Constructor Detail

• CollectionUtils

  public CollectionUtils()

Method Detail

• copyOfOrEmpty

  public static <T> com.google.common.collect.ImmutableList<T> copyOfOrEmpty(@Nullable
                                                             List<T> input)

  Creates an immutable list with the elements of the given list. If the input list is null, it returns an empty list.

  Parameters:

  input - The list used to build the immutable one.

  Returns:

  An immutable list with the elements of the given list.

• copyOfOrEmpty

  public static <T> com.google.common.collect.ImmutableSet<T> copyOfOrEmpty(@Nullable
                                                            Set<T> input)

  Creates an immutable set with the elements of the given set. If the input set is null, it returns an empty set.

  Parameters:

  input - The set used to build the immutable one.

  Returns:

  An immutable set with the elements of the given set.

• copyOfOrEmpty

  public static <K,V> com.google.common.collect.ImmutableMap<K,V> copyOfOrEmpty(@Nullable
                                                                Map<K,V> input)

  Creates an immutable map with the elements of the given map. If the input map is null, it returns an empty map.

  Parameters:

  input - The map used to build the immutable one.

  Returns:

  An immutable map with the elements of the given map.