MathFunction (DataNucleus Core 5.2.10 API)

java.lang.Object
- org.datanucleus.query.inmemory.method.MathFunction

All Implemented Interfaces:

InvocationEvaluator

Direct Known Subclasses:

AbsFunction, ArcCosineFunction, ArcSineFunction, ArcTangentFunction, CeilFunction, CosineFunction, DegreesFunction, ExpFunction, FloorFunction, LogFunction, RadiansFunction, SineFunction, SqrtFunction, TangentFunction
```
public abstract class MathFunction
extends Object
implements InvocationEvaluator
```
Evaluator for mathematical function XYZ(numExpr).

Constructor Summary

Constructors
Constructor Description

MathFunction()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`evaluate(InvokeExpression expr, Object invokedValue, InMemoryExpressionEvaluator eval)`	Method to evaluate the InvokeExpression, as part of the overall evaluation defined by the InMemoryExpressionEvaluator.
`protected abstract double`	`evaluateMathFunction(double num)`
`protected abstract String`	`getFunctionName()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MathFunction
```
public MathFunction()
```
- Method Detail
  - evaluate
```
public Object evaluate(InvokeExpression expr,
                       Object invokedValue,
                       InMemoryExpressionEvaluator eval)
```
    Description copied from interface: InvocationEvaluator
    
    Method to evaluate the InvokeExpression, as part of the overall evaluation defined by the InMemoryExpressionEvaluator.
    
    Specified by:
    
    evaluate in interface InvocationEvaluator
    
    Parameters:
    
    expr - The expression for invocation
    
    invokedValue - Value on which we are invoking
    
    eval - The overall evaluator for in-memory
    
    Returns:
    
    The result
  - getFunctionName
```
protected abstract String getFunctionName()
```
  - evaluateMathFunction
```
protected abstract double evaluateMathFunction(double num)
```