## Uses of Class
org.apache.lucene.store.FSDirectory

- Packages that use FSDirectory
  Package | Description
  --- | ---
  org.apache.lucene.store | Binary i/o API, used for all index data.
  org.apache.lucene.util | Some utility classes.

- - ### Uses of FSDirectory in org.apache.lucene.store

    Subclasses of FSDirectory in org.apache.lucene.store
    Modifier and Type | Class and Description
    --- | ---
    `class` | `MMapDirectory` File-based `Directory` implementation that uses mmap for reading, and `FSDirectory.FSIndexOutput` for writing.
    `class` | `NIOFSDirectory` An `FSDirectory` implementation that uses java.nio's FileChannel's positional read, which allows multiple threads to read from the same file without synchronizing.
    `class` | `SimpleFSDirectory` A straightforward implementation of `FSDirectory` using `Files.newByteChannel(Path, java.nio.file.OpenOption...)`.

    Methods in org.apache.lucene.store that return FSDirectory
    Modifier and Type | Method and Description
    --- | ---
    `static FSDirectory` | FSDirectory.`open(Path path)` Creates an FSDirectory instance, trying to pick the best implementation given the current environment.
    `static FSDirectory` | FSDirectory.`open(Path path, LockFactory lockFactory)` Just like `open(Path)`, but allows you to also specify a custom `LockFactory`.

    Methods in org.apache.lucene.store with parameters of type FSDirectory
    Modifier and Type | Method and Description
    --- | ---
    `protected abstract Lock` | FSLockFactory.`obtainFSLock(FSDirectory dir, String lockName)` Implement this method to obtain a lock for a FSDirectory instance.
    `protected Lock` | NativeFSLockFactory.`obtainFSLock(FSDirectory dir, String lockName)`
    `protected Lock` | SimpleFSLockFactory.`obtainFSLock(FSDirectory dir, String lockName)`

    Constructors in org.apache.lucene.store with parameters of type FSDirectory
    Constructor and Description
    `RAMDirectory(FSDirectory dir, IOContext context)` Creates a new `RAMDirectory` instance from a different `Directory` implementation.

  - ### Uses of FSDirectory in org.apache.lucene.util

    Methods in org.apache.lucene.util that return FSDirectory
    Modifier and Type | Method and Description
    --- | ---
    `static FSDirectory` | CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path)` Creates a new specific FSDirectory instance
    `static FSDirectory` | CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path, LockFactory lf)` Creates a new specific FSDirectory instance
    `static FSDirectory` | CommandLineUtil.`newFSDirectory(String clazzName, Path path)` Creates a specific FSDirectory instance starting from its class name, using the default lock factory
    `static FSDirectory` | CommandLineUtil.`newFSDirectory(String clazzName, Path path, LockFactory lf)` Creates a specific FSDirectory instance starting from its class name

    Methods in org.apache.lucene.util that return types with arguments of type FSDirectory
    Modifier and Type | Method and Description
    --- | ---
    `static Class<? extends FSDirectory>` | CommandLineUtil.`loadFSDirectoryClass(String clazzName)` Loads a specific FSDirectory implementation

    Method parameters in org.apache.lucene.util with type arguments of type FSDirectory
    Modifier and Type | Method and Description
    --- | ---
    `static FSDirectory` | CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path)` Creates a new specific FSDirectory instance
    `static FSDirectory` | CommandLineUtil.`newFSDirectory(Class<? extends FSDirectory> clazz, Path path, LockFactory lf)` Creates a new specific FSDirectory instance

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