@Override
public ImmutableList<E> subList(int fromIndex, int toIndex) {
Preconditions.checkPositionIndexes(fromIndex, toIndex, size);
return (fromIndex == toIndex)
? ImmutableList.<E>of()
: new RegularImmutableList<E>(array, offset + fromIndex, toIndex - fromIndex);
}
private static <E> ImmutableList<E> copyOfInternal(ArrayList<? extends E> list) {
return (list.isEmpty())
? ImmutableList.<E>of()
: new RegularImmutableList<E>(nullChecked(list.toArray()));
}
private static <E> ImmutableList<E> copyOfInternal(Collection<? extends E> collection) {
int size = collection.size();
return (size == 0)
? ImmutableList.<E>of()
: ImmutableList.<E>createFromIterable(collection, size);
}
/**
* Returns an immutable list containing the given elements, in order.
*
* @throws NullPointerException if any of {@code elements} is null
*/
public static <E> ImmutableList<E> of(E... elements) {
return (elements.length == 0)
? ImmutableList.<E>of()
: new RegularImmutableList<E>(copyIntoArray(elements));
}