Detailed Description

Provides a base class from which authors may create new FlowElements.

The process(FlowData) method deals with FlowData#isStopped() and any errors that may be thrown, and calls the abstract processInternal(FlowData) method to do the actual processing.

This class is primarily of use to creators of FlowElement subclasses, end users of Pipelines are unlikely to use this class in its raw form.

Parameters: <TData> - the type of element data that the flow element will write to FlowData; <TProperty> - the type of meta data that the flow element will supply about the properties it populates.

Inheritance diagram for fiftyone.pipeline.core.flowelements.FlowElementBase< TData extends ElementData, TProperty extends ElementPropertyMetaData >:

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Collaboration diagram for fiftyone.pipeline.core.flowelements.FlowElementBase< TData extends ElementData, TProperty extends ElementPropertyMetaData >:

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Classes

class	DataFactoryInternal Default implementation of the DataFactory interface. More...
class	DataFactorySimple DataFactory implementation which should be used temporarily with a single ElementData instance. More...

Public Member Functions

	FlowElementBase (Logger logger, ElementDataFactory< TData > elementDataFactory) Construct a new instance of the FlowElement. More...
void	addPipeline (Pipeline pipeline)
List< Pipeline >	getPipelines () Get a unmodifiable list of the Pipelines that this element has been added to. More...
abstract String	getElementDataKey ()
abstract EvidenceKeyFilter	getEvidenceKeyFilter ()
abstract List< TProperty >	getProperties ()
TProperty	getProperty (String name)
TypedKey< TData >	getTypedDataKey ()
void	process (FlowData data) throws Exception
DataFactory< TData >	getDataFactory ()
boolean	isConcurrent ()
boolean	isClosed ()
void	close () throws Exception
Public Member Functions inherited from fiftyone.pipeline.core.flowelements.FlowElement< TData, TProperty >
void	process (FlowData data) throws Exception Carry out whatever operations this element is designed to do using the FlowData passed. More...
void	addPipeline (Pipeline pipeline) Called when this element is added to a pipeline. More...
EvidenceKeyFilter	getEvidenceKeyFilter () Get a filter that will only include the evidence keys that this element can make use of. More...
String	getElementDataKey () Get the string name of the key used to access the data populated by this element in the FlowData. More...
TypedKey< TData >	getTypedDataKey () Get the typed data key used for retrieving strongly typed element data. More...
List< TProperty >	getProperties () Get details of the properties that this element can populate. More...
TProperty	getProperty (String name) Get a property from the properties that this element can populate using its name. More...
boolean	isConcurrent () if true, requires that the Pipeline guards against concurrent access to FlowData structures More...
boolean	isClosed () Indicates whether the element has been closed using the close() method, either explicitly or as a result of a 'try with resource'. More...
DataFactory< TData >	getDataFactory () Get the factory used to create the element data instances that are populated by this flow element. More...

Protected Member Functions

abstract void	processInternal (FlowData data) throws Exception Abstract method to be overridden by a FlowElement author. More...
abstract void	managedResourcesCleanup () Cleanup any managed resources that the element is using.
abstract void	unmanagedResourcesCleanup () Cleanup any unmanaged resources that the element is using.
void	close (boolean closing)
void	finalize () throws Throwable

Protected Attributes

final Logger	logger
TypedKey< TData >	typedKey = null

Constructor & Destructor Documentation

◆ FlowElementBase()

fiftyone.pipeline.core.flowelements.FlowElementBase< TData extends ElementData, TProperty extends ElementPropertyMetaData >.FlowElementBase	(	Logger	logger,
		ElementDataFactory< TData >	elementDataFactory
	)

Construct a new instance of the FlowElement.

Parameters: logger - logger instance to use for logging; elementDataFactory - the factory to use when creating a ElementDataBase instance

Member Function Documentation

◆ getPipelines()

List<Pipeline> fiftyone.pipeline.core.flowelements.FlowElementBase< TData extends ElementData, TProperty extends ElementPropertyMetaData >.getPipelines

(

)

Get a unmodifiable list of the Pipelines that this element has been added to.

Returns: list of Pipelines

◆ processInternal()

abstract void fiftyone.pipeline.core.flowelements.FlowElementBase< TData extends ElementData, TProperty extends ElementPropertyMetaData >.processInternal

(

FlowData

data

)

throws Exception

abstract protected

Abstract method to be overridden by a FlowElement author.

This is the where the main processing happens, and is called by the process(FlowData) method of the base class.

Parameters: data - containing evidence to process

Exceptions: Exception - to be caught by process(FlowData)

51Degrees Pipeline Java 4.1Newer Version 4.4

fiftyone.pipeline.core.flowelements.FlowElementBase< TData extends ElementData, TProperty extends ElementPropertyMetaData > Class Template Reference abstract