QueryProcessor.SF.ImgIdx
Class WindsurfQuerySFMtree

java.lang.Object
  QueryProcessor.Query
      QueryProcessor.SF.QuerySF
          QueryProcessor.SF.ImgIdx.QuerySFIndex
              QueryProcessor.SF.ImgIdx.WindsurfQuerySFMtree

public class WindsurfQuerySFMtree
extends QuerySFIndex

Class representing a query for Windsurf with a scoring function to be solved with a M-tree.

Field Summary

protected java.lang.String

filename The absolute path of the file containing the index

Fields inherited from class QueryProcessor.SF.QuerySF

sf

Fields inherited from class QueryProcessor.Query

q

Constructor Summary

WindsurfQuerySFMtree(Image query, ScoringFunction sf, java.lang.String filename)
Basic constructor.

Method Summary

boolean	closeCursor() Deletes the previously created cursor for sorted access.
boolean	createCursor() Creates a cursor for performing sorted access on the index.
int	getDistances() Returns the number of distance computations performed by the region index.
ScoredResultImage	getNext() Performs a sorted access on the existing cursor.
java.util.Vector<ScoredResultImage>	kNN(int k) Performs a k-nn query.
java.util.Vector<ScoredResultImage>	range(double r) Performs a range query.
boolean	resetDistances() Resets the number of distance computations performed by the region index.

Methods inherited from class java.lang.Object

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

Field Detail

filename

protected java.lang.String filename

The absolute path of the file containing the index

Constructor Detail

WindsurfQuerySFMtree

public WindsurfQuerySFMtree(Image query,
                            ScoringFunction sf,
                            java.lang.String filename)

Basic constructor.

Parameters:

query - Query image.

sf - Scoring function to be used.

filename - The absolute path of the file containing the index.

Method Detail

kNN

public java.util.Vector<ScoredResultImage> kNN(int k)

Performs a k-nn query.

Overrides:

kNN in class QuerySFIndex

Parameters:

k - Number of requested results.

Returns:

Vector of query results.

range

public java.util.Vector<ScoredResultImage> range(double r)

Performs a range query.

Overrides:

range in class QuerySFIndex

Parameters:

r - Radius of the query.

Returns:

Vector of query results.

createCursor

public boolean createCursor()

Creates a cursor for performing sorted access on the index.

Specified by:

createCursor in class QuerySFIndex

Returns:

true if the cursor was successfully created, false otherwise.

closeCursor

public boolean closeCursor()

Deletes the previously created cursor for sorted access.

Specified by:

closeCursor in class QuerySFIndex

Returns:

true if the cursor was successfully deleted, false otherwise.

getNext

public ScoredResultImage getNext()

Performs a sorted access on the existing cursor.

Specified by:

getNext in class QuerySFIndex

Returns:

The next image of the cursor.

resetDistances

public boolean resetDistances()

Resets the number of distance computations performed by the region index.

Specified by:

resetDistances in class QuerySFIndex

Returns:

true if the count was successfully reset, false otherwise.

getDistances

public int getDistances()

Returns the number of distance computations performed by the region index.

Specified by:

getDistances in class QuerySFIndex

Returns:

Number of distance computations performed by the region index.