Package de.uka.ipd.sdq.stoex.analyser.operations

Class CompareOperation

java.lang.Object

de.uka.ipd.sdq.stoex.analyser.operations.CompareOperation

Direct Known Subclasses:

EqualsOperation, GreaterEqualOperation, GreaterOperation, LessEqualOperation, LessOperation, NotEqualOperation

public abstract class CompareOperation
extends Object

Abstract class with interface for compare operations (e.g., equals, less, etc.). Includes some helper methods for probability functions.

Constructor Summary

Constructors

Constructor	Description
CompareOperation()

Method Summary

Modifier and Type	Method	Description
IProbabilityMassFunction	compare(Object left, Object right)	Compares to objects that represent the left-hand side and the right-hand side of a comparison expression.
double	comparePointWise(IProbabilityMassFunction left, IProbabilityMassFunction right, CompareOperation op)	Compares two probability mass functions pointwise.
IProbabilityMassFunction	getBoolPMF(double trueProb)	Converts a probability into a boolean PMF.
protected abstract IProbabilityMassFunction	getComparePMF(boolean left, boolean right)	Compares two boolean values.
protected abstract IProbabilityMassFunction	getComparePMF(double left, double right)	Compares two doubles.
protected abstract IProbabilityMassFunction	getComparePMF(double left, IProbabilityMassFunction right)	Compares a PMF with a double.
protected abstract IProbabilityMassFunction	getComparePMF(IProbabilityMassFunction left, double right)	Compares a PMF with a double.
protected abstract IProbabilityMassFunction	getComparePMF(IProbabilityMassFunction left, IProbabilityMassFunction right)	Compares two PMFs.
protected abstract IProbabilityMassFunction	getComparePMF(String left, IProbabilityMassFunction right)	Compares a String and an EnumPMF
protected abstract IProbabilityMassFunction	getComparePMF(String left, String right)	Compares two Strings.
double	getProbabilityForValue(IProbabilityMassFunction iPMF, double valueToSeek)	Retrieves the probability for a given value from a PMF.
double	getThresholdProbability(IProbabilityMassFunction iPMF, double threshold, boolean includeThreshold)	Returns the sum of probabilities before a given value of a PMF.
static IProbabilityMassFunction	invertBoolPMF(IProbabilityMassFunction function)	This method inverts a BoolPMF as required by a NOT statement.

Methods inherited from class java.lang.Object

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

Constructor Detail

CompareOperation

public CompareOperation()

Method Detail

compare

public IProbabilityMassFunction compare(Object left,
                                        Object right)

Compares to objects that represent the left-hand side and the right-hand side of a comparison expression.

Parameters:

left -

right -

Returns:

comparePointWise

public double comparePointWise(IProbabilityMassFunction left,
                               IProbabilityMassFunction right,
                               CompareOperation op)

Compares two probability mass functions pointwise.

Parameters:

left -

right -

Returns:

getBoolPMF

public IProbabilityMassFunction getBoolPMF(double trueProb)

Converts a probability into a boolean PMF. The probability is taken as value for true and 1-probability as value for false.

Parameters:

left -

right -

Returns:

getProbabilityForValue

public double getProbabilityForValue(IProbabilityMassFunction iPMF,
                                     double valueToSeek)

Retrieves the probability for a given value from a PMF.

Parameters:

iPMF -

valueToSeek -

Returns:

getThresholdProbability

public double getThresholdProbability(IProbabilityMassFunction iPMF,
                                      double threshold,
                                      boolean includeThreshold)

Returns the sum of probabilities before a given value of a PMF.

Parameters:

iPMF -

threshold -

includeThreshold -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(boolean left,
                                                          boolean right)

Compares two boolean values.

Parameters:

left -

right -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(double left,
                                                          double right)

Compares two doubles.

Parameters:

left -

right -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(double left,
                                                          IProbabilityMassFunction right)

Compares a PMF with a double.

Parameters:

left -

right -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(IProbabilityMassFunction left,
                                                          double right)

Compares a PMF with a double.

Parameters:

left -

right -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(IProbabilityMassFunction left,
                                                          IProbabilityMassFunction right)

Compares two PMFs.

Parameters:

left -

right -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(String left,
                                                          IProbabilityMassFunction right)

Compares a String and an EnumPMF

Parameters:

left -

right -

Returns:

getComparePMF

protected abstract IProbabilityMassFunction getComparePMF(String left,
                                                          String right)

Compares two Strings.

Parameters:

left -

right -

Returns:

invertBoolPMF

public static IProbabilityMassFunction invertBoolPMF(IProbabilityMassFunction function)

This method inverts a BoolPMF as required by a NOT statement. This method would be better placed elsewhere, but it accesses internal knowledge how a BoolPMF is represented as a IProbabilityMassFunction which is only available in this class.

Parameters:

function -

Returns:

The inverted function, assuming this is a BoolPMF.

Throws:

UnsupportedOperationException - if the passed PMF is not a BoolPMF, i.e. if it does not contain the String literals "TRUE" and "FALSE".