PowerOperator (LibFormula 9.3.0.0-424 API)

java.lang.Object
- org.pentaho.reporting.libraries.formula.operators.AbstractNumericOperator
- - org.pentaho.reporting.libraries.formula.operators.PowerOperator

All Implemented Interfaces:

Serializable, InfixOperator
```
public class PowerOperator
extends AbstractNumericOperator
```
This has to be implemented manually if we want to support arbitary precision. Damn, do I have to implement the logarithm computation as well? For now: Ignore that and use doubles!

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 Description

PowerOperator()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected 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
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - PowerOperator
```
public PowerOperator()
```
- Method Detail
  - evaluate
```
protected Number evaluate(Number number1,
                          Number number2)
                   throws EvaluationException
```
    Specified by:
    
    evaluate in class AbstractNumericOperator
    
    Throws:
    
    EvaluationException
  - 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