AttributeContainer

An attribute container is a container of attributes, which are strongly typed named entities. Such a container is responsible for storing and getting attributes in a type safe way. In particular, attributes are strongly typed, meaning that when we get a value from the container, the returned value type is inferred from the type of the attribute. In a way, an attribute container is similar to a java.util.Map where the entry is a "typed String" and the value is of the string type. However, the set of methods available to the container is much more limited. It is not allowed to have two attributes with the same name but different types in the container.