org.apache.lucene.store.db

Class DbIndexOutput

java.lang.Object

org.apache.lucene.store.IndexOutput

org.apache.lucene.store.db.DbIndexOutput

public class DbIndexOutput
extends IndexOutput

Field Summary

Fields

Modifier and Type	Field and Description
protected Block	block
static int	BLOCK_LEN
static int	BLOCK_MASK
static int	BLOCK_SHIFT The size of data blocks, currently 16k (2^14), is determined by this constant.
protected DbDirectory	directory
protected File	file
protected long	length
protected long	position

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DbIndexOutput(DbDirectory directory, java.lang.String name, boolean create)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes this stream to further operations.
void	flush() Forces any buffered output to be written.
long	getFilePointer() Returns the current position in this file, where the next write will occur.
long	length() The number of bytes in the file.
void	seek(long pos) Sets current position in this file, where the next write will occur.
void	writeByte(byte b) Writes a single byte.
void	writeBytes(byte[] b, int offset, int len) Writes an array of bytes.

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

copyBytes, setLength, writeBytes, writeChars, writeChars, writeInt, writeLong, writeString, writeStringStringMap, writeVInt, writeVLong

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_SHIFT

public static final int BLOCK_SHIFT

The size of data blocks, currently 16k (2^14), is determined by this constant.

See Also:

Constant Field Values

BLOCK_LEN

public static final int BLOCK_LEN

See Also:

Constant Field Values

BLOCK_MASK

public static final int BLOCK_MASK

See Also:

Constant Field Values

position

protected long position

length

protected long length

directory

protected DbDirectory directory

block

protected Block block

file

protected File file

Constructor Detail

DbIndexOutput

protected DbIndexOutput(DbDirectory directory,
             java.lang.String name,
             boolean create)
                 throws java.io.IOException

Throws:

java.io.IOException

Method Detail

close

public void close()
           throws java.io.IOException

Description copied from class: IndexOutput

Closes this stream to further operations.

Specified by:

close in class IndexOutput

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Description copied from class: IndexOutput

Forces any buffered output to be written.

Specified by:

flush in class IndexOutput

Throws:

java.io.IOException

writeByte

public void writeByte(byte b)
               throws java.io.IOException

Description copied from class: IndexOutput

Writes a single byte.

Specified by:

writeByte in class IndexOutput

Throws:

java.io.IOException

See Also:

IndexInput.readByte()

writeBytes

public void writeBytes(byte[] b,
              int offset,
              int len)
                throws java.io.IOException

Description copied from class: IndexOutput

Writes an array of bytes.

Specified by:

writeBytes in class IndexOutput

Parameters:

b - the bytes to write

offset - the offset in the byte array

len - the number of bytes to write

Throws:

java.io.IOException

See Also:

IndexInput.readBytes(byte[],int,int)

length

public long length()
            throws java.io.IOException

Description copied from class: IndexOutput

The number of bytes in the file.

Specified by:

length in class IndexOutput

Throws:

java.io.IOException

seek

public void seek(long pos)
          throws java.io.IOException

Description copied from class: IndexOutput

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

Specified by:

seek in class IndexOutput

Throws:

java.io.IOException

See Also:

IndexOutput.getFilePointer()

getFilePointer

public long getFilePointer()

Description copied from class: IndexOutput

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

Specified by:

getFilePointer in class IndexOutput

See Also:

IndexOutput.seek(long)