[jira] [Resolved] (UIMA-5346) sort compare method not following contract, sometimes get IllegalArgExcptn

["Marshall Schor (JIRA)" <de...@uima.apache.org>]

     [ https://issues.apache.org/jira/browse/UIMA-5346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marshall Schor resolved UIMA-5346.
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    Resolution: Fixed

> sort compare method not following contract, sometimes get IllegalArgExcptn
> --------------------------------------------------------------------------
>
>                 Key: UIMA-5346
>                 URL: https://issues.apache.org/jira/browse/UIMA-5346
>             Project: UIMA
>          Issue Type: Bug
>          Components: Core Java Framework
>            Reporter: Marshall Schor
>            Assignee: Marshall Schor
>             Fix For: 3.0.0SDK-alpha02
>
>
> BinaryCasSerDes6 has a method used for sort comparison.  At one point in testing, a test case threw an IllegalArgumentException from TimSort, one of the implementations of sort in Java, where it determined some invalid state due to the sortCompare not obeying the contract.
> This could be due to equals(fs1, fs2) == false and sortCompare(fs1, fs2) == 0.
> Fix this in two places: Add equals method for FeatureStructureImplC that returns 0 if the _id fields are the same.  This matches the hashcode for that.
> Change the sortCompare function to only return 0 if the id's are the same.



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