boolean test(Symbol buffer, Chunk bufferChunk, Instantiation inst) {
boolean negated = (operator != null && operator.equals("-"));
Symbol realSlot = (slot.isVariable()) ? inst.get(slot) : slot;
if (realSlot == null) {
// slot variable isn't defined yet, so save it in the instantiation to check later
inst.addDelayedSlotCondition(buffer, this, bufferChunk);
return true; // negated; // false;
}
Symbol bufferValue = bufferChunk.get(realSlot);
if (bufferValue == null) return negated; // false;
Symbol testValue = value;
if (testValue.isVariable()) {
if (bufferValue == Symbol.nil) return negated; // false;
testValue = inst.get(testValue);
if (testValue == null) {
inst.set(value, bufferValue);
return true;
}
}
if (operator == null) return (testValue == bufferValue);
else if (operator.equals("-")) return (testValue != bufferValue);
else {
double bufferNumber = Double.valueOf(bufferValue.getString());
double testNumber = Double.valueOf(testValue.getString());
if (operator.equals("<")) return (bufferNumber < testNumber);
else if (operator.equals(">")) return (bufferNumber > testNumber);
else if (operator.equals("<=")) return (bufferNumber <= testNumber);
else if (operator.equals(">=")) return (bufferNumber >= testNumber);
}
return false;
}
/**
* Gets a string representation of the slot condition with an instantiation if provided.
*
* @return the string
*/
public String toString(Instantiation inst, Vector<Symbol> used) {
String s = " ";
if (operator != null) s += operator + " ";
s += slot + " " + value;
if (inst != null && value.isVariable() && (used == null || !used.contains(value))) {
Symbol v = inst.get(value);
if (v != null) {
s = String.format("%-35s", s);
s += "[" + value + " <- " + v + "]";
}
if (used != null) used.add(value);
}
return s;
}
