org.planx.xpath.expr.operator
Class RelationalOperator

java.lang.Object
  org.planx.xpath.expr.Expression
      org.planx.xpath.expr.operator.Operator
          org.planx.xpath.expr.operator.RelationalOperator

Direct Known Subclasses:

GreaterOrEqualOperator, GreaterThanOperator, LessOrEqualOperator, LessThanOperator

public abstract class RelationalOperator
extends Operator

Relational operators include equals, not equals, less than, greater then, etc.

Field Summary

Fields inherited from class org.planx.xpath.expr.operator.Operator

e1, e2

Constructor Summary

RelationalOperator(Expression e1, Expression e2)

Method Summary

protected abstract boolean	compare(double v1, double v2)
protected abstract boolean	compareSets(double v1_min, double v1_max, double v2_min, double v2_max)
protected XObject	evaluate(XObject o1, XObject o2, Navigator navigator)

Methods inherited from class org.planx.xpath.expr.operator.Operator

evaluate, operatorName, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RelationalOperator

public RelationalOperator(Expression e1,
                          Expression e2)

Method Detail

evaluate

protected XObject evaluate(XObject o1,
                           XObject o2,
                           Navigator navigator)
                    throws XPathException

Specified by:

evaluate in class Operator

Throws:

XPathException

compareSets

protected abstract boolean compareSets(double v1_min,
                                       double v1_max,
                                       double v2_min,
                                       double v2_max)

compare

protected abstract boolean compare(double v1,
                                   double v2)