Package adams.flow.control

Class Once

java.lang.Object

adams.core.logging.LoggingObject

adams.core.logging.CustomLoggingLevelObject

adams.core.option.AbstractOptionHandler

adams.flow.core.AbstractActor

adams.flow.control.AbstractControlActor

adams.flow.control.AbstractTee

adams.flow.control.Tee

adams.flow.control.Once

All Implemented Interfaces:

AdditionalInformationHandler, CleanUpHandler, Destroyable, GlobalInfoSupporter, LoggingLevelHandler, LoggingSupporter, OptionHandler, Pausable, QuickInfoSupporter, ShallowCopySupporter<Actor>, SizeOfHandler, Stoppable, StoppableWithFeedback, VariablesInspectionHandler, FlowPauseStateListener, VariableChangeListener, AtomicExecution, Actor, ActorHandler, ActorWithConditionalEquivalent, ActorWithTimedEquivalent, ControlActor, ErrorHandler, Flushable, InputConsumer, MutableActorHandler, OutputProducer, SubFlowWrapUp, VariableMonitor, Serializable, Comparable

public class Once
extends Tee
implements VariableMonitor

Tees off a token only once to its sub-actors.
However, this can be reset when the monitored variable changes.

Input/output:
- accepts:
adams.flow.core.Unknown
- generates:
adams.flow.core.Unknown


Conditional equivalent:
adams.flow.control.ConditionalTee

-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: Once
 

-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
 

-silent <boolean> (property: silent)
    If enabled, then no errors are output in the console.
    default: false
 

-finish-before-stopping <boolean> (property: finishBeforeStopping)
    If enabled, actor first finishes processing all data before stopping.
    default: false
 

-asynchronous <boolean> (property: asynchronous)
    If enabled, the sub-actors get executed asynchronously rather than the flow 
    waiting for them to finish before proceeding with execution.
    default: false
 

-tee <adams.flow.core.AbstractActor> [-tee ...] (property: actors)
    The actors to siphon-off the tokens to.
    default: 
 

-var-name <adams.core.VariableName> (property: variableName)
    The variable to monitor.
    default: variable
 

Version:

$Revision$

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class adams.flow.control.AbstractTee

AbstractTee.TeeSwingWorker

Field Summary

Fields

Modifier and Type	Field	Description
static String	BACKUP_EXECUTEDONCE	the key for storing whether the actor already got executed.
protected boolean	m_ExecutedOnce	whether the actor was executed once.
protected VariableName	m_VariableName	the variable to listen to.

Fields inherited from class adams.flow.control.AbstractTee

BACKUP_INPUT, m_Actors, m_Asynchronous, m_AsynchronousWorker, m_InputToken, m_MinimumActiveActors, m_OutputToken

Fields inherited from class adams.flow.control.AbstractControlActor

m_Compatibility, m_PauseStateManager, m_SetUpSubActors

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
Once()

Method Summary

Modifier and Type	Method	Description
protected Hashtable<String,Object>	backupState()	Backs up the current state of the actor before update the variables.
protected boolean	canProcessInput(Token token)	Returns whether the token can be processed in the tee actor.
void	defineOptions()	Adds options to the internal list of options.
String	getQuickInfo()	Returns a quick info about the actor, which will be displayed in the GUI.
VariableName	getVariableName()	Returns the name of the variable to monitor.
String	globalInfo()	Returns a string describing the object.
protected String	processInput(Token token)	Processes the token.
protected void	pruneBackup()	Removes entries from the backup.
protected void	reset()	Resets the scheme.
protected void	restoreState(Hashtable<String,Object> state)	Restores the state of the actor before the variables got updated.
void	setVariableName(VariableName value)	Sets the name of the variable to monitor.
void	variableChanged(VariableChangeEvent e)	Gets triggered when a variable changed (added, modified, removed).
String	variableNameTipText()	Returns the tip text for this property.

Methods inherited from class adams.flow.control.Tee

checkTeeActor, checkTeeActors, getActorHandlerInfo, getConditionalEquivalent, getTimedEquivalent, setUpTeeActors

Methods inherited from class adams.flow.control.AbstractTee

accepts, actorsTipText, add, add, asynchronousTipText, check, cleanUp, createTeeToken, currentInput, doExecute, execute, finishBeforeStoppingTipText, finishedAsynchronousExecution, flushExecution, forceVariables, generates, get, getActors, getAsynchronous, getFinishBeforeStopping, getInternalActors, getMinimumActiveActors, getStoppingTimeout, hasInput, hasPendingOutput, indexOf, initialize, input, output, remove, removeAll, set, setActors, setAsynchronous, setFinishBeforeStopping, setLoggingLevel, setMinimumActiveActors, setSkip, setStoppingTimeout, setUpSubActors, size, stopExecution, stoppingTimeoutTipText, updateParent, waitForAsynchronousExecution, wrapUp

Methods inherited from class adams.flow.control.AbstractControlActor

active, canInspectOptions, destroy, firstActive, firstInputConsumer, flowPauseStateChanged, isPaused, isSubFlowWrappedUp, lastActive, pauseExecution, preExecute, resumeExecution, setParent, setUp, wrapUpSubFlow

Methods inherited from class adams.flow.core.AbstractActor

annotationsTipText, canPerformSetUpCheck, compareTo, configureLogger, equals, finalUpdateVariables, findVariables, findVariables, 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, isFinished, isHeadless, isStopped, nameTipText, performSetUpChecks, performVariableChecks, postExecute, pruneBackup, setAnnotations, setErrorHandler, setName, setSilent, setStopFlowOnError, setVariables, shallowCopy, shallowCopy, silentTipText, sizeOf, skipTipText, stopExecution, stopFlowOnErrorTipText, updateDetectedVariables, updatePrefix, updateVariables

Methods inherited from class adams.core.option.AbstractOptionHandler

cleanUpOptions, finishInit, getDefaultLoggingLevel, getOptionManager, loggingLevelTipText, newOptionManager, 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, 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, wrapUp

Methods inherited from interface adams.flow.core.ActorHandler

firstActive, lastActive

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, getOptionManager

Methods inherited from interface adams.core.VariablesInspectionHandler

canInspectOptions

Field Detail

BACKUP_EXECUTEDONCE

public static final String BACKUP_EXECUTEDONCE

the key for storing whether the actor already got executed.

See Also:

Constant Field Values

m_VariableName

protected VariableName m_VariableName

the variable to listen to.

m_ExecutedOnce

protected boolean m_ExecutedOnce

whether the actor was executed once.

Constructor Detail

Once

public Once()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing the object.

Specified by:

globalInfo in interface GlobalInfoSupporter

Overrides:

globalInfo in class Tee

Returns:

a description suitable for displaying in the gui

defineOptions

public void defineOptions()

Adds options to the internal list of options.

Specified by:

defineOptions in interface OptionHandler

Overrides:

defineOptions in class AbstractTee

reset

protected void reset()

Resets the scheme.

Overrides:

reset in class AbstractControlActor

getQuickInfo

public String getQuickInfo()

Returns a quick info about the actor, which will be displayed in the GUI.

Specified by:

getQuickInfo in interface Actor

Specified by:

getQuickInfo in interface QuickInfoSupporter

Overrides:

getQuickInfo in class AbstractTee

Returns:

null if no info available, otherwise short string

setVariableName

public void setVariableName(VariableName value)

Sets the name of the variable to monitor.

Specified by:

setVariableName in interface VariableMonitor

Parameters:

value - the name

getVariableName

public VariableName getVariableName()

Returns the name of the variable to monitor.

Specified by:

getVariableName in interface VariableMonitor

Returns:

the name

variableNameTipText

public String variableNameTipText()

Returns the tip text for this property.

Specified by:

variableNameTipText in interface VariableMonitor

Returns:

tip text for this property suitable for displaying in the GUI or for listing the options.

pruneBackup

protected void pruneBackup()

Removes entries from the backup.

Overrides:

pruneBackup in class AbstractActor

See Also:

AbstractActor.reset()

backupState

protected Hashtable<String,Object> backupState()

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

Overrides:

backupState in class AbstractTee

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 AbstractTee

Parameters:

state - the backup of the state to restore from

See Also:

AbstractActor.updateVariables(), AbstractActor.backupState()

variableChanged

public void variableChanged(VariableChangeEvent e)

Gets triggered when a variable changed (added, modified, removed).

Specified by:

variableChanged in interface Actor

Specified by:

variableChanged in interface VariableChangeListener

Overrides:

variableChanged in class AbstractActor

Parameters:

e - the event

canProcessInput

protected boolean canProcessInput(Token token)

Returns whether the token can be processed in the tee actor.

Overrides:

canProcessInput in class AbstractTee

Parameters:

token - the token to process

Returns:

true if token can be processed

processInput

protected String processInput(Token token)

Processes the token.

Overrides:

processInput in class AbstractTee

Parameters:

token - the token to process

Returns:

an optional error message, null if everything OK