moveTo() and iterator(fs) do not point to "leftmost" FS
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Key: UIMA-1601
URL: https://issues.apache.org/jira/browse/UIMA-1601
Project: UIMA
Issue Type: Bug
Components: Core Java Framework
Affects Versions: 2.2.2
Reporter: Timo Boehme
According to the API docs FSIterator.moveTo(FeatureStructure fs) should move
the iterator to "the first features structure that is equal to fs". In case we
have multiple annotations of same type and same region (same start/end) as fs
moveTo() will point to one of them but not necessarily to the first (leftmost)
one (in iterator order).
The inconsistency to the API doc is even more clear with
FSIndex.iterator(FeatureStructure fs). The API doc states: "The position of the
iterator will be set such that the feature structure returned by a call to the
iterator's get() method is greater than or equal to fs, and any previous FS is
less than FS." Thus if we have multiple annotations of same type as fs and same
region one would expect the iterator to start with the left most one and return
all of these annotations using next(). However as with moveTo() this is not the
case. E.g. after iterator creation calling moveToPrevious() followed by get()
returns sometimes one of the annotations with same region as fs (and same type).
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