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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2355) Allow parameters for comparator
Date Fri, 08 Apr 2011 21:52:05 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017676#comment-13017676
] 

Jonathan Ellis commented on CASSANDRA-2355:
-------------------------------------------

Are there any other uses for comparator options?

If not perhaps this approach is premature generalization.

> Allow parameters for comparator
> -------------------------------
>
>                 Key: CASSANDRA-2355
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2355
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 0.8
>
>         Attachments: Allow-comparators-to-take-arguments-ReversedType.patch
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> Being able to provide arguments to a comparator, to parametrize its behavior, can be
useful.
> For example, a generic ReverseComparator is trivial to write, but without the ability
to provide arguments at the comparator constriction, it cannot be used.
> CASSANDRA-2231 provides another use case for this.
> This ticket proposes to introduce a parser for comparator definition that supports optional
parameters and to introduce a generic ReverseType as a simple example of this.

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