| Class | Description |
|---|---|
| BufferedIndexInput | Base implementation class for buffered {@link IndexInput}. |
| BufferedIndexOutput | Base implementation class for buffered {@link IndexOutput}. |
| Directory | |
| FSDirectory | Straightforward implementation of {@link Directory} as a directory of files. |
| FSIndexInput | |
| IndexInput | Abstract base class for input from a file in a {@link Directory}. A random-access input stream. Used for all Lucene index input operations. |
| IndexOutput | Abstract base class for output to a file in a Directory. A random-access output stream. Used for all Lucene index output operations. |
| InputStream | |
| Lock | |
| Lock.With | Utility class for executing code with exclusive access. |
| MMapDirectory | |
| OutputStream | |
| RAMDirectory | A memory-resident {@link Directory} implementation. |
| RAMOutputStream | A memory-resident {@link IndexOutput} implementation. |