de.uka.ipd.sdq.beagle.core.evaluableexpressions

Class NaturalLogarithmExpression

java.lang.Object

de.uka.ipd.sdq.beagle.core.evaluableexpressions.NaturalLogarithmExpression

All Implemented Interfaces:

EvaluableExpression

public class NaturalLogarithmExpression
extends Object
implements EvaluableExpression

Expression that executes the natural logarithmic function. The antilogarithm is a contained EvaluableExpression and the base is e (Euler’s number).

Field Summary

Fields inherited from interface de.uka.ipd.sdq.beagle.core.evaluableexpressions.EvaluableExpression

FALSE

Constructor Summary

Constructors

Constructor and Description
NaturalLogarithmExpression(EvaluableExpression antilogarithm) Builds an expression which returns the result of a logarithm of the antilogarithm to the base.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object object)
double	evaluate(EvaluableVariableAssignment variableAssignments) Calculates this expression’s value for the given variableAssignments.
EvaluableExpression	getAntilogarithm() Get the EvaluableExpression which is the antilogarithm, or parameter of the LogarithmExpression.
int	hashCode()
void	receive(EvaluableExpressionVisitor visitor) Calls the appropriate overload of EvaluableExpressionVisitor.visit(de.uka.ipd.sdq.beagle.core.evaluableexpressions.AdditionExpression) on visitor.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

NaturalLogarithmExpression

public NaturalLogarithmExpression(EvaluableExpression antilogarithm)

Builds an expression which returns the result of a logarithm of the antilogarithm to the base.

Parameters:

antilogarithm - The antilogarithm for this expression. Must not be null.

Method Detail

getAntilogarithm

public EvaluableExpression getAntilogarithm()

Get the EvaluableExpression which is the antilogarithm, or parameter of the LogarithmExpression.

Returns:

The antilogarithm expression.

receive

public void receive(EvaluableExpressionVisitor visitor)

Description copied from interface: EvaluableExpression

Calls the appropriate overload of EvaluableExpressionVisitor.visit(de.uka.ipd.sdq.beagle.core.evaluableexpressions.AdditionExpression) on visitor. This implements the well-known visitor pattern.

Specified by:

receive in interface EvaluableExpression

Parameters:

visitor - The visitor wishing to visit this expression.

evaluate

public double evaluate(EvaluableVariableAssignment variableAssignments)

Description copied from interface: EvaluableExpression

Calculates this expression’s value for the given variableAssignments.

Specified by:

evaluate in interface EvaluableExpression

Parameters:

variableAssignments - must assign a value to at least all EvaluableVariables contained in this expression.

Returns:

the value for the given assignments.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object