org.planx.xpath.expr.operator
Class Operator

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

Direct Known Subclasses:

AndOperator, EqualityOperator, OrOperator, RelationalOperator, UnionOperator

public abstract class Operator
extends Expression

An XPath operator.

Field Summary

protected Expression	e1
protected Expression	e2

Constructor Summary

Operator(Expression e1, Expression e2)

Method Summary

XObject	evaluate(Context ctxt, Environment env, Navigator nav) Evaluate the expression for the given context using the specified environment.
protected abstract XObject	evaluate(XObject o1, XObject o2, Navigator nav)
protected abstract String	operatorName()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

e1

protected final Expression e1

e2

protected final Expression e2

Constructor Detail

Operator

public Operator(Expression e1,
                Expression e2)

Method Detail

evaluate

public XObject evaluate(Context ctxt,
                        Environment env,
                        Navigator nav)
                 throws XPathException

Description copied from class: Expression

Evaluate the expression for the given context using the specified environment.

Specified by:

evaluate in class Expression

Throws:

XPathException

evaluate

protected abstract XObject evaluate(XObject o1,
                                    XObject o2,
                                    Navigator nav)
                             throws XPathException

Throws:

XPathException

operatorName

protected abstract String operatorName()

toString

public String toString()

Overrides:

toString in class Object