org.terrier.structures.indexing

Class BlockFieldDocumentPostingList

java.lang.Object

org.terrier.structures.indexing.DocumentPostingList

org.terrier.structures.indexing.FieldDocumentPostingList

org.terrier.structures.indexing.BlockFieldDocumentPostingList

All Implemented Interfaces:

org.apache.hadoop.io.Writable

public class BlockFieldDocumentPostingList
extends FieldDocumentPostingList

BlockFieldDocumentPostingList class

Nested Class Summary

Nested classes/interfaces inherited from class org.terrier.structures.indexing.DocumentPostingList

DocumentPostingList.postingIterator

Field Summary

Fields

Modifier and Type	Field and Description
protected int	blockCount number of blocks in this document.
protected gnu.trove.THashMap<String,gnu.trove.TIntHashSet>	term_blocks mapping term to blockids in this document

Fields inherited from class org.terrier.structures.indexing.FieldDocumentPostingList

field_occurrences, fieldCount, fieldLengths

Fields inherited from class org.terrier.structures.indexing.DocumentPostingList

AVG_DOCUMENT_UNIQUE_TERMS, documentLength, occurrences

Constructor Summary

Constructors

Constructor and Description
BlockFieldDocumentPostingList(int NUM_FIELDS) Constructs an instance of BlockFieldDocumentPostingList.

Method Summary

Methods

Modifier and Type	Method and Description
int[]	getBlocks(String term) Get the blocks for the specified term
int[][]	getPostings() returns the postings suitable to be written into the block direct index
void	insert(int tf, String t, int[] fieldIds, int blockId) Insert a term into this document tf times, occurs at given block id, and in the given fields
void	insert(String t, int[] fieldIds, int blockId) Insert a term into this document, occurs at given block id, and in the given fields
void	insert(String t, int fieldId, int blockId) Insert a term into this document, occurs at given block id, and in the given field
protected IterablePosting	makePostingIterator(String[] _terms, int[] termIds)
void	readFields(DataInput in)
void	write(DataOutput out)

Methods inherited from class org.terrier.structures.indexing.FieldDocumentPostingList

clear, getDocumentStatistics, getFieldFrequencies, insert, insert, insert, insert

Methods inherited from class org.terrier.structures.indexing.DocumentPostingList

forEachTerm, getDocumentLength, getFrequency, getNumberOfPointers, getPostings2, getTermId, insert, insert, termSet

Methods inherited from class java.lang.Object

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

Field Detail

term_blocks

protected final gnu.trove.THashMap<String,gnu.trove.TIntHashSet> term_blocks

mapping term to blockids in this document

blockCount

protected int blockCount

number of blocks in this document. usually equal to document length, but perhaps less

Constructor Detail

BlockFieldDocumentPostingList

public BlockFieldDocumentPostingList(int NUM_FIELDS)

Constructs an instance of BlockFieldDocumentPostingList.

Parameters:

NUM_FIELDS -

Method Detail

getBlocks

public int[] getBlocks(String term)

Get the blocks for the specified term

insert

public void insert(String t,
          int fieldId,
          int blockId)

Insert a term into this document, occurs at given block id, and in the given field

insert

public void insert(String t,
          int[] fieldIds,
          int blockId)

Insert a term into this document, occurs at given block id, and in the given fields

insert

public void insert(int tf,
          String t,
          int[] fieldIds,
          int blockId)

Insert a term into this document tf times, occurs at given block id, and in the given fields

getPostings

public int[][] getPostings()

returns the postings suitable to be written into the block direct index

Overrides:

getPostings in class FieldDocumentPostingList

makePostingIterator

protected IterablePosting makePostingIterator(String[] _terms,
                                  int[] termIds)

Overrides:

makePostingIterator in class FieldDocumentPostingList

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Overrides:

readFields in class FieldDocumentPostingList

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Overrides:

write in class FieldDocumentPostingList

Throws:

IOException