org.apache.lucene.index
Class ReaderUtil

java.lang.Object
  org.apache.lucene.index.ReaderUtil

public final class ReaderUtil
extends Object

Common util methods for dealing with IndexReaders and IndexReaderContexts.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Method Summary

static IndexReaderContext	getTopLevelContext(IndexReaderContext context) Walks up the reader tree and return the given context's top level reader context, or in other words the reader tree's root context.
static int	subIndex(int n, int[] docStarts) Returns index of the searcher/reader for document n in the array used to construct this searcher/reader.
static int	subIndex(int n, List<AtomicReaderContext> leaves) Returns index of the searcher/reader for document n in the array used to construct this searcher/reader.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getTopLevelContext

public static IndexReaderContext getTopLevelContext(IndexReaderContext context)

Walks up the reader tree and return the given context's top level reader context, or in other words the reader tree's root context.

subIndex

public static int subIndex(int n,
                           int[] docStarts)

Returns index of the searcher/reader for document n in the array used to construct this searcher/reader.

subIndex

public static int subIndex(int n,
                           List<AtomicReaderContext> leaves)

Returns index of the searcher/reader for document n in the array used to construct this searcher/reader.