org.knime.base.node.io.listfiles
Class ListFilesNodeDialog

java.lang.Object
  org.knime.core.node.NodeDialogPane
      org.knime.base.node.io.listfiles.ListFilesNodeDialog

All Implemented Interfaces:

ItemListener, EventListener

public class ListFilesNodeDialog
extends NodeDialogPane
implements ItemListener

NodeDialog for the "List Files" Node. This node dialog derives from DefaultNodeSettingsPane which allows creation of a simple dialog with standard components. If you need a more complex dialog please derive directly from NodeDialogPane.

Author:

Peter

Constructor Summary

protected

ListFilesNodeDialog() Creates a new List FilesNodeDialog.

Method Summary

void	itemStateChanged(ItemEvent e)
protected void	loadSettingsFrom(NodeSettingsRO settings, DataTableSpec[] specs) Invoked before the dialog window is opened.
protected String[]	popupFileChooser() Pops up the file selection dialog and returns the path(s) to the selected file(s) - or null if the user canceled.
protected void	saveSettingsTo(NodeSettingsWO settings) Invoked when the settings need to be applied.

Methods inherited from class org.knime.core.node.NodeDialogPane

addFlowVariablesTab, addJobMgrTab, addTab, addTabAt, closeOnESC, createFlowVariableModel, createFlowVariableModel, createFlowVariableModel, finishEditingAndSaveSettingsTo, getAvailableFlowVariables, getCredentialsNames, getCredentialsProvider, getPanel, getTab, getTabIndex, internalLoadSettingsFrom, isWriteProtected, loadSettingsFrom, loadSettingsFrom, onCancel, onClose, onOpen, removeTab, renameTab, saveSettingsTo, setEnabled, setSelected

Methods inherited from class java.lang.Object

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

Constructor Detail

ListFilesNodeDialog

protected ListFilesNodeDialog()

Creates a new List FilesNodeDialog.

Method Detail

itemStateChanged

public void itemStateChanged(ItemEvent e)

Specified by:

itemStateChanged in interface ItemListener

popupFileChooser

protected String[] popupFileChooser()

Pops up the file selection dialog and returns the path(s) to the selected file(s) - or null if the user canceled.

Returns:

Array containing the File locations

saveSettingsTo

protected void saveSettingsTo(NodeSettingsWO settings)
                       throws InvalidSettingsException

Invoked when the settings need to be applied. The implementation should write the current user settings from its components into the passed object. It should not check consistency or completeness of the settings - this is part of the model's load method. The only situation this method would throw an exception is when a component contains an invalid value that can't be stored in the settings object.
The settings must be written in a way the model is able to load in, i.e. with the model's keys.

Specified by:

saveSettingsTo in class NodeDialogPane

Parameters:

settings - The settings object to write into.

Throws:

InvalidSettingsException - If the settings are not applicable to the model.

See Also:

NodeModel.loadSettingsFrom(NodeSettingsRO)

loadSettingsFrom

protected void loadSettingsFrom(NodeSettingsRO settings,
                                DataTableSpec[] specs)
                         throws NotConfigurableException

Invoked before the dialog window is opened. The settings object passed, contains the current settings of the corresponding node model. The model and the dialog must agree on a mutual contract on how settings are stored in the spec. I.e. they must able to read each other's settings.

The implementation must be able to handle invalid or incomplete settings as the model may not have any reasonable values yet (for example when the dialog is opened for the first time). When an empty/invalid settings object is passed the dialog should set default values in its components.

Overrides:

loadSettingsFrom in class NodeDialogPane

Parameters:

settings - The settings to load into the dialog. Could be an empty object or contain invalid settings. But will never be null.

specs - The input data table specs. 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).

Throws:

NotConfigurableException - if the dialog cannot be opened because of real invalid settings or if any preconditions are not fulfilled, e.g. no predecessor node, no nominal column in input table, etc.

See Also:

NodeModel.loadSettingsFrom(NodeSettingsRO)