```
public final class ReaderUtil
extends java.lang.Object
```
Common util methods for dealing with IndexReaders and IndexReaderContexts.

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`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, java.util.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
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Class ReaderUtil