org.terrier.structures.postings

Class FieldPostingImpl

java.lang.Object

org.terrier.structures.postings.BasicPostingImpl

org.terrier.structures.postings.FieldPostingImpl

All Implemented Interfaces:

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

public class FieldPostingImpl
extends BasicPostingImpl
implements FieldPosting

Implementation of a posting containing fields

See Also:

Serialized Form

Field Summary

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

dl, id, tf

Constructor Summary

Constructors

Constructor and Description
FieldPostingImpl() default constructor
FieldPostingImpl(int _fieldCount) constructor
FieldPostingImpl(int[] _fieldFrequencies) constructor
FieldPostingImpl(int id, int tf, int _fieldCount) constructor
FieldPostingImpl(int id, int tf, int[] _fieldFrequencies) constructor

Method Summary

Methods

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.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

FieldPostingImpl

public FieldPostingImpl()

default constructor

FieldPostingImpl

public FieldPostingImpl(int id,
                int tf,
                int _fieldCount)

constructor

Parameters:

id -

tf -

_fieldCount -

FieldPostingImpl

public FieldPostingImpl(int id,
                int tf,
                int[] _fieldFrequencies)

constructor

Parameters:

id -

tf -

_fieldFrequencies -

FieldPostingImpl

public FieldPostingImpl(int[] _fieldFrequencies)

constructor

Parameters:

_fieldFrequencies -

FieldPostingImpl

public FieldPostingImpl(int _fieldCount)

constructor

Parameters:

_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

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 BasicPostingImpl

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from class: BasicPostingImpl

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 BasicPostingImpl

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 BasicPostingImpl

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 BasicPostingImpl