EDOBE XDOM PMML Instrukcja Użytkownika Pobierz pdf (Strona 22)

Constructors The constructor method is typically empty. When the constructor is

called, the node properties have not been initialized. Any subclass

initialization that depends on the node properties should be

implemented by overridding the

initializeNodeModel method,

which is called after the properties are set.

public ReadTextFileNodeModel() {

}

General Methods This class has a wide variety of methods that are used by the

application to find out about the node. For most of these, the default

implementation is used. Exceptions are discussed in the following

subsection.

When overriding methods, it’s often necessary to get information on

the current node properties. The method

getXTProps() returns this

information.

Check Properties The isPropertiesValid() method returns a boolean indicating

whether all of the required properties are specified. This method will

usually check the

XTProps object containing model information to

determine whether additional information is needed. This method is

almost always overridden.

Display Dialog The showPropertiesDialog() method displays the properties dialog

for the node. Typically this will construct a dialog passing the

XTProps object to the dialog’s constructor, and show the dialog. The

dialog gets current settings from the properties object and puts final

settings back into the properties object. This method is almost always

overridden.

Show Viewer The showView() method displays the viewer for the node. By default,

the Table View is presented. This method is only overridden if the

node has a custom viewer. Viewers should be non-blocking.

Special

Interfaces

Every node has the ability to display a property dialog, execute, and

display a viewer. In addition, some nodes support additional menu

item operations such as Create Predictor, Create Filter, and

Generate PMML. The

ActivityNodeModel indicates that it can

support this type of functionality by implementing the appropriate

interface.

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EDOBE XDOM PMML Instrukcja Użytkownika Strona 22