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 Object	apply(Object pLeft, Object pRight, Logger pLogger) Applies the operator to the given pair of values
abstract String	getOperatorSymbol() Returns the symbol representing the operator
boolean	shouldCoerceToBoolean() Returns true if the operator expects its arguments to be coerced to Booleans.
boolean	shouldEvaluate(Object pLeft) Returns true if evaluation is necessary given the specified Left value.

Constructor Detail

public BinaryOperator()

Constructor

public abstract Object apply(Object pLeft, Object pRight, Logger pLogger)

Applies the operator to the given pair of values

public abstract String getOperatorSymbol()

Returns the symbol representing the operator

public boolean shouldCoerceToBoolean()

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

public boolean shouldEvaluate(Object pLeft)

Returns true if evaluation is necessary given the specified Left value. The And/OrOperators make use of this