Interface ProximityEObjectMatcher.DistanceFunction
- All Known Implementing Classes:
CachingDistance
,EditionDistance
- Enclosing class:
- ProximityEObjectMatcher
public static interface ProximityEObjectMatcher.DistanceFunction
This represent a distance function used by the
computing the distance between two EObjects should be a fast operation or the scalability of the whole matching phase will be poor.
ProximityEObjectMatcher
to compare EObjects and
retrieve the closest EObject from one side to another. Axioms of the distance are supposed to be
respected more especially :
- symetry : dist(a,b) == dist(b,a)
- separation :dist(a,a) == 0
computing the distance between two EObjects should be a fast operation or the scalability of the whole matching phase will be poor.
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Method Summary
Modifier and TypeMethodDescriptionboolean
areIdentic
(Comparison inProgress, EObject a, EObject b) Check that two objects are equals from the distance function point of view (distance should be 0) You should prefer this method when you just want to check objects are not equals enabling the distance to stop sooner.double
distance
(Comparison inProgress, EObject a, EObject b) Return the distance between two EObjects.
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Method Details
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distance
Return the distance between two EObjects. When the two objects should considered as completely different the implementation is expected to return Double.MAX_VALUE.- Parameters:
inProgress
- the comparison being processed right now. This might be used for the distance to retrieve other matches for instance.a
- first object.b
- second object.- Returns:
- the distance between the two EObjects or Double.MAX_VALUE when the objects are considered too different to be the same.
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areIdentic
Check that two objects are equals from the distance function point of view (distance should be 0) You should prefer this method when you just want to check objects are not equals enabling the distance to stop sooner.- Parameters:
inProgress
- the comparison being processed right now. This might be used for the distance to retrieve other matches for instance.a
- first object.b
- second object.- Returns:
- true of the two objects are equals, false otherwise.
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