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From "Yonik Seeley (JIRA)" <>
Subject [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet for matching docs
Date Fri, 17 Sep 2010 19:35:32 GMT


Yonik Seeley commented on LUCENE-2649:

bq. How would that work?

We could start off simple - add only recordMissing functionallity and punt on the rest, while
still leaving a place to add it.

class FieldCache {

  public static class EntryCreator {
    public boolean recordMissing() {
      return false;
    public abstract Parser getParser();

Not even sure if a whole hierarchy is needed at this point... in the future, we'd prob want

  public static EntryCreatorInt extends EntryCreator {
    public IntValues getIntValues(IndexReader reader, String field) {... code currently in
FieldCacheImpl that fills the fieldCahe...}

> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>                 Key: LUCENE-2649
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Ryan McKinley
>             Fix For: 4.0
>         Attachments: LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch,
> The FieldCache returns an array representing the values for each doc.  However there
is no way to know if the doc actually has a value.
> This should be changed to return an object representing the values *and* a BitSet for
all valid docs.

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