/**
* The value of <code>get(uidClassID)</code> must be the <code>String</code> name of a class that
* implements the corresponding <code>ComponentUI</code> class. If the class hasn't been loaded
* before, this method looks up the class with <code>uiClassLoader.loadClass()</code> if a non
* <code>null</code> class loader is provided, <code>classForName()</code> otherwise.
*
* <p>If a mapping for <code>uiClassID</code> exists or if the specified class can't be found,
* return <code>null</code>.
*
* <p>This method is used by <code>getUI</code>, it's usually not necessary to call it directly.
*
* @param uiClassID a string containing the class ID
* @param uiClassLoader the object which will load the class
* @return the value of <code>Class.forName(get(uidClassID))</code>
* @see #getUI
*/
public Class<? extends ComponentUI> getUIClass(String uiClassID, ClassLoader uiClassLoader) {
try {
String className = (String) get(uiClassID);
if (className != null) {
ReflectUtil.checkPackageAccess(className);
Class cls = (Class) get(className);
if (cls == null) {
if (uiClassLoader == null) {
cls = SwingUtilities.loadSystemClass(className);
} else {
cls = uiClassLoader.loadClass(className);
}
if (cls != null) {
// Save lookup for future use, as forName is slow.
put(className, cls);
}
}
return cls;
}
} catch (ClassNotFoundException e) {
return null;
} catch (ClassCastException e) {
return null;
}
return null;
}
