org.unitils.reflectionassert.util

Class MatchingScoreCalculator

java.lang.Object

org.unitils.reflectionassert.util.MatchingScoreCalculator

public class MatchingScoreCalculator
extends Object

A utility class to be able to calculate a score of how well 2 elements match. This enables us to find the best matching differences out of all element differences in an unordered collection difference.

Author:

Tim Ducheyne, Filip Neven

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	MatchingScoreCalculator.MatchingScoreVisitor The visitor for visiting the difference tree.

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<Difference,Integer>	cachedMatchingScores Cache for matching scores
protected MatchingScoreCalculator.MatchingScoreVisitor	matchingScoreVisitor The visitor for visiting the difference tree

Constructor Summary

Constructors

Constructor and Description
MatchingScoreCalculator()

Method Summary

Methods

Modifier and Type	Method and Description
int	calculateMatchingScore(Difference difference) Gets the matching score for the given difference.
protected int	getMatchingScore(CollectionDifference collectionDifference) Gets the matching score for a collection difference.
protected int	getMatchingScore(Difference difference) Gets the matching score for a simple difference.
protected int	getMatchingScore(MapDifference mapDifference) Gets the matching score for a map difference.
protected int	getMatchingScore(ObjectDifference objectDifference) Gets the matching score for an object difference.
protected int	getMatchingScore(UnorderedCollectionDifference unorderedCollectionDifference) Gets the matching score for an unordered collection difference.

Methods inherited from class java.lang.Object

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

Field Detail

matchingScoreVisitor

protected MatchingScoreCalculator.MatchingScoreVisitor matchingScoreVisitor

The visitor for visiting the difference tree

cachedMatchingScores

protected Map<Difference,Integer> cachedMatchingScores

Cache for matching scores

Constructor Detail

MatchingScoreCalculator

public MatchingScoreCalculator()

Method Detail

calculateMatchingScore

public int calculateMatchingScore(Difference difference)

Gets the matching score for the given difference.

Parameters:

difference - The difference

Returns:

The score

getMatchingScore

protected int getMatchingScore(Difference difference)

Gets the matching score for a simple difference. This will return 0 in case both objects are of the same type. If both objects are of a different type, they are less likely to be a best match, so 5 is returned.

Parameters:

difference - The difference, not null

Returns:

The score

getMatchingScore

protected int getMatchingScore(ObjectDifference objectDifference)

Gets the matching score for an object difference. Returns the nr of field differences.

Parameters:

objectDifference - The difference, not null

Returns:

The score

getMatchingScore

protected int getMatchingScore(MapDifference mapDifference)

Gets the matching score for a map difference. Returns the nr of value differences.

Parameters:

mapDifference - The difference, not null

Returns:

The score

getMatchingScore

protected int getMatchingScore(CollectionDifference collectionDifference)

Gets the matching score for a collection difference. Returns the nr of element differences.

Parameters:

collectionDifference - The difference, not null

Returns:

The score

getMatchingScore

protected int getMatchingScore(UnorderedCollectionDifference unorderedCollectionDifference)

Gets the matching score for an unordered collection difference. Returns the sum of the matching scores of the best matches.

Parameters:

unorderedCollectionDifference - The difference, not null

Returns:

The score