FeatureProvider Class Reference

#include <Feature.h>

Inheritance diagram for FeatureProvider:

List of all members.

Public Member Functions
virtual	~FeatureProvider ()
virtual Feature *	getFeature (string name) const =0
virtual Feature *	getSample (string name) const =0
virtual void	nextSample (clock_t checkpoint)=0
string	getName () const
stringvector *	getFeatureList () const
Protected Member Functions
	FeatureProvider (string name, stringvector *features)

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Detailed Description

FeatureProvider interface

Each feature that is used in the cluster space definition is provided by a feature provider. A feature provider can provide more than one feature and will be refered to by a unique name. A feature can then be unambiguously identified by a combination of its own name and the name of its feature provider. Thus the actual cluster space can be defined in a configuration file and the clustering infrastructure can fetch the according features based on that definition.

See also:

Feature

PersistantFeature

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Constructor & Destructor Documentation

FeatureProvider::FeatureProvider (  string  name, stringvector *  features )  [inline, protected]

Constructor Initializes the names of the provider and its features. Parameters: name  Name of the provider. features  List of featurenames provided.

virtual FeatureProvider::~FeatureProvider (   )  [inline, virtual]

Destructor Empty virtual destructor to have an entry in the implementing classes method table. This ensures that derived classes get destructed correctly.

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Member Function Documentation

virtual Feature* FeatureProvider::getFeature (  string  name  )  const [pure virtual]

Query feature instance Query the feature provider for a specific feature initialized with random values. Parameters: name  Name of the requested feature. Returns: An instance of the requested feature. Implemented in ActiveWindowFeatureProvider, AudioFeatureProvider, BluetoothFeatureProvider, GSMFeatureProvider, PHPWrapperFeatureProvider, PowerFeatureProvider, SystemCommandStringListFeatureProvider, TimeFeatureProvider, VideoFeatureProvider, and WlanFeatureProvider.

stringvector* FeatureProvider::getFeatureList (   )  const [inline]

Query list of provided features Returns: A list of feature names provided by that feature provider.

string FeatureProvider::getName (   )  const [inline]

Query provider name Returns: A global unique name for the feature provider.

virtual Feature* FeatureProvider::getSample (  string  name  )  const [pure virtual]

Query sample instance Query the feature provider for a sample value of the specified feature. Prior to this method you have to invoke nextSample(). Parameters: name  Name of the requested feature. Returns: An instance of the sample. See also: nextSample Implemented in ActiveWindowFeatureProvider, AudioFeatureProvider, BluetoothFeatureProvider, BluetoothLinuxFeatureProvider, GSMFeatureProvider, PHPWrapperFeatureProvider, PowerFeatureProvider, SystemCommandStringListFeatureProvider, TimeFeatureProvider, VideoFeatureProvider, WlanFeatureProvider, and WlanLinuxFeatureProvider.

virtual void FeatureProvider::nextSample (  clock_t  checkpoint  )  [pure virtual]

Prepare sample Prepare the feature provider to return the next sample from the sensor when getSample() is called. Parameters: checkpoint  This parameter tells the feature extractor that it must not return sensordata sampled earlier than the given clock value. See also: getSample Implemented in ActiveWindowFeatureProvider, AudioFeatureProvider, BluetoothFeatureProvider, GSMFeatureProvider, PHPWrapperFeatureProvider, PowerFeatureProvider, SystemCommandStringListFeatureProvider, TimeFeatureProvider, VideoFeatureProvider, WlanFeatureProvider, and WlanLinuxFeatureProvider.

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The documentation for this class was generated from the following file:

• amw/src/cpp/cross/contextprediction/framework/Features/Feature.h

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