Constructor Detail

• ListUtils

  public ListUtils()

Method Detail

• containAtleastOneObject

  public static <T> boolean containAtleastOneObject(List<T> toSearch,
                                    List<T> search)

  This Method look in the List toSearch if at least one Object exists in the List search.

  Type Parameters:

  T - the generic type

  Parameters:

  toSearch - The List to search.

  search - The List to inspect.

  Returns:

  Returns true if there is at least one Object equal from the two List otherwise false.

• getFirst

  public static <T> T getFirst(List<T> list)

  Gets the first object from the given List.

  Type Parameters:

  T - the generic type

  Parameters:

  list - the List.

  Returns:

  Returns the first object from the given List or null if the List is empty or null.

• getLast

  public static <T> T getLast(List<T> list)

  Gets the last object from the given List.

  Type Parameters:

  T - the generic type

  Parameters:

  list - the List.

  Returns:

  Returns the last object from the given List or null if the List is empty or null.

• getModifiedCollections

  public static <T> ModifiedCollections<T> getModifiedCollections(Collection<T> previous,
                                                  Collection<T> next)

  Gets the modified lists. finding from an old list which elements have been removed and which have been added.

  Type Parameters:

  T - the generic type

  Parameters:

  previous - the previous collection i.e. the collection from database.

  next - the next collection i.e. the current collection in the view.

  Returns:

  's the ModifiedLists in which the lists are keeped.

• getSameElementsFromLists

  public static <T> List<T> getSameElementsFromLists(List<T> toSearch,
                                     List<T> search)

  The Method looks at both List and if they have same objects they are added to one List and will returns the result.

  Type Parameters:

  T - the generic type

  Parameters:

  toSearch - The List to search.

  search - The List to inspect.

  Returns:

  The List with the same objects.

• isEmpty

  public static <T> boolean isEmpty(List<T> list)

  Checks if a List is null or empty.

  Type Parameters:

  T - the generic type

  Parameters:

  list - The List to check.

  Returns:

  true if the list is null or empty otherwise false.

• newRangeArray

  public static Integer[] newRangeArray(int start,
                        int end)

  Creates a new Integer array with the given range that is defined through start and end. For instance if the start is 5 and the end is 9 the resulted array will be [5,6,7,8,9]

  Parameters:

  start - The number to start

  end - The number to end minus one

  Returns:

  the generated Integer array

  Throws:

  IllegalArgumentException - when start greater than end.

• newRangeList

  public static List<Integer> newRangeList(int start,
                           int end)

  Creates a new Integer List with the given range that is defined through start and end. For instance if the start is 5 and the end is 9 the resulted List will be [5,6,7,8,9]

  Parameters:

  start - The number to start

  end - The number to end minus one

  Returns:

  the generated Integer List

  Throws:

  IllegalArgumentException - when start greater than end.

• printCollection

  public static <T> void printCollection(Collection<T> collection)

  Helper-Method for printing a Collection in the console.

  Type Parameters:

  T - the generic type

  Parameters:

  collection - The Collection to print.

• removeFirst

  public static <T> T removeFirst(List<T> list)

  Removes the first object from the given List.

  Type Parameters:

  T - the generic type

  Parameters:

  list - the List.

  Returns:

  Removes and returns the first object from the given List or null if the List is empty or null.

• removeLast

  public static <T> T removeLast(List<T> list)

  Removes the last object from the given List.

  Type Parameters:

  T - the generic type

  Parameters:

  list - the List.

  Returns:

  Removes and returns the last object from the given List or null if the List is empty or null.

• removeLastValues

  public static <T> List<T> removeLastValues(ArrayList<T> v,
                             int remove)

  The Method removeLastValues(ArrayList, int) remove the last Values.

  Type Parameters:

  T - the generic type

  Parameters:

  v - The Vector with the received Messages.

  remove - How much to remove.

  Returns:

  the list

• revertOrder

  public static <T> List<T> revertOrder(List<T> listToRevert)

  Reverts the order from the given List.

  Type Parameters:

  T - the generic type

  Parameters:

  listToRevert - The List to revert.

  Returns:

  The reverted List.

• splitListToParts

  public static <T> List<List<T>> splitListToParts(List<T> list,
                                   int times)

  Splits the List to Parts to the specified times.

  Type Parameters:

  T - the generic type

  Parameters:

  list - The List to Split

  times - How to split.

  Returns:

  An List with the Splitted Parts

• splitSetToParts

  public static <T> List<List<T>> splitSetToParts(Set<T> set,
                                  int times)

  Splits the Set to Parts to the specified times.

  Type Parameters:

  T - the generic type

  Parameters:

  set - The Set to Split

  times - How to split.

  Returns:

  An ArrayList with the Splitted Parts

• toObjectArray

  @SafeVarargs
  public static <T> Object[] toObjectArray(T... t)

  Converts the given parameters to an object array.

  Type Parameters:

  T - the generic type

  Parameters:

  t - The objects that will be in the returned object array

  Returns:

  An Object array.