public PatternMatcherRootContent(RootContent parent, PatternMatcherRootContentKey key) {
super(parent);
this.children = new ContentChildren<PatternMatcherContent>();
this.taintListener = new ContentEngineTaintListener();
this.mapping = Maps.newHashMap();
this.key = key;
AdvancedIncQueryEngine engine = key.getEngine();
if (engine == null) {
key.setEngine(createEngine());
}
if (engine != null) {
engine.addLifecycleListener(taintListener);
}
}
