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https://issues.apache.org/jira/browse/ACCUMULO-2490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13939480#comment-13939480
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Bill Havanki commented on ACCUMULO-2490:
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Reverting is a good idea. Both Effective Java and Angelika Langer's FAQ say to
not use wildcards for return types.
This item is relevant to the discussion:
http://www.angelikalanger.com/GenericsFAQ/FAQSections/TypeParameters.html#FAQ107
Basically you can't use "super" for type parameters of methods, which is such a
pain here. The best bet may be to supply a static method; see the "addToMap"
workaround in the item for the idea.
> Pair.fromEntry should accept bounded wild card parameters
> ---------------------------------------------------------
>
> Key: ACCUMULO-2490
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2490
> Project: Accumulo
> Issue Type: Improvement
> Components: client
> Reporter: Mike Drob
> Assignee: Christopher Tubbs
> Priority: Minor
> Labels: API, newbie
> Fix For: 1.7.0
>
>
> The following \[psuedo-]code should be legal:
> {code}
> Entry<Integer, String> entry = new Entry(10, "IO")
> Pair<Object,Object> pair = Pair.fromEntry(entry)
> {code}
> This is possible if we replace the generic parameters with bounded wild cards.
> (Effective Java SE; Item 28)
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