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

Class SimpleTemporalMapper

java.lang.Object

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

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

All Implemented Interfaces:

IMapper, ISimpleTemporalMapper

Direct Known Subclasses:

ConcurrentMapper, PredecessorMapper, SuccessorMapper

public abstract class SimpleTemporalMapper
extends AMapper
implements ISimpleTemporalMapper

Abstract class of simple temporal relations mapper.

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
SimpleTemporalMapper()

Method Summary

Modifier and Type	Method	Description
protected String	getFirstProperty(String expression)	Extracts first property (beginDate) from metric expression.
protected String	getSecondProperty(String expression)	Extracts second property (machineID) from metric expression.
protected TreeMap<String,Set<Instance>>	orderByBeginDate(ACache cache, String expression, String kbType)	Orders a cache of instances based on their begin date property.

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

getMapping, getMappingSizeApproximation, getName, getRuntimeApproximation, setNo

Constructor Detail

SimpleTemporalMapper

public SimpleTemporalMapper()

Method Detail

getFirstProperty

protected String getFirstProperty(String expression)

Extracts first property (beginDate) from metric expression.

Parameters:

expression - , The metric expression

Returns:

first property of metric expression as string

getSecondProperty

protected String getSecondProperty(String expression)

Extracts second property (machineID) from metric expression.

Parameters:

expression - , The metric expression

Returns:

second property of metric expression as string

orderByBeginDate

protected TreeMap<String,Set<Instance>> orderByBeginDate(ACache cache,
                                                               String expression,
                                                               String kbType)

Orders a cache of instances based on their begin date property. For each instance, it retrieves its begin date property, converts its value to an epoch (string) using the SimpleDateFormat function and places the instance inside the corresponding set("bucket") of instances.

Parameters:

cache - , the cache of instances

expression - , the metric expression

kbType - , source or target

Returns:

blocks, a map of sets with unique begin dates as keys and set of instances as values