## org.apache.lucene.search
Class QueryUtils.FCInvisibleMultiReader

    java.lang.Object
      org.apache.lucene.index.IndexReader
          org.apache.lucene.index.CompositeReader
              org.apache.lucene.index.BaseCompositeReader<IndexReader>
                  org.apache.lucene.index.MultiReader
                      org.apache.lucene.search.QueryUtils.FCInvisibleMultiReader

All Implemented Interfaces:
  Closeable

Enclosing class:
  QueryUtils

    public static class QueryUtils.FCInvisibleMultiReader

extends MultiReader

This is a MultiReader that can be used for randomly wrapping other readers without creating FieldCache insanity. The trick is to use an opaque/fake cache key.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.IndexReader
`IndexReader.ReaderClosedListener`

Constructor Summary
`QueryUtils.FCInvisibleMultiReader(IndexReader... readers)`

Method Summary
`Object` `getCombinedCoreAndDeletesKey()`
`Object` `getCoreCacheKey()`

Methods inherited from class org.apache.lucene.index.MultiReader
`doClose`

Methods inherited from class org.apache.lucene.index.BaseCompositeReader
`docFreq, document, getSequentialSubReaders, getTermVectors, hasDeletions, maxDoc, numDocs, readerBase, readerIndex, totalTermFreq`

Methods inherited from class org.apache.lucene.index.CompositeReader
`getContext, toString`

Methods inherited from class org.apache.lucene.index.IndexReader
`addReaderClosedListener, close, decRef, document, document, ensureOpen, equals, getRefCount, getTermVector, hashCode, incRef, leaves, numDeletedDocs, open, open, open, open, open, registerParentReader, removeReaderClosedListener, tryIncRef`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Constructor Detail

### QueryUtils.FCInvisibleMultiReader

    public QueryUtils.FCInvisibleMultiReader(IndexReader... readers)

Method Detail

### getCoreCacheKey

    public Object getCoreCacheKey()

  Overrides:
    `getCoreCacheKey` in class `IndexReader`

### getCombinedCoreAndDeletesKey

    public Object getCombinedCoreAndDeletesKey()

  Overrides:
    `getCombinedCoreAndDeletesKey` in class `IndexReader`

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