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From "Woody Anderson (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-2276) Add IndexReader.document(int, Document, FieldSelector)
Date Wed, 14 Jul 2010 08:45:50 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-2276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Woody Anderson updated LUCENE-2276:
-----------------------------------

    Attachment: LUCENE-2276.patch

This patch adds the document(int,Document,FieldSelector) method to IndexReader.

I had the implementation call document(int,FieldSelector) and then copy the data into the
provided document (if it's not null).
This is not as "good" as having document(int,FS) call document(int, null, FS), but, as all
currently implemented Readers are only bound to implement document(int,FS), which is abstract,
it seemed safest to leave that method abstract rather than introducing a new abstract method.

as such, subclasses can override document((int,doc,fs) for improved object reuse, as is done
for SegmentReader and ParallelReader etc. where they allocate the Doc only if needed.

Unit tests included to validate expected "append to provided doc, if not null" documented
behavior.

> Add IndexReader.document(int, Document, FieldSelector)
> ------------------------------------------------------
>
>                 Key: LUCENE-2276
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2276
>             Project: Lucene - Java
>          Issue Type: Wish
>          Components: Search
>            Reporter: Tim Smith
>         Attachments: LUCENE-2276.patch
>
>
> The Document object passed in would be populated with the fields identified by the FieldSelector
for the specified internal document id
> This method would allow reuse of Document objects when retrieving stored fields from
the index

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