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Date: Sat, 2 Jun 2012 18:09:23 +0000 (UTC)
From: "Michael McCandless (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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Subject: [jira] [Commented] (LUCENE-3312) Break out StorableField from
 IndexableField
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    [ https://issues.apache.org/jira/browse/LUCENE-3312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287987#comment-13287987 ] 

Michael McCandless commented on LUCENE-3312:
--------------------------------------------

{quote}
Separately, I think even for 4.0 we should remove XXXField.TYPE_STORED
 from all the sugar fields (TextField, StringField, etc.); expert users
 can always make a custom Indexable/Storable/Field/FieldType that both
 stores & indexes...
{quote}

I opened a new issue for this: LUCENE-4101.

Nikola, before you modify any of the tests for this issue you might want to wait for me to commit & forward port to 5.0 else there will be a lot of conflicts!
                
> Break out StorableField from IndexableField
> -------------------------------------------
>
>                 Key: LUCENE-3312
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3312
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/index
>            Reporter: Michael McCandless
>            Assignee: Nikola Tankovic
>              Labels: gsoc2012, lucene-gsoc-12
>             Fix For: Field Type branch
>
>         Attachments: lucene-3312-patch-01.patch, lucene-3312-patch-02.patch, lucene-3312-patch-03.patch, lucene-3312-patch-04.patch
>
>
> In the field type branch we have strongly decoupled
> Document/Field/FieldType impl from the indexer, by having only a
> narrow API (IndexableField) passed to IndexWriter.  This frees apps up
> use their own "documents" instead of the "user-space" impls we provide
> in oal.document.
> Similarly, with LUCENE-3309, we've done the same thing on the
> doc/field retrieval side (from IndexReader), with the
> StoredFieldsVisitor.
> But, maybe we should break out StorableField from IndexableField,
> such that when you index a doc you provide two Iterables -- one for the
> IndexableFields and one for the StorableFields.  Either can be null.
> One downside is possible perf hit for fields that are both indexed &
> stored (ie, we visit them twice, lookup their name in a hash twice,
> etc.).  But the upside is a cleaner separation of concerns in API....

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