|Constructor and Description|
Also this constructor is available in
|Modifier and Type||Method and Description|
The standard table can always provide a table spec, that's why it is also executable: returns
This function is invoked by the
Load internals into the derived
Sets new settings from the passed object in the model.
Override this function in the derived model and reset your
Save internals of the derived
Adds to the given
Validates the settings in the passed
addWarningListener, computeFinalOutputSpecs, configure, continueLoop, createInitialStreamableOperatorInternals, createMergeOperator, createStreamableOperator, execute, finishStreamableExecution, getAvailableFlowVariables, getAvailableInputFlowVariables, getCredentialsProvider, getInHiLiteHandler, getInPortType, getInputPortRoles, getInteractiveNodeView, getLogger, getLoopEndNode, getLoopStartNode, getNrInPorts, getNrOutPorts, getOutHiLiteHandler, getOutPortType, getOutputPortRoles, getWarningMessage, iterate, notifyViews, notifyWarningListeners, onDispose, peekFlowVariableDouble, peekFlowVariableInt, peekFlowVariableString, pushFlowVariableDouble, pushFlowVariableInt, pushFlowVariableString, removeWarningListener, resetAndConfigureLoopBody, setInHiLiteHandler, setWarningMessage, stateChanged
rows- see DefaultTable constructor
columnNames- see DefaultTable constructor
columnTypes- see DefaultTable constructor
public DefaultTableNodeModel(DataRow rows, DataTableSpec spec)
rows- Passed to constructor of
spec- Passed to constructor of
DefaultTable.DefaultTable( DataRow, DataTableSpec)
protected BufferedDataTable execute(BufferedDataTable data, ExecutionContext exec) throws Exception
Node#executeNode()method of the node (through the
#executeModel(BufferedDataTable,ExecutionMonitor)method) only after all predecessor nodes have been successfully executed and all data is therefore available at the input ports. Implement this function with your task in the derived model.
The input data is available in the given array argument
inData and is ensured to be neither
null nor contain
null elements (with few non-standard exception, which are described in
more detail in
In order to create output data, you need to create objects of class
BufferedDataTable. Use the
execution context argument to create
data- An array holding
DataTableelements, one for each input.
exec- The execution monitor for this execute method. It provides us with means to create new
BufferedDataTable. Additionally, it should be asked frequently if the execution should be interrupted and throws an exception then. This exception might me caught, and then after closing all data streams, been thrown again. Also, if you can tell the progress of your task, just set it in this monitor.
nullDataTable elements with the size of the number of outputs. The result of this execution.
Exception- If you must fail the execution. Try to provide a meaningful error message in the exception as it will be displayed to the user.Please be advised to check frequently the canceled status by invoking
ExecutionMonitor#checkCanceledwhich will throw an
CanceledExcecutionExceptionand abort the execution.
protected void reset()
NodeModel. All components should unregister themselves from any observables (at least from the hilite handler right now). All internally stored data structures should be released. User settings should not be deleted/reset though.
protected DataTableSpec configure(DataTableSpec inSpecs)
true(so to say).
inSpecs- The input data table specs (as many as this model has inputs). Do NOT modify the contents of this array. If no spec is available for any given port (because the port is not connected or the previous node does not produce a spec) the framework will pass an empty
DataTableSpec(no columns) unless the port is marked as
optional(in which case the array element is null).
nullDataTableSpec elements are changed to empty once.
protected void loadValidatedSettingsFrom(NodeSettingsRO settings) throws InvalidSettingsException
#validateSettings(NodeSettings)method. The model must set its internal configuration according to the settings object passed.
protected void saveSettingsTo(NodeSettingsWO settings)
NodeSettingsthe model specific settings. The settings don't need to be complete or consistent. If, right after startup, no valid settings are available this method can write either nothing or invalid settings.
Method is called by the
Node if the current settings need
to be saved or transfered to the node's dialog.
settings- The object to write settings into.
protected void validateSettings(NodeSettingsRO settings) throws InvalidSettingsException
NodeSettingsobject. The specified settings should be checked for completeness and consistency. It must be possible to load a settings object validated here without any exception in the
#loadValidatedSettings(NodeSettings)method. The method must not change the current settings in the model - it is supposed to just check them. If some settings are missing, invalid, inconsistent, or just not right throw an exception with a message useful to the user.
settings- The settings to validate.
InvalidSettingsException- If the validation of the settings failed.
protected void loadInternals(File nodeInternDir, ExecutionMonitor exec) throws IOException, CanceledExecutionException
NodeModel. This method is only called if the
Nodewas executed. Read all your internal structures from the given file directory to create your internal data structure which is necessary to provide all node functionalities after the workflow is loaded, e.g. view content and/or hilite mapping.
nodeInternDir- The directory to read from.
exec- Used to report progress and to cancel the load process.
IOException- If an error occurs during reading from this dir.
CanceledExecutionException- If the loading has been canceled.
protected void saveInternals(File nodeInternDir, ExecutionMonitor exec) throws IOException, CanceledExecutionException
NodeModel. This method is only called if the
Nodeis executed. Write all your internal structures into the given file directory which are necessary to recreate this model when the workflow is loaded, e.g. view content and/or hilite mapping.
nodeInternDir- The directory to write into.
exec- Used to report progress and to cancel the save process.
IOException- If an error occurs during writing to this dir.
CanceledExecutionException- If the saving has been canceled.
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