Package org.apache.lucene.util.fst
Class OnHeapFSTStore
- java.lang.Object
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- org.apache.lucene.util.fst.OnHeapFSTStore
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- All Implemented Interfaces:
Accountable
,FSTStore
public final class OnHeapFSTStore extends java.lang.Object implements FSTStore
Provides storage of finite state machine (FST), using byte array or byte store allocated on heap.
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Field Summary
Fields Modifier and Type Field Description private static long
BASE_RAM_BYTES_USED
private BytesStore
bytes
ABytesStore
, used during building, or during reading when the FST is very large (more than 1 GB).private byte[]
bytesArray
Used at read time when the FST fits into a single byte[].private int
maxBlockBits
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Constructor Summary
Constructors Constructor Description OnHeapFSTStore(int maxBlockBits)
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Method Summary
All Methods Instance Methods Concrete Methods 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)
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.lucene.util.Accountable
getChildResources
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Field Detail
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BASE_RAM_BYTES_USED
private static final long BASE_RAM_BYTES_USED
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bytes
private BytesStore bytes
ABytesStore
, used during building, or during reading when the FST is very large (more than 1 GB). If the FST is less than 1 GB then bytesArray is set instead.
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bytesArray
private byte[] bytesArray
Used at read time when the FST fits into a single byte[].
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maxBlockBits
private final int maxBlockBits
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Method Detail
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init
public void init(DataInput in, long numBytes) throws java.io.IOException
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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 interfaceAccountable
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getReverseBytesReader
public FST.BytesReader getReverseBytesReader()
- Specified by:
getReverseBytesReader
in interfaceFSTStore
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writeTo
public void writeTo(DataOutput out) throws java.io.IOException
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