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 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

Fields

Modifier and Type	Field and Description
static String	MODIFIED_FIELD

Constructor Summary

Constructors

Constructor and Description
BoostByModificationDateStrategy()

Method Summary

Modifier and Type	Method and Description
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, Map<String,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.

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 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 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:

IOException

boost

public float boost(org.apache.lucene.index.IndexReader reader,
                   Map<String,Object> params,
                   int doc,
                   float score)
            throws 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:

IOException

boost

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

IOException