org.android.activityminer.app.recognizer
Class RecognizerHelper<T extends Enum<T> & Dimensions>

java.lang.Object
  org.android.activityminer.app.recognizer.RecognizerHelper<T>

Type Parameters:

T - the enumeration type for the dimensions

All Implemented Interfaces:

EventObserver<FeatureVector>, ActivatableComponent

public class RecognizerHelper<T extends Enum<T> & Dimensions>
extends Object
implements EventObserver<FeatureVector>, ActivatableComponent

The recognition component.

Field Summary

private ActivatableComponent	activationDelegation activatable component implementation to delegate to
private android.support.v4.util.LongSparseArray<String>	cId2NameMapping The class identifier to name mapping
private Classifier	classifier The classifier.
private Context	context The context.
private GenericObservableCutoutCreator<T,Double>	cutoutCreator The cut-out creator.
private AbstractFeatureExtractor<T>	featureExtractor The feature extractor component.
private PredictionResult	lastPrediction The last prediction
private ObservableSensorScanner<T,Double>	sensorScanner The observable sensor scanner.
private PowerManager.WakeLock	wakeLock The wake lock.

Constructor Summary

private

RecognizerHelper(Context context, Classifier classifier, AbstractFeatureExtractor<T> featureExtractor, ObservableSensorScanner<T,Double> sensorScanner, RuntimeConfiguration config, android.support.v4.util.LongSparseArray<String> cId2NameMapping) Constructor

Method Summary

private void	acquireWakeLock() Does acquire the wake lock
static RecognizerHelper<?>	createHelper(Context context, String modelName) Builder method for the helper instance
void	doTerminate() Method to stop activity recognition.
boolean	isActive() Test method for the actiation state.
protected void	onActivationStateChange(boolean active)
void	onEvent(ObservableEventSource<? extends FeatureVector> eventSource, FeatureVector featureVector)
private void	releaseWakeLock() Does release the wake lock
void	setActivationState(boolean active) Method to set the activation state of the component
protected void	storePredictionInfo(double certainty, String predictedClass, Long timeStamp) Does store the prediction to database

Methods inherited from class java.lang.Object

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

Field Detail

context

private final Context context

The context.

activationDelegation

private final ActivatableComponent activationDelegation

activatable component implementation to delegate to

wakeLock

private final PowerManager.WakeLock wakeLock

The wake lock.

featureExtractor

private final AbstractFeatureExtractor<T extends Enum<T> & Dimensions> featureExtractor

The feature extractor component.

cutoutCreator

private final GenericObservableCutoutCreator<T extends Enum<T> & Dimensions,Double> cutoutCreator

The cut-out creator.

sensorScanner

private final ObservableSensorScanner<T extends Enum<T> & Dimensions,Double> sensorScanner

The observable sensor scanner.

classifier

private final Classifier classifier

The classifier.

cId2NameMapping

private final android.support.v4.util.LongSparseArray<String> cId2NameMapping

The class identifier to name mapping

lastPrediction

private PredictionResult lastPrediction

The last prediction

Constructor Detail

RecognizerHelper

private RecognizerHelper(Context context,
                         Classifier classifier,
                         AbstractFeatureExtractor<T> featureExtractor,
                         ObservableSensorScanner<T,Double> sensorScanner,
                         RuntimeConfiguration config,
                         android.support.v4.util.LongSparseArray<String> cId2NameMapping)

Constructor

Parameters:

context - the context

classifier - the classifier

featureExtractor - the feature extractor

sensorScanner - the sensor scanner

config - the runtime configuration

cId2NameMapping - the class identifier to name mapping

Method Detail

onActivationStateChange

protected final void onActivationStateChange(boolean active)

Parameters:

active -

releaseWakeLock

private final void releaseWakeLock()

Does release the wake lock

acquireWakeLock

private final void acquireWakeLock()

Does acquire the wake lock

doTerminate

public final void doTerminate()

Method to stop activity recognition.

onEvent

public void onEvent(ObservableEventSource<? extends FeatureVector> eventSource,
                    FeatureVector featureVector)

Specified by:

onEvent in interface EventObserver<FeatureVector>

storePredictionInfo

protected void storePredictionInfo(double certainty,
                                   String predictedClass,
                                   Long timeStamp)

Does store the prediction to database

Parameters:

certainty - the certainty

predictedClass - the predicted class

timeStamp - the time stamp

createHelper

public static final RecognizerHelper<?> createHelper(Context context,
                                                     String modelName)

Builder method for the helper instance

Parameters:

context - the application context

modelName - the model name

Returns:

the created helper instance or null in case of an invalid model

setActivationState

public void setActivationState(boolean active)

Description copied from interface: ActivatableComponent

Method to set the activation state of the component

Specified by:

setActivationState in interface ActivatableComponent

Parameters:

active - the activation sate flag

isActive

public boolean isActive()

Description copied from interface: ActivatableComponent

Test method for the actiation state.

Specified by:

isActive in interface ActivatableComponent

Returns:

true if active, false otherwise