Class CachingDistance
- java.lang.Object
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- org.eclipse.emf.compare.match.eobject.CachingDistance
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- All Implemented Interfaces:
ProximityEObjectMatcher.DistanceFunction
public class CachingDistance extends Object implements ProximityEObjectMatcher.DistanceFunction
This class wraps a DistanceFunction and cache its result. Any call to distance(a,b) will be cached and the same value will be returned to distance(b,a).- Since:
- 3.1
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Constructor Summary
Constructors Constructor Description CachingDistance(ProximityEObjectMatcher.DistanceFunction wrapped)
Create a new caching distance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
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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Constructor Detail
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CachingDistance
public CachingDistance(ProximityEObjectMatcher.DistanceFunction wrapped)
Create a new caching distance.- Parameters:
wrapped
- actual distance function to cache results from.
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Method Detail
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distance
public double distance(Comparison inProgress, EObject a, EObject b)
Return the distance between two EObjects. When the two objects should considered as completely different the implementation is expected to return Double.MAX_VALUE.- Specified by:
distance
in interfaceProximityEObjectMatcher.DistanceFunction
- 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
public boolean 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.- Specified by:
areIdentic
in interfaceProximityEObjectMatcher.DistanceFunction
- 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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