org.apache.lucene.store

Class IndexOutput

java.lang.Object

org.apache.lucene.store.DataOutput

org.apache.lucene.store.IndexOutput

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

OutputStreamIndexOutput, RAMOutputStream

public abstract class IndexOutput
extends DataOutput
implements Closeable

Abstract base class for output to a file in a Directory. A random-access output stream. Used for all Lucene index output operations.

IndexOutput may only be used from one thread, because it is not thread safe (it keeps internal state like file position).

See Also:

Directory, IndexInput

Constructor Summary

Constructors

Constructor and Description
IndexOutput()

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	close() Closes this stream to further operations.
abstract void	flush() Deprecated. Lucene never calls this method.
abstract long	getChecksum() Returns the current checksum of bytes written so far
abstract long	getFilePointer() Returns the current position in this file, where the next write will occur.
long	length() Deprecated. Use getFilePointer() instead; this method will be removed in Lucene5.0.

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

copyBytes, writeByte, writeBytes, writeBytes, writeInt, writeLong, writeShort, writeString, writeStringSet, writeStringStringMap, writeVInt, writeVLong, writeZInt, writeZLong

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexOutput

public IndexOutput()

Method Detail

flush

@Deprecated
public abstract void flush()
                    throws IOException

Deprecated. Lucene never calls this method.

Forces any buffered output to be written.

Throws:

IOException

close

public abstract void close()
                    throws IOException

Closes this stream to further operations.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

getFilePointer

public abstract long getFilePointer()

Returns the current position in this file, where the next write will occur.

getChecksum

public abstract long getChecksum()
                          throws IOException

Returns the current checksum of bytes written so far

Throws:

IOException

length

@Deprecated
public long length()
            throws IOException

Deprecated. Use getFilePointer() instead; this method will be removed in Lucene5.0.

The number of bytes in the file.

Throws:

IOException