org.apache.lucene.codecs.uniformsplit

Class FSTDictionary.Builder

java.lang.Object

org.apache.lucene.codecs.uniformsplit.FSTDictionary.Builder

All Implemented Interfaces:

IndexDictionary.Builder

Enclosing class:

FSTDictionary

public static class FSTDictionary.Builder
extends java.lang.Object
implements IndexDictionary.Builder

Builds an immutable FSTDictionary.

Field Summary

Fields

Modifier and Type	Field and Description
protected <any>	fstBuilder
protected IntsRefBuilder	scratchInts

Constructor Summary

Constructors

Constructor and Description
Builder()

Method Summary

Modifier and Type	Method and Description
void	add(BytesRef blockKey, long blockFilePointer) Adds a [block key - block file pointer] entry to the dictionary.
FSTDictionary	build()

Methods inherited from class java.lang.Object

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

Field Detail

fstBuilder

protected final <any> fstBuilder

scratchInts

protected final IntsRefBuilder scratchInts

Constructor Detail

Builder

public Builder()

Method Detail

add

public void add(BytesRef blockKey,
                long blockFilePointer)

Description copied from interface: IndexDictionary.Builder

Adds a [block key - block file pointer] entry to the dictionary.

The Uniform Split technique adds block keys in the dictionary. See BlockReader and TermBytes for more info about block key and minimal distinguishing prefix (MDP).

All block keys are added in strictly increasing order of the block file pointers, this allows long encoding optimizations such as with org.apache.lucene.util.fst.PositiveIntOutputs for org.apache.lucene.util.fst.FST.

Specified by:

add in interface IndexDictionary.Builder

Parameters:

blockKey - The block key which is the minimal distinguishing prefix (MDP) of the first term of a block.

blockFilePointer - Non-negative file pointer to the start of the block in the block file.

build

public FSTDictionary build()

Specified by:

build in interface IndexDictionary.Builder