/**
* Load the defined uninstall listener objects.
*
* @return a list with the defined uninstall listeners
* @throws Exception
*/
private List[] getListenerLists() throws Exception {
ArrayList[] uninstaller = new ArrayList[] {new ArrayList(), new ArrayList()};
// Load listeners if exist
InputStream in;
ObjectInputStream objIn;
in = Destroyer.class.getResourceAsStream("/uninstallerListeners");
if (in != null) {
objIn = new ObjectInputStream(in);
List listeners = (List) objIn.readObject();
objIn.close();
Iterator iter = listeners.iterator();
while (iter != null && iter.hasNext()) {
Class clazz = Class.forName(((String) iter.next()));
UninstallerListener ul = (UninstallerListener) clazz.newInstance();
if (ul.isFileListener()) uninstaller[1].add(ul);
uninstaller[0].add(ul);
}
}
return uninstaller;
}
/**
* Informs all listeners.
*
* @param listeners list with the listener objects
* @param action identifier which callback should be called
* @param param parameter for the call
* @param handler the current progress handler
*/
private void informListeners(
List listeners, int action, Object param, AbstractUIProgressHandler handler) {
// Iterate the action list.
Iterator iter = listeners.iterator();
UninstallerListener il = null;
while (iter.hasNext()) {
try {
il = (UninstallerListener) iter.next();
switch (action) {
case UninstallerListener.BEFORE_DELETION:
il.beforeDeletion((List) param, handler);
break;
case UninstallerListener.AFTER_DELETION:
il.afterDeletion((List) param, handler);
break;
case UninstallerListener.BEFORE_DELETE:
il.beforeDelete((File) param, handler);
break;
case UninstallerListener.AFTER_DELETE:
il.afterDelete((File) param, handler);
break;
}
} catch (Throwable e) { // Catch it to prevent for a block of uninstallation.
handler.emitError(
"Skipping custom action because exception caught during " + il.getClass().getName(),
e.toString());
}
}
}