package visionCore.util;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
public class Lists {
public static <T> void addAll(List<T> list, T[] array) {
if (list instanceof ArrayList) {
ArrayList<T> a = (ArrayList<T>)list;
a.ensureCapacity(a.size()+array.length);
}
for (T t : array) {
list.add(t);
}
}
public static <T> void addAll(List<T> list, int index, T[] array) {
if (list instanceof ArrayList) {
// way less array copying due to element shifts
List<T> buf = asArrayList(array);
list.addAll(index, buf);
} else {
for (int i = 0; i < array.length; i++) {
list.add(index+i, array[i]);
}
}
}
public static <T> T getLast(List<T> list) {
if (!list.isEmpty()) {
return list.get(list.size()-1);
}
return null;
}
public static <T> T removeLast(List<T> list) {
if (!list.isEmpty()) {
return list.remove(list.size()-1);
}
return null;
}
public static <T> List<T> asList(T[] array) {
return asArrayList(array);
}
public static <T> ArrayList<T> asArrayList(T[] array) {
ArrayList<T> list = new ArrayList<T>(array.length);
addAll(list, array);
return list;
}
public static <T> LinkedList<T> asLinkedList(T[] array) {
LinkedList<T> list = new LinkedList<T>();
addAll(list, array);
return list;
}
}
