[jira] [Created] (UIMA-3913) (J)CasUtil methods could be more generic

["Hugo Mougard (JIRA)" <de...@uima.apache.org>]

Hugo Mougard created UIMA-3913:
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             Summary: (J)CasUtil methods could be more generic
                 Key: UIMA-3913
                 URL: https://issues.apache.org/jira/browse/UIMA-3913
             Project: UIMA
          Issue Type: Improvement
          Components: uimaFIT
            Reporter: Hugo Mougard
            Priority: Minor


As an example, the method {{indexCovering}} of {{JCasUtil}} has signature:
{code}
public static <T extends Annotation,S extends Annotation> Map<T,Collection<S>> indexCovering(
  JCas jCas,
  Class<T> type,
  Class<S> coveringType)
{code}
With this signature, the following code is invalid ({{RevisedSentence}} is a subclass of {{Sentence}}):

{code}
Map<RevisedWords, Collection<Sentence>> indexRevised
                = JCasUtil.indexCovering(
                        revised,
                        RevisedWords.class,
                        RevisedSentence.class);
{code}
This somewhat prevents users of {{JCasUtil}} from benefiting of all the OOP pluses of the UIMA TS.

Here would be a signature that would maybe better fit the problem:
{code}
public static <U extends Annotation, V extends U, S extends Annotation, T extends S> Map<S,Collection<U>> indexCovering(
  JCas jCas,
  Class<T> type,
  Class<V> coveringType)
{code}




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