ExpressionToPDFWrapper

java.lang.Object
- org.palladiosimulator.solver.transformations.ExpressionToPDFWrapper

```
public class ExpressionToPDFWrapper
extends Object
```
Wraps the actual content of an expression to allow computation with it. Only supports probability density function or double so far. Allows to access the expression as a PDF or to get the mean value.

Field Summary

Fields
Modifier and Type Field Description

protected static org.apache.log4j.Logger logger

Constructor Summary

Constructors
Constructor Description

ExpressionToPDFWrapper(de.uka.ipd.sdq.probfunction.ProbabilityDensityFunction pdf)

ExpressionToPDFWrapper(Double meanValue)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static ExpressionToPDFWrapper`	`createExpressionToPDFWrapper(de.uka.ipd.sdq.stoex.Expression rdExpression)`	Can create a wrapper for `ProbabilityFunctionLiteral`s and `NumericLiteral`s.
`Double`	`getMeanValue()`
`de.uka.ipd.sdq.probfunction.ProbabilityDensityFunction`	`getPDF()`
`Double`	`getStandardDeviation()`
`boolean`	`isOriginalPDF()`	Returns whether this resource demand is a derived pdf (i.e.

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

- Field Detail
  - logger
```
protected static org.apache.log4j.Logger logger
```
- Constructor Detail
  - ExpressionToPDFWrapper
```
public ExpressionToPDFWrapper(de.uka.ipd.sdq.probfunction.ProbabilityDensityFunction pdf)
```
  - ExpressionToPDFWrapper
```
public ExpressionToPDFWrapper(Double meanValue)
```
- Method Detail
  - createExpressionToPDFWrapper
```
public static ExpressionToPDFWrapper createExpressionToPDFWrapper(de.uka.ipd.sdq.stoex.Expression rdExpression)
```
    Can create a wrapper for ProbabilityFunctionLiterals and NumericLiterals.
    
    Parameters:
    
    rdExpression -
    
    Returns:
  - getPDF
```
public de.uka.ipd.sdq.probfunction.ProbabilityDensityFunction getPDF()
```
  - getMeanValue
```
public Double getMeanValue()
```
  - getStandardDeviation
```
public Double getStandardDeviation()
```
  - isOriginalPDF
```
public boolean isOriginalPDF()
```
    Returns whether this resource demand is a derived pdf (i.e. it has been created using a mean value) or whether it is an original pdf (i.e. the mean value is derived).
    
    Returns:
    
    true if it has been created using #ResourceDemandWrapper(ParametricResourceDemand, ProbabilityDensityFunction), false if this has been created using #ResourceDemandWrapper(ParametricResourceDemand, Double).