org.terrier.structures

Class BasicTermStatsLexiconEntry

java.lang.Object

org.terrier.structures.LexiconEntry

org.terrier.structures.BasicTermStatsLexiconEntry

All Implemented Interfaces:

Serializable, org.apache.hadoop.io.Writable, EntryStatistics, Pointer

public class BasicTermStatsLexiconEntry
extends LexiconEntry

A LexiconEntry which only contains EntryStatistics

Author:

Craig Macdonald

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	n_t
protected int	termId
protected int	TF

Constructor Summary

Constructors

Constructor and Description
BasicTermStatsLexiconEntry() Constructs an instance of the BasicTermStatsLexiconEntry.
BasicTermStatsLexiconEntry(int _TF, int _n_t, int _termId) Constructs an instance of the BasicTermStatsLexiconEntry.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(EntryStatistics le) Increment the statistics of this object by that of another
int	getDocumentFrequency() The number of documents that the entry (term) occurred in
int	getFrequency() The frequency (total number of occurrences) of the entry (term).
int	getNumberOfEntries() Returns number of "things" that this pointer refers to
long	getOffset() Get the offset (bytes)
byte	getOffsetBits() Get the number of bits for the offset
int	getTermId() The id of the term
String	pointerToString() Returns a textual representation of the pointer alone
void	readFields(DataInput in)
void	setAll(int _TF, int _n_t, int _termId) Sets the term frequency, document frequency and term id for this term
void	setBitIndexPointer(BitIndexPointer pointer) Sets the bit index pointer to this LexiconEntry
void	setDocumentFrequency(int _n_t) Sets the document frequency
void	setFrequency(int _TF) Sets the frequency for this term
void	setNumberOfEntries(int n) Set the number of "things that the pointer refers to
void	setOffset(BitFilePosition pos) Sets the offset using a BitFilePosition
void	setOffset(long bytes, byte bits) Set the offset in terms of bits and bytes
void	setPointer(Pointer p) Sets the pointer within this object to that represented by the specified pointer
void	setStatistics(int _n_t, int _TF) Set the document frequency and term frequency
void	setTermId(int _termId) Set the term ID
void	subtract(EntryStatistics le) Decrement the statistics of this object by that of another
void	write(DataOutput out)

Methods inherited from class org.terrier.structures.LexiconEntry

equals, getWritableEntryStatistics, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

n_t

protected int n_t

TF

protected int TF

termId

protected int termId

Constructor Detail

BasicTermStatsLexiconEntry

public BasicTermStatsLexiconEntry()

Constructs an instance of the BasicTermStatsLexiconEntry.

BasicTermStatsLexiconEntry

public BasicTermStatsLexiconEntry(int _TF,
                          int _n_t,
                          int _termId)

Constructs an instance of the BasicTermStatsLexiconEntry.

Parameters:

_TF -

_n_t -

_termId -

Method Detail

getDocumentFrequency

public int getDocumentFrequency()

The number of documents that the entry (term) occurred in

setDocumentFrequency

public void setDocumentFrequency(int _n_t)

Sets the document frequency

getFrequency

public int getFrequency()

The frequency (total number of occurrences) of the entry (term).

setFrequency

public void setFrequency(int _TF)

Sets the frequency for this term

getTermId

public int getTermId()

The id of the term

setTermId

public void setTermId(int _termId)

Set the term ID

Specified by:

setTermId in class LexiconEntry

setAll

public void setAll(int _TF,
          int _n_t,
          int _termId)

Sets the term frequency, document frequency and term id for this term

getNumberOfEntries

public int getNumberOfEntries()

Returns number of "things" that this pointer refers to

Specified by:

getNumberOfEntries in interface Pointer

Overrides:

getNumberOfEntries in class LexiconEntry

getOffsetBits

public byte getOffsetBits()

Get the number of bits for the offset

getOffset

public long getOffset()

Get the offset (bytes)

setOffset

public void setOffset(long bytes,
             byte bits)

Set the offset in terms of bits and bytes

setBitIndexPointer

public void setBitIndexPointer(BitIndexPointer pointer)

Sets the bit index pointer to this LexiconEntry

setOffset

public void setOffset(BitFilePosition pos)

Sets the offset using a BitFilePosition

readFields

public void readFields(DataInput in)
                throws IOException

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Throws:

IOException

add

public void add(EntryStatistics le)

Increment the statistics of this object by that of another

subtract

public void subtract(EntryStatistics le)

Decrement the statistics of this object by that of another

setNumberOfEntries

public void setNumberOfEntries(int n)

Set the number of "things that the pointer refers to

Specified by:

setNumberOfEntries in interface Pointer

Overrides:

setNumberOfEntries in class LexiconEntry

pointerToString

public String pointerToString()

Returns a textual representation of the pointer alone

Specified by:

pointerToString in interface Pointer

Overrides:

pointerToString in class LexiconEntry

setPointer

public void setPointer(Pointer p)

Sets the pointer within this object to that represented by the specified pointer

Specified by:

setPointer in interface Pointer

Overrides:

setPointer in class LexiconEntry

Parameters:

p - other pointer to update the pointer in this object

setStatistics

public void setStatistics(int _n_t,
                 int _TF)

Description copied from class: LexiconEntry

Set the document frequency and term frequency

Specified by:

setStatistics in class LexiconEntry