Package org.aksw.limes.core.measures.mapper.pointsets

Class OrchidMapper

java.lang.Object

org.aksw.limes.core.measures.mapper.AMapper

org.aksw.limes.core.measures.mapper.pointsets.OrchidMapper

All Implemented Interfaces:

IMapper

public class OrchidMapper
extends AMapper

Author:

Axel-C. Ngonga Ngomo (ngonga@informatik.uni-leipzig.de)

Nested Class Summary

Nested classes/interfaces inherited from interface org.aksw.limes.core.measures.mapper.IMapper

IMapper.Language

Constructor Summary

Constructors

Constructor	Description
OrchidMapper()

Method Summary

Modifier and Type	Method	Description
AMapping	getMapping(ACache source, ACache target, String sourceVar, String targetVar, String expression, double threshold)	Computes a mapping using the setMeasure distance
double	getMappingSizeApproximation(int sourceSize, int targetSize, double threshold, IMapper.Language language)	Returns the estimated mapping size of the mapping computed by the mapper.
String	getName()	Returns the name of the mapper.
static List<Point>	getPoints(String wktString)
static Polygon	getPolygon(String wktString)	Computes a polygon out of a WKT string
Set<Polygon>	getPolygons(ACache c, String property)	Computes polygons out of strings in the WKT format.
double	getRuntimeApproximation(int sourceSize, int targetSize, double threshold, IMapper.Language language)	Returns the estimated time needed to obtain the mapping computed by the mapper.

Methods inherited from class org.aksw.limes.core.measures.mapper.AMapper

getUriToUriMapping, getUriToUriMapping, getValueToUriMap, setNo

Methods inherited from class java.lang.Object

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

Constructor Detail

OrchidMapper

public OrchidMapper()

Method Detail

getPoints

public static List<Point> getPoints(String wktString)

getPolygon

public static Polygon getPolygon(String wktString)

Computes a polygon out of a WKT string

Parameters:

wktString - An WKT string

Returns:

A polygon

getMapping

public AMapping getMapping(ACache source,
                           ACache target,
                           String sourceVar,
                           String targetVar,
                           String expression,
                           double threshold)

Computes a mapping using the setMeasure distance

Parameters:

source - Source cache

target - Target cache

sourceVar - Variable for the source dataset

targetVar - Variable for the target dataset

expression - Expression to process. Leads to termination if the expression is not atomic

threshold - Similarity threshold. Is transformed internally into a distance threshold theta with threshold = 1/(1+theta)

Returns:

A mapping which contains uris whose polygons are such that their distance is below the set threshold

getPolygons

public Set<Polygon> getPolygons(ACache c,
                                String property)

Computes polygons out of strings in the WKT format. Currently works for LINESTRING, POINT, POLYGON

Parameters:

c - Cache from which the data is to be fetched

property - Property to use

Returns:

Set of polygons. Each polygon contains the uri to which it matches

getName

public String getName()

Description copied from interface: IMapper

Returns the name of the mapper.

Returns:

Mapper name as a string

getRuntimeApproximation

public double getRuntimeApproximation(int sourceSize,
                                      int targetSize,
                                      double threshold,
                                      IMapper.Language language)

Description copied from interface: IMapper

Returns the estimated time needed to obtain the mapping computed by the mapper.

Parameters:

sourceSize - source size

targetSize - target size

threshold - atomic specification threshold

language - language of source and target variables

Returns:

estimated runtime, as double

getMappingSizeApproximation

public double getMappingSizeApproximation(int sourceSize,
                                          int targetSize,
                                          double threshold,
                                          IMapper.Language language)

Description copied from interface: IMapper

Returns the estimated mapping size of the mapping computed by the mapper.

Parameters:

sourceSize - source size

targetSize - target size

threshold - atomic specification threshold

language - language of source and target variables

Returns:

estimated execution time, as double