org.apache.lucene.util.fst

Class OffHeapFSTStore

java.lang.Object

org.apache.lucene.util.fst.OffHeapFSTStore

All Implemented Interfaces:

Accountable, FSTStore

public final class OffHeapFSTStore
extends java.lang.Object
implements FSTStore

Provides off heap storage of finite state machine (FST), using underlying index input instead of byte store on heap

Field Summary

Fields

Modifier and Type	Field and Description
private static long	BASE_RAM_BYTES_USED
private IndexInput	in
private long	numBytes
private long	offset

Constructor Summary

Constructors

Constructor and Description
OffHeapFSTStore()

Method Summary

Modifier and Type	Method and Description
FST.BytesReader	getReverseBytesReader()
void	init(DataInput in, long numBytes)
long	ramBytesUsed() Return the memory usage of this object in bytes.
long	size()
void	writeTo(DataOutput out)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Field Detail

BASE_RAM_BYTES_USED

private static final long BASE_RAM_BYTES_USED

in

private IndexInput in

offset

private long offset

numBytes

private long numBytes

Constructor Detail

OffHeapFSTStore

public OffHeapFSTStore()

Method Detail

init

public void init(DataInput in,
                 long numBytes)
          throws java.io.IOException

Specified by:

init in interface FSTStore

Throws:

java.io.IOException

ramBytesUsed

public long ramBytesUsed()

Description copied from interface: Accountable

Return the memory usage of this object in bytes. Negative values are illegal.

Specified by:

ramBytesUsed in interface Accountable

size

public long size()

Specified by:

size in interface FSTStore

getReverseBytesReader

public FST.BytesReader getReverseBytesReader()

Specified by:

getReverseBytesReader in interface FSTStore

writeTo

public void writeTo(DataOutput out)
             throws java.io.IOException

Specified by:

writeTo in interface FSTStore

Throws:

java.io.IOException