => b -- where b is true if x >= y, otherwise false";
}
public void apply(final RippleList arg,
final Sink<RippleList> solutions,
final ModelConnection mc) throws RippleException {
RippleList stack = arg;
RippleValue a, b, result;
b = stack.getFirst();
stack = stack.getRest();
a = stack.getFirst();
stack = stack.getRest();
result = mc.valueOf(mc.getComparator().compare(a, b) >= 0);
solutions.put(
stack.push(result));
}
}