Class IdentityList

PCGen-base/code/src/java/pcgen/base/util/IdentityList.java:38–329

IdentityList is an implementation of the List Interface that uses Identity (==) rather than equality (.equals() ) to establish behavior for remove. This is useful to maintain an input ordered identity list (not possible with IdentityHashMap because it does not maintain input order). @param

 *            The type of object stored in this IdentityList
 */
@SuppressWarnings("PMD.TooManyMethods")
public class IdentityList<T> implements List<T>
{
	/**
	 * The underlying map providing storage of Identity structures.
	 */
	private final List<Identity<T>> embeddedList =
			new LinkedList<>();

	/**
	 * Creates a new (empty) IdentityList.
	 */
	public IdentityList()
	{
		super();
	}

	/**
	 * Creates a new IdentityList which will be initialized with the contents
	 * of the given List.
	 * 
	 * @param list
	 *            The list of objects used to initialize the contents of this
	 *            IdentityList
	 */
	public IdentityList(List<T> list)
	{
		addAll(list);
	}

	@Override
	public void add(int index, T element)
	{
		embeddedList.add(index, Identity.valueOf(element));
	}

	@Override
	public final boolean add(T element)
	{
		return embeddedList.add(Identity.valueOf(element));
	}

	@Override
	public final boolean addAll(Collection<? extends T> collection)
	{
		collection.forEach(this::add);
		return true;
	}

	@Override
	public boolean addAll(int index, Collection<? extends T> collection)
	{
		int location = index;
		for (T element : collection)
		{
			add(location++, element);
		}
		return true;