org.pentaho.reporting.libraries.formula.operators

Class AddOperator

public class AddOperator extends AbstractNumericOperator

Null-Values are converted into ZERO

Author: Thomas Morgner

Constructor Summary
	AddOperator()

Method Summary
Number	evaluate(Number number1, Number number2)
int	getLevel()
boolean	isAssociative() Defines, whether the operation is associative.
boolean	isLeftOperation()
String	toString()

Method Detail

evaluate

public Number evaluate(Number number1, Number number2)

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).

Returns: true, if the operation is associative, false otherwise

isLeftOperation

public boolean isLeftOperation()

toString

public String toString()