Package org.terrier.matching.matchops

Class SingleTermOp

java.lang.Object

org.terrier.matching.matchops.Operator

org.terrier.matching.matchops.SingleTermOp

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class SingleTermOp
extends Operator

This class implements a single indexing token as a matching op.

Since:

5.0

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static org.slf4j.Logger	logger

Fields inherited from class org.terrier.matching.matchops.Operator

IGNORE_LOW_IDF_TERMS

Constructor Summary

Constructors

Constructor	Description
SingleTermOp(java.lang.String t)
SingleTermOp(java.lang.String t, java.lang.String f)

Method Summary

Modifier and Type	Method	Description
SingleTermOp	clone()
java.lang.String	getField()
MatchingEntry	getMatcher(MatchingQueryTerms.QueryTermProperties qtp, Index index, Lexicon<java.lang.String> lexicon, PostingIndex<Pointer> invertedIndex, CollectionStatistics collectionStatistics)	get an entry for matching for this query op.
org.apache.commons.lang3.tuple.Pair<EntryStatistics,IterablePosting>	getPostingIterator(Index index)	get posting iterator for this query op.
java.lang.String	getTerm()
SingleTermOp	setField(java.lang.String newField)
void	setTerm(java.lang.String newTerm)
java.lang.String	toString()

Methods inherited from class org.terrier.matching.matchops.Operator

equals, hashCode, parse

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

Constructor Detail

SingleTermOp

public SingleTermOp(java.lang.String t)

SingleTermOp

public SingleTermOp(java.lang.String t,
                    java.lang.String f)

Method Detail

getTerm

public java.lang.String getTerm()

setTerm

public void setTerm(java.lang.String newTerm)

setField

public SingleTermOp setField(java.lang.String newField)

toString

public java.lang.String toString()

Specified by:

toString in class Operator

clone

public SingleTermOp clone()

Overrides:

clone in class Operator

getPostingIterator

public org.apache.commons.lang3.tuple.Pair<EntryStatistics,IterablePosting> getPostingIterator(Index index)
                                                                                              throws java.io.IOException

Description copied from class: Operator

get posting iterator for this query op.

Specified by:

getPostingIterator in class Operator

Returns:

Pair, but Pair.of(null,null) if term not found

Throws:

java.io.IOException

getMatcher

public MatchingEntry getMatcher(MatchingQueryTerms.QueryTermProperties qtp,
                                Index index,
                                Lexicon<java.lang.String> lexicon,
                                PostingIndex<Pointer> invertedIndex,
                                CollectionStatistics collectionStatistics)
                         throws java.io.IOException

Description copied from class: Operator

get an entry for matching for this query op. calls getPostingIterator() internally

Specified by:

getMatcher in class Operator

Throws:

java.io.IOException

getField

public java.lang.String getField()