public Analyzer getAnalyzer(String name)
Experimental API
retrieve an analyzer instance by its definition name

 public Analyzer getAnalyzer(Class clazz)
Retrieves the scoped analyzer for a given class.

 public DirectoryProvider[] getDirectoryProviders(Class entity)
Provide access to the DirectoryProviders (hence the Lucene Directories)
for a given entity
In most cases, the returned type will be a one element array.
But if the given entity is configured to use sharded indexes, then multiple
elements will be returned. In this case all of them should be considered.

 public ReaderProvider getReaderProvider()
Provide the configured readerProvider strategy,
hence access to a Lucene IndexReader

 public  void optimize()
Optimize all indexes

 public  void optimize(Class entityType)
Optimize the index holding entityType