org.universAAL.context.che.database.impl
Class SesameBackendCrdCnf

java.lang.Object
  org.universAAL.context.che.database.impl.SesameBackend
      org.universAAL.context.che.database.impl.SesameBackendCrd
          org.universAAL.context.che.database.impl.SesameBackendCrdCnf

All Implemented Interfaces:

Backend

public class SesameBackendCrdCnf
extends SesameBackendCrd

Extension of SesameBackendCrd that interprets the confidence value of received events before storing them. If the confidence is greater than the threshold passed to this class in the constructor or setThreshold, the event will be stored unchanged as in SesameBackend. Otherwise, only statements having the event as subject will be stored, but not reified statements about its subject nor object. Example: An "event1" with "subject2" "predicate3" and "object4" with enough confidence will result in having the statements in the store: "event1" "hasSubject" "subject2" "event1" "hasPredicate" "predicate3" "event1" "hasObject" "object4" "subject2" "predicate3" "object4" But if the confidence is below the threshold, the last reified statement is not stored.

Author:

alfiva

Field Summary

Fields inherited from class org.universAAL.context.che.database.impl.SesameBackend

uAALParser

Constructor Summary

SesameBackendCrdCnf()
Default constructor.

SesameBackendCrdCnf(int confidence)
Constructor with confidence.

Method Summary

int	getThreshold() Get confidence threshold.
void	setThreshold(int thr) Set confidence threshold.
void	storeEvent(ContextEvent e) Stores a ContextEvent in the underlying store.

Methods inherited from class org.universAAL.context.che.database.impl.SesameBackendCrd

connect

Methods inherited from class org.universAAL.context.che.database.impl.SesameBackend

close, populate, queryBySPARQL, removeOldEvents, retrieveEvent, retrieveEventsBetweenTstmp, retrieveEventsBySPARQL, retrieveEventsFromTstmp, retrieveEventsToTstmp, setuAALParser

Methods inherited from class java.lang.Object

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

Constructor Detail

SesameBackendCrdCnf

public SesameBackendCrdCnf()

Default constructor.

SesameBackendCrdCnf

public SesameBackendCrdCnf(int confidence)

Constructor with confidence.

Parameters:

confidence - 0 to 100.

Method Detail

storeEvent

public void storeEvent(ContextEvent e)

Description copied from interface: Backend

Stores a ContextEvent in the underlying store.

Specified by:

storeEvent in interface Backend

Overrides:

storeEvent in class SesameBackend

Parameters:

e - The context event to be stored.

getThreshold

public int getThreshold()

Get confidence threshold.

Returns:

Confidence.

setThreshold

public void setThreshold(int thr)

Set confidence threshold.

Parameters:

threshold - Confidence.