org.apache.commons.el

Class BinaryOperator

public abstract class BinaryOperator extends Object

This is the superclass for all binary operators

Version: $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $

Author: Nathan Abramson - Art Technology Group

Constructor Summary
BinaryOperator()
Constructor
Method Summary
abstract Objectapply(Object pLeft, Object pRight, Logger pLogger)
Applies the operator to the given pair of values
abstract StringgetOperatorSymbol()
Returns the symbol representing the operator
booleanshouldCoerceToBoolean()
Returns true if the operator expects its arguments to be coerced to Booleans.
booleanshouldEvaluate(Object pLeft)
Returns true if evaluation is necessary given the specified Left value.

Constructor Detail

BinaryOperator

public BinaryOperator()
Constructor

Method Detail

apply

public abstract Object apply(Object pLeft, Object pRight, Logger pLogger)
Applies the operator to the given pair of values

getOperatorSymbol

public abstract String getOperatorSymbol()
Returns the symbol representing the operator

shouldCoerceToBoolean

public boolean shouldCoerceToBoolean()
Returns true if the operator expects its arguments to be coerced to Booleans. The And/Or operators set this to true.

shouldEvaluate

public boolean shouldEvaluate(Object pLeft)
Returns true if evaluation is necessary given the specified Left value. The And/OrOperators make use of this
Copyright (c) 2001-2002 - Apache Software Foundation