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https://issues.apache.org/jira/browse/MAHOUT-480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12917362#action_12917362
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Eugen Paraschiv commented on MAHOUT-480:
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I fully understand your concern about inconsistent state, especially from a
conceptual point of view. I will open JIRA issues for mahout-math,
mahout-examples and mahout-utils and will provide similar patches for them if
that is OK.
>From the API perspective, this kind of cross cutting concern is less of a
>problem, as the guava checks are perfectly aligned with the manual checks that
>are in place now, meaning that the type of exception thrown is the same, so
>incremental changes are less of a problem.
So, now that mahout-core is covered, please tell me how I should go about
creating the other JIRA issues so that I can continue with this.
Thanks.
> Replace manual precondition checking with Precondition utility class from
> Guava
> -------------------------------------------------------------------------------
>
> Key: MAHOUT-480
> URL: https://issues.apache.org/jira/browse/MAHOUT-480
> Project: Mahout
> Issue Type: Improvement
> Components: Clustering
> Affects Versions: 0.3
> Reporter: Eugen Paraschiv
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 0.4
>
> Attachments: MAHOUT-480.patch, MAHOUT-480_v3.patch
>
>
> Replace manual precondition checking with the Precondition class. This will
> affect the following classes:
> FileDataModel
> MemoryDiffStorage
> SlopeOneRecommender
> FileDiffStorage
> AbstractJDBCDiffStorage
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