The appearance of a component may be changed with the indication of a Plugin class (a special possibility).
The self compiled JavaBean is selected at run-time, instead of the standard component for the visualization of the representation type.

Figure 55: XUI component - PlugIn
The validation and representation of the data is up to the respective plugin component. A Java interface (visualizer) allows the communication between the rendering engine and the PlugIn component.

The following figure shows the definition of the „FileDialog"PlugIn.
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Figure 56: Definition of a PlugIn
(1) Double-click one of the installed PlugIns. The selected class is taken over, and all the configuration options listed under the label „Constructors".
The PlugIn classes are instantiated with the Java Reflection API. A list of all constructors of this class appears, with a combination of parameter types to be processed by JAXFront. (see section 2.5.3.1). If no constructors are displayed, a Java Default Constructor exists for the selected class.
(2) Select the desired configuration (constructor) with a double-click. All the parameters to be declared are listed.
(3) Fill out the contents of the displayed parameter entries
A precise specification of the parameter types and their expected values is delivered by the JavaDoc of the respective PlugIn class.