org.pentaho.reporting.libraries.formula.operators

Class AddOperator

java.lang.Object

org.pentaho.reporting.libraries.formula.operators.AbstractNumericOperator

org.pentaho.reporting.libraries.formula.operators.AddOperator

All Implemented Interfaces:

Serializable, InfixOperator

public class AddOperator
extends AbstractNumericOperator

Null-Values are converted into ZERO

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AddOperator()

Method Summary

Methods

Modifier and Type	Method and Description
Number	evaluate(Number number1, Number number2)
int	getLevel()
boolean	isAssociative() Defines, whether the operation is associative.
boolean	isLeftOperation() Defines the bind-direction of the operator.
String	toString()

Methods inherited from class org.pentaho.reporting.libraries.formula.operators.AbstractNumericOperator

evaluate

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AddOperator

public AddOperator()

Method Detail

evaluate

public Number evaluate(Number number1,
              Number number2)

getLevel

public int getLevel()

toString

public String toString()

Overrides:

toString in class Object

isLeftOperation

public boolean isLeftOperation()

Description copied from interface: InfixOperator

Defines the bind-direction of the operator. That direction defines, in which direction a sequence of equal operators is resolved.

Returns:

true, if the operation is left-binding, false if right-binding

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).

Returns:

true, if the operation is associative, false otherwise