[jira] Commented: (LUCENE-2276) Add IndexReader.document(int, Document, FieldSelector)

["Tim Smith (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12888323#action_12888323 ] 

Tim Smith commented on LUCENE-2276:
-----------------------------------

instead of doing the following everywhere:
{code}
final Document doc(int n, FieldSelector fieldSelector) throws CorruptIndexException, IOException {
   return doc(n, null, fieldSelector); 
}
{code}

you could do:
{code}
final Document doc(int n, FieldSelector fieldSelector) throws CorruptIndexException, IOException {
   return doc(n, new Document(), fieldSelector); 
}
{code}

then, the interface for doc(int, Document, FieldSelector) can state that the document must not be null, and can skip the if null, new Document check later on



> 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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