public abstract class ServiceUIFactory extends Object
Services may optionally provide UIs which allow different styles of interaction in different roles. One role may be end-user browsing and setting of print options. Another role may be administering the print service.
Although the Print Service API does not presently provide standardised support for administering a print service, monitoring of the print service is possible and a UI may provide for private update mechanisms.
The basic design intent is to allow applications to lazily locate and initialize services only when needed without any API dependencies except in an environment in which they are used.
Swing UIs are preferred as they provide a more consistent L&F and can support accessibility APIs.
Example usage:
ServiceUIFactory factory = printService.getServiceUIFactory();
if (factory != null) {
JComponent swingui = (JComponent)factory.getUI(
ServiceUIFactory.MAIN_UIROLE,
ServiceUIFactory.JCOMPONENT_UI);
if (swingui != null) {
tabbedpane.add("Custom UI", swingui);
}
}
public static final String JCOMPONENT_UI
Denotes a UI implemented as a Swing component. The value of the String is the fully qualified classname : "javax.swing.JComponent".
public static final String PANEL_UI
Denotes a UI implemented as an AWT panel. The value of the String is the fully qualified classname : "java.awt.Panel"
public static final String DIALOG_UI
Denotes a UI implemented as an AWT dialog. The value of the String is the fully qualified classname : "java.awt.Dialog"
public static final String JDIALOG_UI
Denotes a UI implemented as a Swing dialog. The value of the String is the fully qualified classname : "javax.swing.JDialog"
public static final int ABOUT_UIROLE
Denotes a UI which performs an informative "About" role.
public static final int ADMIN_UIROLE
Denotes a UI which performs an administrative role.
public static final int MAIN_UIROLE
Denotes a UI which performs the normal end user role.
public static final int RESERVED_UIROLE
Not a valid role but role id's greater than this may be used for private roles supported by a service. Knowledge of the function performed by this role is required to make proper use of it.
public ServiceUIFactory()
public abstract Object getUI(int role,
String ui) Get a UI object which may be cast to the requested UI type by the application and used in its user interface.
role - requested. Must be one of the standard roles or a private role supported by this factory.ui - type in which the role is requested.IllegalArgumentException - if the role or ui is neither one of the standard ones, nor a private one supported by the factory.public abstract String[] getUIClassNamesForRole(int role)
Given a UI role obtained from this factory obtain the UI types available from this factory which implement this role. The returned Strings should refer to the static variables defined in this class so that applications can use equality of reference ("==").
role - to be looked up.IllegalArgumentException - is the role is a non-standard role not supported by this factory.
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