org.apache.mahout.text

Class ReadOnlyFileSystemDirectory

java.lang.Object

org.apache.lucene.store.Directory

org.apache.mahout.text.ReadOnlyFileSystemDirectory

All Implemented Interfaces:

Closeable, AutoCloseable

public class ReadOnlyFileSystemDirectory
extends org.apache.lucene.store.Directory

This class implements a read-only Lucene Directory on top of a general FileSystem. Currently it does not support locking.

// TODO: Rename to FileSystemReadOnlyDirectory

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.store.Directory

org.apache.lucene.store.Directory.IndexInputSlicer

Field Summary

Fields inherited from class org.apache.lucene.store.Directory

isOpen, lockFactory

Constructor Summary

Constructors

Constructor and Description
ReadOnlyFileSystemDirectory(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path directory, boolean create, org.apache.hadoop.conf.Configuration conf) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
org.apache.lucene.store.IndexOutput	createOutput(String name, org.apache.lucene.store.IOContext context)
void	deleteFile(String name)
boolean	fileExists(String name)
long	fileLength(String name)
String[]	list()
String[]	listAll()
org.apache.lucene.store.Lock	makeLock(String name)
org.apache.lucene.store.IndexInput	openInput(String name, org.apache.lucene.store.IOContext context)
void	sync(Collection<String> names)
String	toString()

Methods inherited from class org.apache.lucene.store.Directory

clearLock, copy, createSlicer, ensureOpen, getLockFactory, getLockID, setLockFactory

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReadOnlyFileSystemDirectory

public ReadOnlyFileSystemDirectory(org.apache.hadoop.fs.FileSystem fs,
                           org.apache.hadoop.fs.Path directory,
                           boolean create,
                           org.apache.hadoop.conf.Configuration conf)
                            throws IOException

Constructor

Parameters:

fs -

directory -

create -

conf -

Throws:

IOException

Method Detail

list

public String[] list()
              throws IOException

Throws:

IOException

listAll

public String[] listAll()
                 throws IOException

Specified by:

listAll in class org.apache.lucene.store.Directory

Throws:

IOException

fileExists

public boolean fileExists(String name)
                   throws IOException

Specified by:

fileExists in class org.apache.lucene.store.Directory

Throws:

IOException

fileLength

public long fileLength(String name)
                throws IOException

Specified by:

fileLength in class org.apache.lucene.store.Directory

Throws:

IOException

deleteFile

public void deleteFile(String name)
                throws IOException

Specified by:

deleteFile in class org.apache.lucene.store.Directory

Throws:

IOException

createOutput

public org.apache.lucene.store.IndexOutput createOutput(String name,
                                               org.apache.lucene.store.IOContext context)
                                                 throws IOException

Specified by:

createOutput in class org.apache.lucene.store.Directory

Throws:

IOException

sync

public void sync(Collection<String> names)
          throws IOException

Specified by:

sync in class org.apache.lucene.store.Directory

Throws:

IOException

openInput

public org.apache.lucene.store.IndexInput openInput(String name,
                                           org.apache.lucene.store.IOContext context)
                                             throws IOException

Specified by:

openInput in class org.apache.lucene.store.Directory

Throws:

IOException

makeLock

public org.apache.lucene.store.Lock makeLock(String name)

Overrides:

makeLock in class org.apache.lucene.store.Directory

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class org.apache.lucene.store.Directory

Throws:

IOException

toString

public String toString()

Overrides:

toString in class org.apache.lucene.store.Directory