Class BinaryOperator
- java.lang.Object
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- org.apache.taglibs.standard.lang.jstl.BinaryOperator
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- Direct Known Subclasses:
AndOperator
,ArithmeticOperator
,DivideOperator
,EqualityOperator
,IntegerDivideOperator
,ModulusOperator
,OrOperator
,RelationalOperator
public abstract class BinaryOperator extends java.lang.Object
This is the superclass for all binary operators
- Version:
- $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
- Author:
- Nathan Abramson - Art Technology Group
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Constructor Summary
Constructors Constructor Description BinaryOperator()
Constructor
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description abstract java.lang.Object
apply(java.lang.Object pLeft, java.lang.Object pRight, java.lang.Object pContext, Logger pLogger)
Applies the operator to the given pair of valuesabstract java.lang.String
getOperatorSymbol()
Returns the symbol representing the operatorboolean
shouldCoerceToBoolean()
Returns true if the operator expects its arguments to be coerced to Booleans.boolean
shouldEvaluate(java.lang.Object pLeft)
Returns true if evaluation is necessary given the specified Left value.
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Method Detail
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getOperatorSymbol
public abstract java.lang.String getOperatorSymbol()
Returns the symbol representing the operator
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apply
public abstract java.lang.Object apply(java.lang.Object pLeft, java.lang.Object pRight, java.lang.Object pContext, Logger pLogger) throws ELException
Applies the operator to the given pair of values- Throws:
ELException
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shouldEvaluate
public boolean shouldEvaluate(java.lang.Object pLeft)
Returns true if evaluation is necessary given the specified Left value. The And/OrOperators make use of this
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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.
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