org.terrier.structures.postings

Class BlockFieldPostingImpl

java.lang.Object

org.terrier.structures.postings.BasicPostingImpl

org.terrier.structures.postings.BlockPostingImpl

org.terrier.structures.postings.BlockFieldPostingImpl

All Implemented Interfaces:

Serializable, org.apache.hadoop.io.Writable, BlockPosting, FieldPosting, Posting, WritablePosting

public class BlockFieldPostingImpl
extends BlockPostingImpl
implements FieldPosting

A writable block field posting list

See Also:

Serialized Form

Field Summary

Fields inherited from class org.terrier.structures.postings.BasicPostingImpl

dl, id, tf

Constructor Summary

Constructors

Constructor and Description
BlockFieldPostingImpl() default constructor
BlockFieldPostingImpl(int docid, int frequency, int[] _positions, int fieldCount) constructor
BlockFieldPostingImpl(int docid, int frequency, int[] _positions, int[] _fieldFrequencies) contructure

Method Summary

Modifier and Type	Method and Description
WritablePosting	asWritablePosting() Copies this posting to one free of an iterator.
int[]	getFieldFrequencies() Returns the frequencies of the term in each field of the document
int[]	getFieldLengths() Returns the lengths of the each fields in the current document
void	readFields(DataInput in) Reads the a single posting (not an iterable posting - use BitPostingIndex for that)
void	setFieldLengths(int[] fl)
String	toString() Makes a human readable form of this posting
void	write(DataOutput out) Writes the current posting (not an iterable posting - use DirectInvertedOutputStream for that).

Methods inherited from class org.terrier.structures.postings.BlockPostingImpl

getPositions

Methods inherited from class org.terrier.structures.postings.BasicPostingImpl

getDocumentLength, getFrequency, getId, setDocumentLength, setId, setTf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.terrier.structures.postings.Posting

getDocumentLength, getFrequency, getId, setId

Constructor Detail

BlockFieldPostingImpl

public BlockFieldPostingImpl()

default constructor

BlockFieldPostingImpl

public BlockFieldPostingImpl(int docid,
                             int frequency,
                             int[] _positions,
                             int[] _fieldFrequencies)

contructure

Parameters:

docid -

frequency -

_positions -

_fieldFrequencies -

BlockFieldPostingImpl

public BlockFieldPostingImpl(int docid,
                             int frequency,
                             int[] _positions,
                             int fieldCount)

constructor

Parameters:

docid -

frequency -

_positions -

fieldCount -

Method Detail

getFieldFrequencies

public int[] getFieldFrequencies()

Returns the frequencies of the term in each field of the document

Specified by:

getFieldFrequencies in interface FieldPosting

getFieldLengths

public int[] getFieldLengths()

Returns the lengths of the each fields in the current document

Specified by:

getFieldLengths in interface FieldPosting

setFieldLengths

public void setFieldLengths(int[] fl)

Specified by:

setFieldLengths in interface FieldPosting

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from class: BlockPostingImpl

Reads the a single posting (not an iterable posting - use BitPostingIndex for that)

Specified by:

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

Overrides:

readFields in class BlockPostingImpl

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from class: BlockPostingImpl

Writes the current posting (not an iterable posting - use DirectInvertedOutputStream for that). Compression using this method is not expected to be comparable to bit-level compression.

Specified by:

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

Overrides:

write in class BlockPostingImpl

Throws:

IOException

asWritablePosting

public WritablePosting asWritablePosting()

Copies this posting to one free of an iterator. Kind of like a clone.

Specified by:

asWritablePosting in interface Posting

Overrides:

asWritablePosting in class BlockPostingImpl

Returns:

an identical posting, but which can be maniulated free of this iterator

toString

public String toString()

Makes a human readable form of this posting

Overrides:

toString in class BlockPostingImpl