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https://issues.apache.org/jira/browse/LUCENE-4565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13511315#comment-13511315
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Gilad Barkai commented on LUCENE-4565:
--------------------------------------
Patch's OK, some comments:
* The notion of youngestChild and olderSibling is important. I would not have
removed the 'older/youngest' parts. Especially not from the TaxoArray's API.
But would rather have them everywhere.
* In DirectoryTaxonomyWriter, the loop over the termEnums had been changed to
"reuse" the TermsEnum and DocsEnum - only they are not reused. I got confused
trying to find the reusability. Is there an internal java expert optimization
for such cases?
> Simplify TaxoReader ParentArray/ChildrenArrays
> ----------------------------------------------
>
> Key: LUCENE-4565
> URL: https://issues.apache.org/jira/browse/LUCENE-4565
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Shai Erera
> Assignee: Shai Erera
> Priority: Minor
> Attachments: LUCENE-4565.patch
>
>
> TaxoReader exposes two structures which provide information about a
> categories parent/childs/siblings: ParentArray and ChildrenArrays.
> ChildrenArrays are derived (i.e. created) from ParentArray.
> I propose to consolidate all that into one API ParentInfo, or
> CategoryTreeInfo (a better name?) which will provide the same information,
> only from one object. So instead of making these calls:
> {code}
> int[] parents = taxoReader.getParentArray();
> int[] youngestChilds = taxoReader.getChildrenArrays().getYoungestChildArray();
> int[] olderSiblings = taxoReader.getChildrenArrays().getOlderSiblingArray();
> {code}
> one would make these calls:
> {code}
> int[] parents = taxoReader.getParentInfo().parents();
> int[] youngestChilds = taxoReader.getParentInfo().youngestChilds();
> int[] olderSiblings = taxoReader.getParentInfo().olderSiblings();
> {code}
> Not a big change, just consolidate more code into one logical place. All of
> these arrays will continue to be lazily allocated.
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