Package adams.flow.transformer

Class CallableTransformer

java.lang.Object

adams.core.logging.LoggingObject

adams.core.logging.CustomLoggingLevelObject

adams.core.option.AbstractOptionHandler

adams.flow.core.AbstractActor

adams.flow.core.AbstractCallableActor

adams.flow.transformer.CallableTransformer

All Implemented Interfaces:

AdditionalInformationHandler, CleanUpHandler, Destroyable, GlobalInfoSupporter, LoggingLevelHandler, LoggingSupporter, OptionHandler, QuickInfoSupporter, ShallowCopySupporter<Actor>, SizeOfHandler, Stoppable, StoppableWithFeedback, VariablesInspectionHandler, VariableChangeListener, Actor, CallableActorUser, ErrorHandler, InputConsumer, OutputProducer, Serializable, Comparable

public class CallableTransformer
extends AbstractCallableActor
implements InputConsumer, OutputProducer

Feeds tokens into a callable transformer and broadcasts the generated output tokens.

-logging-level <OFF|SEVERE|WARNING|INFO|CONFIG|FINE|FINER|FINEST> (property: loggingLevel)
    The logging level for outputting errors and debugging output.
    default: WARNING
 

-name <java.lang.String> (property: name)
    The name of the actor.
    default: CallableTransformer
 

-annotation <adams.core.base.BaseAnnotation> (property: annotations)
    The annotations to attach to this actor.
    default: 
 

-skip <boolean> (property: skip)
    If set to true, transformation is skipped and the input token is just forwarded 
    as it is.
    default: false
 

-stop-flow-on-error <boolean> (property: stopFlowOnError)
    If set to true, the flow gets stopped in case this actor encounters an error;
     useful for critical actors.
    default: false
 

-callable <adams.flow.core.CallableActorReference> (property: callableName)
    The name of the callable actor to use.
    default: unknown
 

-optional <boolean> (property: optional)
    If enabled, then the callable actor is optional, ie no error is raised if 
    not found, merely ignored.
    default: false
 

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static String	BACKUP_INPUT	the key for storing the current input token in the backup.
protected Token	m_InputToken	the token that is to be fed into the callable transformer.

Fields inherited from class adams.flow.core.AbstractCallableActor

BACKUP_CALLABLEACTOR, BACKUP_CONFIGURED, m_CallableActor, m_CallableName, m_Configured, m_FindCallableActorError, m_Helper, m_Optional

Fields inherited from class adams.flow.core.AbstractActor

m_Annotations, m_BackupState, m_DetectedObjectVariables, m_DetectedVariables, m_ErrorHandler, m_Executed, m_Executing, m_ExecutionListeningSupporter, m_FullName, m_LoggingPrefix, m_Name, m_Parent, m_ScopeHandler, m_Self, m_Silent, m_Skip, m_StopFlowOnError, m_StopMessage, m_Stopped, m_StorageHandler, m_VariablesUpdated

Fields inherited from class adams.core.option.AbstractOptionHandler

m_OptionManager

Fields inherited from class adams.core.logging.LoggingObject

m_Logger, m_LoggingIsEnabled, m_LoggingLevel

Fields inherited from interface adams.flow.core.Actor

FILE_EXTENSION, FILE_EXTENSION_GZ

Constructor Summary

Constructors

Constructor	Description
CallableTransformer()	Default constructor.
CallableTransformer(CallableActorReference name)	Allows setting the callable name.

Method Summary

Modifier and Type	Method	Description
Class[]	accepts()	Returns the class that the consumer accepts.
protected Hashtable<String,Object>	backupState()	Backs up the current state of the actor before update the variables.
Token	currentInput()	Returns the current input token, if any.
protected String	executeCallableActor()	Executes the callable actor.
protected Actor	findCallableActor()	Tries to find the callable actor referenced by its name.
Class[]	generates()	Returns the class of objects that it generates.
String	globalInfo()	Returns a string describing the object.
boolean	hasInput()	Returns whether an input token is currently present.
boolean	hasPendingOutput()	Checks whether there is pending output to be collected after executing the flow item.
void	input(Token token)	The method that accepts the input token and then processes it.
Token	output()	Returns the generated token.
protected void	reset()	Resets the scheme.
protected void	restoreState(Hashtable<String,Object> state)	Restores the state of the actor before the variables got updated.

Methods inherited from class adams.flow.core.AbstractCallableActor

callableNameTipText, cleanUp, defineOptions, doExecute, getCallableActor, getCallableName, getOptional, getQuickInfo, hasCallableActor, initialize, isFinished, optionalTipText, pruneBackup, setCallableName, setOptional, setUp, setUpCallableActor, stopExecution

Methods inherited from class adams.flow.core.AbstractActor

annotationsTipText, canInspectOptions, canPerformSetUpCheck, compareTo, configureLogger, destroy, equals, execute, finalUpdateVariables, findVariables, findVariables, forceVariables, forCommandLine, forName, forName, getAdditionalInformation, getAnnotations, getDefaultName, getDetectedVariables, getErrorHandler, getFlowActors, getFlowExecutionListeningSupporter, getFullName, getName, getNextSibling, getParent, getParentComponent, getPreviousSibling, getRoot, getScopeHandler, getSilent, getSkip, getStopFlowOnError, getStopMessage, getStorageHandler, getVariables, handleError, handleException, hasErrorHandler, hasStopMessage, index, isBackedUp, isExecuted, isExecuting, isHeadless, isStopped, nameTipText, performSetUpChecks, performVariableChecks, postExecute, preExecute, pruneBackup, setAnnotations, setErrorHandler, setName, setParent, setSilent, setSkip, setStopFlowOnError, setVariables, shallowCopy, shallowCopy, silentTipText, sizeOf, skipTipText, stopExecution, stopFlowOnErrorTipText, updateDetectedVariables, updatePrefix, updateVariables, variableChanged, wrapUp

Methods inherited from class adams.core.option.AbstractOptionHandler

cleanUpOptions, finishInit, getDefaultLoggingLevel, getOptionManager, loggingLevelTipText, newOptionManager, setLoggingLevel, toCommandLine, toString

Methods inherited from class adams.core.logging.LoggingObject

getLogger, getLoggingLevel, initializeLogging, isLoggingEnabled

Methods inherited from class java.lang.Object

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

Methods inherited from interface adams.flow.core.Actor

cleanUp, compareTo, destroy, equals, execute, findVariables, getAnnotations, getDefaultName, getDetectedVariables, getErrorHandler, getFlowExecutionListeningSupporter, getFullName, getName, getNextSibling, getParent, getParentComponent, getPreviousSibling, getQuickInfo, getRoot, getScopeHandler, getSilent, getSkip, getStopFlowOnError, getStopMessage, getStorageHandler, getVariables, handleError, hasErrorHandler, hasStopMessage, index, isExecuted, isFinished, isHeadless, isStopped, setAnnotations, setErrorHandler, setName, setParent, setSilent, setSkip, setStopFlowOnError, setUp, setVariables, shallowCopy, shallowCopy, sizeOf, stopExecution, stopExecution, toCommandLine, variableChanged, wrapUp

Methods inherited from interface adams.core.AdditionalInformationHandler

getAdditionalInformation

Methods inherited from interface adams.core.logging.LoggingLevelHandler

getLoggingLevel, setLoggingLevel

Methods inherited from interface adams.core.logging.LoggingSupporter

getLogger, isLoggingEnabled

Methods inherited from interface adams.core.option.OptionHandler

cleanUpOptions, defineOptions, getOptionManager

Methods inherited from interface adams.core.VariablesInspectionHandler

canInspectOptions

Field Detail

BACKUP_INPUT

public static final String BACKUP_INPUT

the key for storing the current input token in the backup.

See Also:

Constant Field Values

m_InputToken

protected transient Token m_InputToken

the token that is to be fed into the callable transformer.

Constructor Detail

CallableTransformer

public CallableTransformer()

Default constructor.

CallableTransformer

public CallableTransformer(CallableActorReference name)

Allows setting the callable name.

Parameters:

name - the reference to use

Method Detail

globalInfo

public String globalInfo()

Returns a string describing the object.

Specified by:

globalInfo in interface GlobalInfoSupporter

Specified by:

globalInfo in class AbstractOptionHandler

Returns:

a description suitable for displaying in the gui

findCallableActor

protected Actor findCallableActor()

Tries to find the callable actor referenced by its name. Makes sure that the actor produces output.

Overrides:

findCallableActor in class AbstractCallableActor

Returns:

the callable actor or null if not found

backupState

protected Hashtable<String,Object> backupState()

Backs up the current state of the actor before update the variables.

Overrides:

backupState in class AbstractCallableActor

Returns:

the backup

See Also:

AbstractActor.updateVariables(), AbstractActor.restoreState(Hashtable)

restoreState

protected void restoreState(Hashtable<String,Object> state)

Restores the state of the actor before the variables got updated.

Overrides:

restoreState in class AbstractCallableActor

Parameters:

state - the backup of the state to restore from

See Also:

AbstractActor.updateVariables(), AbstractActor.backupState()

reset

protected void reset()

Resets the scheme.

Overrides:

reset in class AbstractCallableActor

accepts

public Class[] accepts()

Returns the class that the consumer accepts.

Specified by:

accepts in interface InputConsumer

Returns:

the Class of objects that can be processed

input

public void input(Token token)

The method that accepts the input token and then processes it.

Specified by:

input in interface InputConsumer

Parameters:

token - the token to accept and process

hasInput

public boolean hasInput()

Returns whether an input token is currently present.

Specified by:

hasInput in interface InputConsumer

Returns:

true if input token present

currentInput

public Token currentInput()

Returns the current input token, if any.

Specified by:

currentInput in interface InputConsumer

Returns:

the input token, null if none present

generates

public Class[] generates()

Returns the class of objects that it generates.

Specified by:

generates in interface OutputProducer

Returns:

depends on the callable actor

executeCallableActor

protected String executeCallableActor()

Executes the callable actor. Derived classes might need to override this method to ensure atomicity.

Specified by:

executeCallableActor in class AbstractCallableActor

Returns:

null if no error, otherwise error message

output

public Token output()

Returns the generated token.

Specified by:

output in interface OutputProducer

Returns:

the generated token

hasPendingOutput

public boolean hasPendingOutput()

Checks whether there is pending output to be collected after executing the flow item.

Specified by:

hasPendingOutput in interface OutputProducer

Returns:

true if there is pending output