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https://issues.apache.org/jira/browse/MAHOUT-664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13037272#comment-13037272
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Deneche A. Hakim commented on MAHOUT-664:
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I will have to take a closer look to the watchmaker code, but for df I know I
used StringUtils to serialize some implementation of TreeBuilder, for now it's
just DefaultTreeBuilder but it can be a custom implementation too.
> Remove usage of XStream string serialization too?
> -------------------------------------------------
>
> Key: MAHOUT-664
> URL: https://issues.apache.org/jira/browse/MAHOUT-664
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.4, 0.5
> Reporter: Sean Owen
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 0.6
>
>
> In the spirit of MAHOUT-510 and continuing to standardize approaches without
> going too nuts -- I notice that there is only one use of XStream left in the
> code, in StringUtils, which is merely a wrapper for serializing/deserializing
> an object to a String.
> There are two key mahout-core usages:
> - org.apache.mahout.ga.watchmaker. Here it seems to be used to
> serialize/deserialize a candidate solution to a file on HDFS and fed into a
> mapper. Surely it's more appropriate to do something with Writable here?
> - org.apache.mahout.df.mapreduce. It's used to serialize/deserialize a
> DefaultTreeBuilder. Does it need to be done? it seems like DefaultTreeBuilder
> is parameterized entirely by its param "m" but I haven't looked hard.
> All of the other usages are in mahout-examples/, which suggests they're of
> secondary importance.
> Some usages are serialization of longs and char[], which seems pointless.
> Any thoughts? putting this on the map for 1.0.
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