Constructor Detail

• Entity

  protected Entity(int id)

• Entity

  protected Entity()

Method Detail

• getId

  public int getId()

  Get the unique id of this entity. This unique id is used for example as a key in Maps and for cross-referencing in XML files.

  Returns:

  unique id.

• hashCode

  public int hashCode()

  Overrides:

  hashCode in class Object

• equals

  public boolean equals(Object o)

  Two Entitys are equal if they have the same getId().

  Overrides:

  equals in class Object

• sortById

  public static <T extends Entity,L extends List<T>> L sortById(L list)

  Helper method to sort a list of entities by ascending id.

  Parameters:

  list - a list of entities that will be sorted in-place.

  Returns:

  the sorted list

• idMap

  public static <T extends Entity> HashMap<Integer,T> idMap(Collection<T> values)

  Helper method to create a id-to-entity map from a collection of entities.

  Parameters:

  values - a collection of entities

  Returns:

  a id-to-entity map