Class MergedAnnotationPredicates

Method Detail

• typeIn

  public static <A extends Annotation> Predicate<MergedAnnotation<? extends A>> typeIn​(String... typeNames)

  Create a new Predicate that evaluates to true if the name of the merged annotation type is contained in the specified array.

  Type Parameters:

  A - the annotation type

  Parameters:

  typeNames - the names that should be matched

  Returns:

  a Predicate to test the annotation type

• typeIn

  public static <A extends Annotation> Predicate<MergedAnnotation<? extends A>> typeIn​(Class<?>... types)

  Create a new Predicate that evaluates to true if the merged annotation type is contained in the specified array.

  Type Parameters:

  A - the annotation type

  Parameters:

  types - the types that should be matched

  Returns:

  a Predicate to test the annotation type

• typeIn

  public static <A extends Annotation> Predicate<MergedAnnotation<? extends A>> typeIn​(Collection<?> types)

  Create a new Predicate that evaluates to true if the merged annotation type is contained in the specified collection.

  Type Parameters:

  A - the annotation type

  Parameters:

  types - the type names or classes that should be matched

  Returns:

  a Predicate to test the annotation type

• firstRunOf

  public static <A extends Annotation> Predicate<MergedAnnotation<A>> firstRunOf​(Function<? super MergedAnnotation<A>,​?> valueExtractor)

  Create a new stateful, single use Predicate that matches only the first run of an extracted value. For example, MergedAnnotationPredicates.firstRunOf(MergedAnnotation::distance) will match the first annotation, and any subsequent runs that have the same distance.

  NOTE: This predicate only matches the first run. Once the extracted value changes, the predicate always returns false. For example, if you have a set of annotations with distances [1, 1, 2, 1] then only the first two will match.

  Parameters:

  valueExtractor - function used to extract the value to check

  Returns:

  a Predicate that matches the first run of the extracted values

• unique

  public static <A extends Annotation,​K> Predicate<MergedAnnotation<A>> unique​(Function<? super MergedAnnotation<A>,​K> keyExtractor)

  Create a new stateful, single use Predicate that matches annotations that are unique based on the extracted key. For example MergedAnnotationPredicates.unique(MergedAnnotation::getType) will match the first time a unique type is encountered.

  Parameters:

  keyExtractor - function used to extract the key used to test for uniqueness

  Returns:

  a Predicate that matches a unique annotation based on the extracted key