org.gcube.indexmanagement.featureindexlibrary.vafile

Class VAFile

java.lang.Object

org.gcube.indexmanagement.featureindexlibrary.vafile.VAFile

All Implemented Interfaces:

FeatureIndex

public class VAFile
extends Object
implements FeatureIndex

The VAFile index

Author:

UoA

Constructor Summary

Constructors

Constructor and Description
VAFile(VAFileParams params) Creates a new instance

Method Summary

Methods

Modifier and Type	Method and Description
void	addFeatureVector(FeatureVectorElement elem) Adds a new element
void	addFeatureVector(FeatureVectorElement[] elem) Adds new elements
void	commit() Commits additions
String	getIndexID() Returns the index id of the index instance
long	getNumberOfElements() Retrieves the number of elements in the index
ArrayList<RankedResultElement>	lookup(float[] vector, int k) Performs a lookup with default parameter values
ArrayList<RankedResultElement>	lookup(float[] vector, int k, LookupParams lp) Performs a lookup with default parameter values
void	removeEntry(String id) Removes the record from the index

Methods inherited from class java.lang.Object

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

Constructor Detail

VAFile

public VAFile(VAFileParams params)
       throws Exception

Creates a new instance

Parameters:

params - The index creation parameters

Throws:

Exception - An error

Method Detail

addFeatureVector

public void addFeatureVector(FeatureVectorElement elem)
                      throws Exception

Description copied from interface: FeatureIndex

Adds a new element

Specified by:

addFeatureVector in interface FeatureIndex

Parameters:

elem - The element to add

Throws:

Exception - an error

See Also:

FeatureIndex.addFeatureVector(org.gcube.indexmanagement.featureindexlibrary.commons.FeatureVectorElement)

addFeatureVector

public void addFeatureVector(FeatureVectorElement[] elem)
                      throws Exception

Description copied from interface: FeatureIndex

Adds new elements

Specified by:

addFeatureVector in interface FeatureIndex

Parameters:

elem - the elements to add

Throws:

Exception - an error

See Also:

FeatureIndex.addFeatureVector(org.gcube.indexmanagement.featureindexlibrary.commons.FeatureVectorElement[])

commit

public void commit()
            throws Exception

Description copied from interface: FeatureIndex

Commits additions

Specified by:

commit in interface FeatureIndex

Throws:

Exception - an error

See Also:

FeatureIndex.commit()

getNumberOfElements

public long getNumberOfElements()
                         throws Exception

Description copied from interface: FeatureIndex

Retrieves the number of elements in the index

Specified by:

getNumberOfElements in interface FeatureIndex

Returns:

the number of elements

Throws:

Exception - an error

See Also:

FeatureIndex.getNumberOfElements()

lookup

public ArrayList<RankedResultElement> lookup(float[] vector,
                                    int k)
                                      throws Exception

Description copied from interface: FeatureIndex

Performs a lookup with default parameter values

Specified by:

lookup in interface FeatureIndex

Parameters:

vector - the vectror to search for

k - the number of results

Returns:

the results

Throws:

Exception - an error

See Also:

FeatureIndex.lookup(float[], int)

lookup

public ArrayList<RankedResultElement> lookup(float[] vector,
                                    int k,
                                    LookupParams lp)
                                      throws Exception

Description copied from interface: FeatureIndex

Performs a lookup with default parameter values

Specified by:

lookup in interface FeatureIndex

Parameters:

vector - the vectror to search for

k - the number of results

lp - lookup parameters

Returns:

the results

Throws:

Exception - an error

See Also:

FeatureIndex.lookup(float[], int, org.gcube.indexmanagement.featureindexlibrary.commons.LookupParams)

removeEntry

public void removeEntry(String id)
                 throws Exception

Description copied from interface: FeatureIndex

Removes the record from the index

Specified by:

removeEntry in interface FeatureIndex

Parameters:

id - the id to remove

Throws:

Exception - an error

See Also:

FeatureIndex.removeEntry(java.lang.String)

getIndexID

public String getIndexID()
                  throws Exception

Returns the index id of the index instance

Specified by:

getIndexID in interface FeatureIndex

Returns:

The index ID

Throws:

Exception - An unrecoverable for the operation error occured

See Also:

FeatureIndex.getIndexID()