org.jfree.formula.operators

Class EqualOperator

Implemented Interfaces:
InfixOperator, Serializable

public class EqualOperator
extends java.lang.Object
implements InfixOperator

Creation-Date: 31.10.2006, 16:34:11
Author:
Thomas Morgner

Constructor Summary

EqualOperator()

Method Summary

TypeValuePair
evaluate(FormulaContext context, TypeValuePair value1, TypeValuePair value2)
int
getLevel()
boolean
isAssociative()
Defines, whether the operation is associative.
boolean
isLeftOperation()
String
toString()

Constructor Details

EqualOperator

public EqualOperator()

Method Details

evaluate

public TypeValuePair evaluate(FormulaContext context,
                              TypeValuePair value1,
                              TypeValuePair value2)
            throws EvaluationException
Specified by:
evaluate in interface InfixOperator

getLevel

public int getLevel()
Specified by:
getLevel in interface InfixOperator

isAssociative

public boolean isAssociative()
Defines, whether the operation is associative. For associative operations, the evaluation order does not matter, if the operation appears more than once in an expression, and therefore we can optimize them a lot better than non-associative operations (ie. merge constant parts and precompute them once).
Specified by:
isAssociative in interface InfixOperator
Returns:
true, if the operation is associative, false otherwise

isLeftOperation

public boolean isLeftOperation()
Specified by:
isLeftOperation in interface InfixOperator

toString

public String toString()