OffHeapFSTStore

java.lang.Object

org.apache.lucene.util.fst.OffHeapFSTStore

All Implemented Interfaces:: Accountable, FSTStore

public final class OffHeapFSTStore extends 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

Description

private static final long

BASE_RAM_BYTES_USED

private IndexInput

in

private long

numBytes

private long

offset

Fields inherited from interface org.apache.lucene.util.Accountable
NULL_ACCOUNTABLE
Constructor Summary

Constructors

Constructor

Description

OffHeapFSTStore()
Method Summary

Modifier and Type

Method

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 Details
- 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 Details
- OffHeapFSTStore
  
  public OffHeapFSTStore()
Method Details
- init
  
  public void init(DataInput in, long numBytes) throws IOException
  
  Specified by:
  
  init in interface FSTStore
  
  Throws:
  
  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 IOException
  
  Specified by:
  
  writeTo in interface FSTStore
  
  Throws:
  
  IOException