Package org.gcube.informationsystem.dag

Interface NodeInformation<T>

  • Type Parameters:
    T - The type of the element.
    All Known Subinterfaces:
    TypeInformation<T>
    All Known Implementing Classes:
    ClassInformation, SchemaTypeInformation
    public interface NodeInformation<T>
    An interface for extracting identification and relationship information from elements to be used in a Dag.
    Author:
    Luca Frosini (ISTI - CNR)

    • Method Detail

      • getIdentifier

        String getIdentifier​(T t)
        Returns a unique identifier for the given element.
        Parameters:
        t - The element.
        Returns:
        The unique identifier.

      • getParentIdentifiers

        List<String> getParentIdentifiers​(T root,
                                  T t)
        Returns the identifiers of the parents of the given element, in the order that decides precedence among them.

        A List because the order is read: Dag.addNode(Object) takes the first parent when the DAG does not allow multiple inheritance, so which one comes first decides where the node is attached. A Set would leave that to the implementation's choice of collection.

        Parameters:
        root - The root element of the DAG.
        t - The element.
        Returns:
        The parent identifiers, most significant first.