package org.simantics.g3d.property;

import java.util.Collections;
import java.util.List;

import org.simantics.g3d.property.annotations.PropertyContributor;

public class PropertyTabUtil {
	
	
	@SuppressWarnings("unchecked")
	public static List<PropertyTabContributor> getContributors(Object input) {
		PropertyTabContributorFactory factory = resolveFactory(input.getClass());
		if (factory == null)
			return Collections.EMPTY_LIST;
		return factory.getContributors(input);
	}
	
	private static PropertyTabContributorFactory resolveFactory(Class<?> clazz) {
		PropertyContributor contributor = clazz.getAnnotation(PropertyContributor.class);
		if (contributor != null)
			try {
				return contributor.value().newInstance();
			} catch (InstantiationException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			}
		Class<?> superClass = clazz.getSuperclass();
		if (superClass != null)
			return resolveFactory(superClass);
		return null;
	}

}