public void onOutputChanged() {
// notify listeners
List<TransformerChangeListener> listeners = getAllListeners();
for (TransformerChangeListener listener : listeners) {
listener.onOutputChanged(this, _outputColumns);
}
}
/** Notification method invoked when transformer is removed. */
@Override
protected void onRemovedInternal() {
List<TransformerChangeListener> listeners = getAllListeners();
for (TransformerChangeListener listener : listeners) {
listener.onOutputChanged(this, new LinkedList<MutableInputColumn<?>>());
listener.onRemove(this);
}
}
@Override
public void onRequirementChanged() {
super.onRequirementChanged();
List<TransformerChangeListener> listeners = getAllListeners();
for (TransformerChangeListener listener : listeners) {
listener.onRequirementChanged(this);
}
}
@Override
public void onConfigurationChanged() {
super.onConfigurationChanged();
// trigger getOutputColumns which will notify consumers in the case of
// output changes
if (isConfigured()) {
getOutputColumns();
}
List<TransformerChangeListener> listeners = getAllListeners();
for (TransformerChangeListener listener : listeners) {
listener.onConfigurationChanged(this);
}
}