org.android.activityminer.app.db
Class FeatureExtractionTask<T extends Enum<T> & Dimensions>

java.lang.Object
  android.os.AsyncTask<Void,Integer,Long>
      org.android.activityminer.app.db.FeatureExtractionTask<T>

Type Parameters:

T - the enumeration type for the dimensions

All Implemented Interfaces:

EventObserver<FeatureExtractionHelper.ProgressEvent>, ObservableEventSource<TaskFinishedEvent>, ObserverRegistration<TaskFinishedEvent>

public class FeatureExtractionTask<T extends Enum<T> & Dimensions>
extends AsyncTask<Void,Integer,Long>
implements ObservableEventSource<TaskFinishedEvent>, EventObserver<FeatureExtractionHelper.ProgressEvent>

The asynchronous feature extraction task.

Nested Class Summary

Nested classes/interfaces inherited from class android.os.AsyncTask

AsyncTask.Status

Field Summary

private double	avgTimeForFeatureExtraction The average extraction time per cut-out.
private Context	context The activity context.
private int	extractedSampleCount The count of extracted samples.
private List<Long>	failedIds The recoding identifiers which failed to process.
private FeatureExtractionHelper<T>	helper Helper to delegate feature extraction to
private ObservableEventSource<TaskFinishedEvent>	observableEventSource The observable event source for delegation.
private double	processingTime The total processing time in seconds.
private Integer[]	progress The progress counter.
private ProgressDialog	progressDialog The progress dialog.
private DBRecordingStatisticSequenceEntry	sequenceStatistics The sequence statistic to process.

Fields inherited from class android.os.AsyncTask

SERIAL_EXECUTOR, THREAD_POOL_EXECUTOR

Constructor Summary

private

FeatureExtractionTask(Context context, DBRecordingStatisticSequenceEntry sequenceStatistics, FeatureExtractionHelper<T> featureExtractionHelper) Constructor

Method Summary

static void	createAndRunTask(Context context, DBManager dbManager, Configuration config, DBRecordingStatisticSequenceEntry sequenceStatistic, EventObserver<? extends TaskFinishedEvent> finishedObserver) Does create and execute a feature extraction Task for the given configuration and recording identifiers.
protected Long	doInBackground(Void... params)
void	execute() An execution wrapper.
boolean	hasObservers()
void	notify(TaskFinishedEvent data)
private void	notifyForErrors() Does notify the user about the errors.
private void	notifyForResult() Does notify the average extraction time needed per cut-out.
void	onEvent(ObservableEventSource<? extends FeatureExtractionHelper.ProgressEvent> eventSource, FeatureExtractionHelper.ProgressEvent observedEvent)
protected void	onPostExecute(Long result)
protected void	onPreExecute()
protected void	onProgressUpdate(Integer... values)
void	registerEventObserver(EventObserver<? extends TaskFinishedEvent> observer)
void	removeAllObservers()
void	unregisterEventObserver(EventObserver<? extends TaskFinishedEvent> observer)

Methods inherited from class android.os.AsyncTask

cancel, execute, execute, executeOnExecutor, get, get, getStatus, isCancelled, onCancelled, onCancelled, publishProgress

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 activity context.

helper

private final FeatureExtractionHelper<T extends Enum<T> & Dimensions> helper

Helper to delegate feature extraction to

progressDialog

private ProgressDialog progressDialog

The progress dialog.

sequenceStatistics

private final DBRecordingStatisticSequenceEntry sequenceStatistics

The sequence statistic to process.

failedIds

private final List<Long> failedIds

The recoding identifiers which failed to process.

progress

private final Integer[] progress

The progress counter.

observableEventSource

private final ObservableEventSource<TaskFinishedEvent> observableEventSource

The observable event source for delegation.

avgTimeForFeatureExtraction

private double avgTimeForFeatureExtraction

The average extraction time per cut-out.

extractedSampleCount

private int extractedSampleCount

The count of extracted samples.

processingTime

private double processingTime

The total processing time in seconds.

Constructor Detail

FeatureExtractionTask

private FeatureExtractionTask(Context context,
                              DBRecordingStatisticSequenceEntry sequenceStatistics,
                              FeatureExtractionHelper<T> featureExtractionHelper)

Constructor

Parameters:

context - the application context

sequenceStatistics - the sequence statistics to process

featureExtractionHelper - the feature extraction helper

Method Detail

onPreExecute

protected void onPreExecute()

Overrides:

onPreExecute in class AsyncTask<Void,Integer,Long>

onPostExecute

protected void onPostExecute(Long result)

Overrides:

onPostExecute in class AsyncTask<Void,Integer,Long>

notifyForResult

private void notifyForResult()

Does notify the average extraction time needed per cut-out.

notifyForErrors

private void notifyForErrors()

Does notify the user about the errors.

onProgressUpdate

protected void onProgressUpdate(Integer... values)

Overrides:

onProgressUpdate in class AsyncTask<Void,Integer,Long>

doInBackground

protected Long doInBackground(Void... params)

Specified by:

doInBackground in class AsyncTask<Void,Integer,Long>

execute

public void execute()

An execution wrapper.

createAndRunTask

public static final void createAndRunTask(Context context,
                                          DBManager dbManager,
                                          Configuration config,
                                          DBRecordingStatisticSequenceEntry sequenceStatistic,
                                          EventObserver<? extends TaskFinishedEvent> finishedObserver)

Does create and execute a feature extraction Task for the given configuration and recording identifiers.

Parameters:

context - the context of the caller

dbManager - the database manager to use

config - the configuration to use

sequenceStatistic - the sequence statistics to process

finishedObserver - the finished event observer

registerEventObserver

public void registerEventObserver(EventObserver<? extends TaskFinishedEvent> observer)

Specified by:

registerEventObserver in interface ObserverRegistration<TaskFinishedEvent>

unregisterEventObserver

public void unregisterEventObserver(EventObserver<? extends TaskFinishedEvent> observer)

Specified by:

unregisterEventObserver in interface ObserverRegistration<TaskFinishedEvent>

removeAllObservers

public void removeAllObservers()

Specified by:

removeAllObservers in interface ObserverRegistration<TaskFinishedEvent>

notify

public void notify(TaskFinishedEvent data)

Specified by:

notify in interface ObservableEventSource<TaskFinishedEvent>

hasObservers

public boolean hasObservers()

Specified by:

hasObservers in interface ObservableEventSource<TaskFinishedEvent>

onEvent

public void onEvent(ObservableEventSource<? extends FeatureExtractionHelper.ProgressEvent> eventSource,
                    FeatureExtractionHelper.ProgressEvent observedEvent)

Specified by:

onEvent in interface EventObserver<FeatureExtractionHelper.ProgressEvent>