[jira] Commented: (MAHOUT-441) File-backed IDMigrator

["Sean Owen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889499#action_12889499 ] 

Sean Owen commented on MAHOUT-441:
----------------------------------

Can you post the file UpdatableIDMigrator? The patch shows it as an update but it's a new file and it won't apply. I can't figure out the content from the patch.

The rest is OK -- might see if you can configure the IDE to not change whitespace, and, watch out for the copyright headers. I can adjust this locally.

> File-backed IDMigrator
> ----------------------
>
>                 Key: MAHOUT-441
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-441
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Collaborative Filtering
>            Reporter: Sebastian Schelter
>         Attachments: MAHOUT-441.patch
>
>
> To complete taste's suite of file-related implementations (currently FileDataModel and FileItemSimilarity) I created an IDMigrator backed by a file. It can be refreshed and will reload it's data into memory in the same way FileDataModel and FileItemSimilarity are already doing this.
> I couldn't prevent having to split up the IDMigrator interface into 2 separate interfaces because the update methods (like storeMapping(...) and initialize(...)) did not fit in the concept of reloading data from an external source, hope that's ok.

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