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https://issues.apache.org/jira/browse/LUCENE-2831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12974665#action_12974665
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Yonik Seeley commented on LUCENE-2831:
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Remember that we may be dealing with a tree with a depth > 2, so If we want to
preserve maximum information, we may want something like this:
{code}
public static final class ReaderInfo {
public final IndexReader reader;
/** the reader info for this reader's immediate parent, or null if none */
public final ReaderInfo parent;
/** the ord of this reader in the parent */
public final int ordInParent;
/** the offset of this reader in the parent */
public final int offsetInParent;
/** the ord of this reader in the top level reader */
public final int ord;
/** the offset of this reader in the top level reader */
public final int offset;
{code}
> Revise Weight#scorer & Filter#getDocIdSet API to pass Readers context
> ---------------------------------------------------------------------
>
> Key: LUCENE-2831
> URL: https://issues.apache.org/jira/browse/LUCENE-2831
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Fix For: 4.0
>
> Attachments: LUCENE-2831.patch
>
>
> Spinoff from LUCENE-2694 - instead of passing a reader into Weight#scorer(IR,
> boolean, boolean) we should / could revise the API and pass in a struct that
> has parent reader, sub reader, ord of that sub. The ord mapping plus the
> context with its parent would make several issues way easier. See
> LUCENE-2694, LUCENE-2348 and LUCENE-2829 to name some.
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