org.pentaho.reporting.libraries.formula.operators

Class MultiplyOperator

java.lang.Object

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

org.pentaho.reporting.libraries.formula.operators.MultiplyOperator

All Implemented Interfaces:

java.io.Serializable, InfixOperator

public class MultiplyOperator
extends AbstractNumericOperator

Creation-Date: 31.10.2006, 16:34:11

Author:

Thomas Morgner

See Also:

Serialized Form

Field Summary

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

ZERO

Constructor Summary

Constructors

Constructor and Description
MultiplyOperator()

Method Summary

Methods

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

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

evaluate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MultiplyOperator

public MultiplyOperator()

Method Detail

evaluate

protected java.lang.Number evaluate(java.lang.Number number1,
                        java.lang.Number number2)
                             throws EvaluationException

Specified by:

evaluate in class AbstractNumericOperator

Throws:

EvaluationException

getLevel

public int getLevel()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.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