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https://issues.apache.org/jira/browse/JCR-1402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12571402#action_12571402
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Michael Dürig commented on JCR-1402:
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> i am not sure about the IllegalArgumentException
We could also leave the behavior undefined for not normalized paths. However I
think throwing an exception is more explicit and make it easier to detect cases
where some code (inadvertently) relies on such behavior.
> Path.getAncestor and Path.getAncestorCount are misnomers
> --------------------------------------------------------
>
> Key: JCR-1402
> URL: https://issues.apache.org/jira/browse/JCR-1402
> Project: Jackrabbit
> Issue Type: Improvement
> Components: jackrabbit-spi, jackrabbit-spi-commons
> Affects Versions: 1.4
> Reporter: Michael Dürig
> Priority: Minor
> Attachments: path.patch
>
>
> Although the method names refer to ancestors they operate on sub-paths.
> Consider:
> PathFactory pf = PathFactoryImpl.getInstance();
> Path.Element p = pf.getParentElement();
> Path path = pf.create(new Path.Element[]{p, p});
> Path ancestor = path.getAncestor(1);
> assertFalse(ancestor.isAncestorOf(path) )
> This is not what one would expect from looking an the method signatures.
> I suggest to rename getAncestor to getSubPath, clarify the javadoc, and
> deprecate getAncestorCount.
> A patch follows.
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