Package org.aksw.limes.core.measures.mapper.temporal.simpleTemporal

Class PredecessorMapper

java.lang.Object

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

org.aksw.limes.core.measures.mapper.temporal.simpleTemporal.SimpleTemporalMapper

org.aksw.limes.core.measures.mapper.temporal.simpleTemporal.PredecessorMapper

All Implemented Interfaces:

IMapper, ISimpleTemporalMapper

public class PredecessorMapper
extends SimpleTemporalMapper

Implements the predecessor mapper class.

Version:

1.0

Author:

Kleanthi Georgala (georgala@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
PredecessorMapper()

Method Summary

Modifier and Type	Method	Description
AMapping	getMapping(ACache source, ACache target, String sourceVar, String targetVar, String expression, double threshold)	Maps a set of source instances to their predecessor target instances.
double	getMappingSizeApproximation(int sourceSize, int targetSize, double theta, IMapper.Language language)	Returns the estimated mapping size of the mapping computed by the mapper.
String	getName()	Returns the name of the mapper.
double	getRuntimeApproximation(int sourceSize, int targetSize, double theta, 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.temporal.simpleTemporal.SimpleTemporalMapper

getFirstProperty, getSecondProperty, orderByBeginDate

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

Methods inherited from interface org.aksw.limes.core.measures.mapper.IMapper

setNo

Constructor Detail

PredecessorMapper

public PredecessorMapper()

Method Detail

getMapping

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

Maps a set of source instances to their predecessor target instances. The mapping contains 1-to-m relations. Each source instance takes as predecessors the set of target instances with the highest begin date that is lower than the begin date of the source instance.

Parameters:

source - source cache

target - target cache

sourceVar - source property variable

targetVar - size property variable

expression - metric expression of link specification

threshold - threshold of link specification

Returns:

a mapping, the resulting mapping

getName

public String getName()

Returns the name of the mapper.

Returns:

Mapper name as a string

getRuntimeApproximation

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

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

Parameters:

sourceSize - source size

targetSize - target size

theta - atomic specification threshold

language - language of source and target variables

Returns:

estimated runtime, as double

getMappingSizeApproximation

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

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

Parameters:

sourceSize - source size

targetSize - target size

theta - atomic specification threshold

language - language of source and target variables

Returns:

estimated execution time, as double