Constructor Detail

• ValidationUtils

  public ValidationUtils()

Method Detail

• nonNull

  public static <T> T nonNull​(T object)

  Checks that an Object object is not null and returns the same object or throws an IllegalArgumentException

  Parameters:

  object - any Object

  Returns:

  the same object

  Throws:

  IllegalArgumentException - if a o == null

• nonNull

  public static <T> T nonNull​(T object,
                              String nameOfObject)

  Checks that an Object is not null and returns the same object or throws an IllegalArgumentException

  Parameters:

  object - any Object

  nameOfObject - the name of the object that is being checked for null. ( is used in the exception thrown when o == null.)

  Returns:

  the same object

  Throws:

  IllegalArgumentException - if a o == null

• nonNull

  public static <T> T nonNull​(T object,
                              Supplier<String> message)

  Checks that an Object is not null and returns the same object or throws an IllegalArgumentException

  Parameters:

  object - any Object

  message - the text message that would be passed to the exception thrown when o == null.

  Returns:

  the same object

  Throws:

  IllegalArgumentException - if a o == null

• nonEmpty

  public static <T extends Collection<?>> T nonEmpty​(T collection,
                                                     String nameOfObject)

  Checks that a Collection is not null and that it is not empty. If it's non-null and non-empty it returns the input, otherwise it throws an IllegalArgumentException

  Parameters:

  collection - any Collection

  nameOfObject - the name of the object that is being checked for non-emptiness. ( is used in the exception thrown when o.isEmpty().)

  Returns:

  the original collection

  Throws:

  IllegalArgumentException - if collection is null or empty

• isNonEmpty

  public static boolean isNonEmpty​(Collection<?> collection)

  Checks that a Collection is not null and that it is not empty. If it's non-null and non-empty it returns the true

  Parameters:

  collection - any Collection

  Returns:

  true if the collection exists and has elements

• nonEmpty

  public static String nonEmpty​(String string,
                                String nameOfObject)

  Checks that a String is not null and that it is not empty. If it's non-null and non-empty it returns the input, otherwise it throws an IllegalArgumentException

  Parameters:

  string - any String

  nameOfObject - a message to include in the output

  Returns:

  the original string

  Throws:

  IllegalArgumentException - if string is null or empty

• nonEmpty

  public static String nonEmpty​(String string)

  Checks that a String is not null and that it is not empty. If it's non-null and non-empty it returns the input, otherwise it throws an IllegalArgumentException

  Parameters:

  string - any String

  Returns:

  the original string

  Throws:

  IllegalArgumentException - if string is null or empty

• nonEmpty

  public static <I,​T extends Collection<I>> T nonEmpty​(T collection)

  Checks that a Collection is not null and that it is not empty. If it's non-null and non-empty it returns the input, otherwise it throws an IllegalArgumentException

  Parameters:

  collection - any Collection

  Returns:

  the original collection

  Throws:

  IllegalArgumentException - if collection is null or empty

• validateArg

  public static void validateArg​(boolean condition,
                                 String msg)

• validateArg

  public static void validateArg​(boolean condition,
                                 Supplier<String> msg)