org.apache.taglibs.standard.lang.jstl.BinaryOperator Maven / Gradle / Ivy
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package org.apache.taglibs.standard.lang.jstl;
/**
*
* This is the superclass for all binary operators
*
* @author Nathan Abramson - Art Technology Group
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
**/
public abstract class BinaryOperator
{
//-------------------------------------
/**
*
* Constructor
**/
public BinaryOperator ()
{
}
//-------------------------------------
// Expression methods
//-------------------------------------
/**
*
* Returns the symbol representing the operator
**/
public abstract String getOperatorSymbol ();
//-------------------------------------
/**
*
* Applies the operator to the given pair of values
**/
public abstract Object apply (Object pLeft,
Object pRight,
Object pContext,
Logger pLogger)
throws ELException;
//-------------------------------------
/**
*
* Returns true if evaluation is necessary given the specified Left
* value. The And/OrOperators make use of this
**/
public boolean shouldEvaluate (Object pLeft)
{
return true;
}
//-------------------------------------
/**
*
* Returns true if the operator expects its arguments to be coerced
* to Booleans. The And/Or operators set this to true.
**/
public boolean shouldCoerceToBoolean ()
{
return false;
}
//-------------------------------------
}