com.atlassian.confluence.search.v2.lucene.boosting
Class BoostByModificationDateStrategy

java.lang.Object
  com.atlassian.confluence.search.v2.lucene.boosting.BoostByModificationDateStrategy

All Implemented Interfaces:

BoostingStrategy

public class BoostByModificationDateStrategy
extends java.lang.Object
implements BoostingStrategy

A BoostingStrategy that boost the scores based on the modification date of scored document. Recently modified Document get a higher boost.

Field Summary

static java.lang.String

MODIFIED_FIELD

Constructor Summary

BoostByModificationDateStrategy()

Method Summary

float	boost(org.apache.lucene.index.IndexReader reader, int asboluteDocId, float score) Apply a relevant boost to the specified document with the specified score.
float	boost(org.apache.lucene.index.IndexReader reader, java.util.Map<java.lang.String,java.lang.Object> params, int doc, float score) Apply a relevant boost to the specified document with the specified score.
float	boost(org.apache.lucene.index.IndexReader reader, SearchQueryParameters searchQueryParameters, int doc, float score) Apply a relevant boost to the specified document with the specified score.
com.atlassian.confluence.search.v2.lucene.boosting.BoostByModificationDateStrategy.DateMilestone	getDateMilestones()
void	setDateMilestones(com.atlassian.confluence.search.v2.lucene.boosting.BoostByModificationDateStrategy.DateMilestone dateMilestones)

Methods inherited from class java.lang.Object

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

Field Detail

MODIFIED_FIELD

public static final java.lang.String MODIFIED_FIELD

See Also:

Constant Field Values

Constructor Detail

BoostByModificationDateStrategy

public BoostByModificationDateStrategy()

Method Detail

boost

public float boost(org.apache.lucene.index.IndexReader reader,
                   int asboluteDocId,
                   float score)
            throws java.io.IOException

Description copied from interface: BoostingStrategy

Apply a relevant boost to the specified document with the specified score. Returning a score of 0 will remove the document from the results.

Warning: This method needs to return extremely fast, so any I/O like using the index reader to load the actual document is discouraged. If you need access to a documents field values you should rather consider using a FieldCache instead.

Specified by:

boost in interface BoostingStrategy

Parameters:

reader - a reader instance associated with the current scoring process

asboluteDocId - the doc id

score - the original score for the document specified by doc

Returns:

the boosted score, 0 to remove the document from the results, or score to make no change to the score

Throws:

java.io.IOException

boost

public float boost(org.apache.lucene.index.IndexReader reader,
                   java.util.Map<java.lang.String,java.lang.Object> params,
                   int doc,
                   float score)
            throws java.io.IOException

Description copied from interface: BoostingStrategy

Apply a relevant boost to the specified document with the specified score. Returning a score of 0 will remove the document from the results.

Warning: This method needs to return extremely fast, so any I/O like using the index reader to load the actual document is discouraged. If you need access to a documents field values you should rather consider using a FieldCache instead.

Specified by:

boost in interface BoostingStrategy

Parameters:

reader - a reader instance associated with the current scoring process

params - extra state information used by more complex boosting strategies

doc - the doc id

score - the original score for the document specified by doc

Returns:

the boosted score, 0 to remove the document from the results, or score to make no change to the score

Throws:

java.io.IOException

boost

public float boost(org.apache.lucene.index.IndexReader reader,
                   SearchQueryParameters searchQueryParameters,
                   int doc,
                   float score)
            throws java.io.IOException

Description copied from interface: BoostingStrategy

Apply a relevant boost to the specified document with the specified score. Returning a score of 0 will remove the document from the results.

Warning: This method needs to return extremely fast, so any I/O like using the index reader to load the actual document is discouraged. If you need access to a documents field values you should rather consider using a FieldCache instead.

If you are implementing this method but do not use the searchQueryParameters, it is safe to delegate directly to the boost(IndexReader, int, float) method.

Specified by:

boost in interface BoostingStrategy

Parameters:

reader - a reader instance associated with the current scoring process

searchQueryParameters - extra state information used by more complex boosting strategies

doc - the doc id

score - the original score for the document specified by doc, or score to make no change to the score

Returns:

the boosted score or 0 to remove the document from the results

Throws:

java.io.IOException

getDateMilestones

public com.atlassian.confluence.search.v2.lucene.boosting.BoostByModificationDateStrategy.DateMilestone getDateMilestones()

setDateMilestones

public void setDateMilestones(com.atlassian.confluence.search.v2.lucene.boosting.BoostByModificationDateStrategy.DateMilestone dateMilestones)