private <PSIC> String onEvent(PSIC targetThreshhold, Object observer, ObserveEvent.Type obsType) { if (observer != null && (observer.getClass().getName().contains("org.python") || observer.getClass().getName().contains("org.jruby"))) { observer = new ObserverCallBack(observer, obsType); } if (!(targetThreshhold instanceof Integer)) { Image img = Image.getImageFromTarget(targetThreshhold); Boolean response = true; if (!img.isValid() && img.hasIOException()) { response = handleImageMissing(img, false); if (response == null) { runTime.abortScripting("onEvent(" + obsType.name() + "): Abort:", "ImageMissing: " + targetThreshhold.toString()); } } } String name = Observing.add(this, (ObserverCallBack) observer, obsType, targetThreshhold); log(lvl, "%s: observer %s %s: %s with: %s", toStringShort(), obsType, (observer == null ? "" : " with callback"), name, targetThreshhold); return name; }