public List<String> buildPropsFromList(Map<String, String> props){
		List<String> notFound = new LinkedList<String>();
		for(String key : props.keySet()){
			Class<? extends Property> propType = PropertyFactory.getPropByType( props.get(key));
			if(propType != null)
				this.addProperty(key, props.get(key));
			else
				notFound.add(key);
		}
		
		return notFound;
		
	}