org.apache.commons.collections4.set

## Class PredicatedNavigableSet<E>

- java.lang.Object
- - org.apache.commons.collections4.collection.AbstractCollectionDecorator<E>
  - - org.apache.commons.collections4.collection.PredicatedCollection<E>
    - - org.apache.commons.collections4.set.PredicatedSet<E>
      - - org.apache.commons.collections4.set.PredicatedSortedSet<E>
        - - org.apache.commons.collections4.set.PredicatedNavigableSet<E>

- Type Parameters:
    `E` - the type of the elements in this set
  All Implemented Interfaces:
    Serializable, Iterable<E>, Collection<E>, NavigableSet<E>, Set<E>, SortedSet<E>

      public class PredicatedNavigableSet<E>
      extends PredicatedSortedSet<E>
      implements NavigableSet<E>

  Decorates another `NavigableSet` to validate that all additions match a specified predicate.

  This set exists to provide validation for the decorated set. It is normally created to decorate an empty set. If an object cannot be added to the set, an IllegalArgumentException is thrown.

  One usage would be to ensure that no null entries are added to the set.

       NavigableSet set =
         PredicatedSortedSet.predicatedNavigableSet(new TreeSet(),
                                                    NotNullPredicate.notNullPredicate());

  Since:
    4.1
  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.commons.collections4.collection.PredicatedCollection

      `PredicatedCollection.Builder<E>`

  - ### Field Summary

    - ### Fields inherited from class org.apache.commons.collections4.collection.PredicatedCollection

      `predicate`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `PredicatedNavigableSet(NavigableSet<E> set, Predicate<? super E> predicate)` Constructor that wraps (not copies).

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `E` | `ceiling(E e)`
    `protected NavigableSet<E>` | `decorated()` Gets the navigable set being decorated.
    `Iterator<E>` | `descendingIterator()`
    `NavigableSet<E>` | `descendingSet()`
    `E` | `floor(E e)`
    `NavigableSet<E>` | `headSet(E toElement, boolean inclusive)`
    `E` | `higher(E e)`
    `E` | `lower(E e)`
    `E` | `pollFirst()`
    `E` | `pollLast()`
    `static <E> PredicatedNavigableSet<E>` | `predicatedNavigableSet(NavigableSet<E> set, Predicate<? super E> predicate)` Factory method to create a predicated (validating) navigable set.
    `NavigableSet<E>` | `subSet(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)`
    `NavigableSet<E>` | `tailSet(E fromElement, boolean inclusive)`

    - ### Methods inherited from class org.apache.commons.collections4.set.PredicatedSortedSet

      `comparator, first, headSet, last, predicatedSortedSet, subSet, tailSet`

    - ### Methods inherited from class org.apache.commons.collections4.set.PredicatedSet

      `equals, hashCode, predicatedSet`

    - ### Methods inherited from class org.apache.commons.collections4.collection.PredicatedCollection

      `add, addAll, builder, notNullBuilder, predicatedCollection, validate`

    - ### Methods inherited from class org.apache.commons.collections4.collection.AbstractCollectionDecorator

      `clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, setCollection, size, toArray, toArray, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface java.util.NavigableSet

      `headSet, iterator, subSet, tailSet`

    - ### Methods inherited from interface java.util.SortedSet

      `comparator, first, last, spliterator`

    - ### Methods inherited from interface java.util.Set

      `add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, size, toArray, toArray`

    - ### Methods inherited from interface java.util.Collection

      `parallelStream, removeIf, stream`

    - ### Methods inherited from interface java.lang.Iterable

      `forEach`

- - ### Constructor Detail

    - #### PredicatedNavigableSet

          protected PredicatedNavigableSet(NavigableSet<E> set,
                                           Predicate<? super E> predicate)

      Constructor that wraps (not copies).

      If there are any elements already in the set being decorated, they are validated.

      Parameters:
        `set` - the set to decorate, must not be null
        `predicate` - the predicate to use for validation, must not be null
      Throws:
        `NullPointerException` - if set or predicate is null
        `IllegalArgumentException` - if the set contains invalid elements

  - ### Method Detail

    - #### predicatedNavigableSet

          public static <E> PredicatedNavigableSet<E> predicatedNavigableSet(NavigableSet<E> set,
                                                                             Predicate<? super E> predicate)

      Factory method to create a predicated (validating) navigable set.

      If there are any elements already in the set being decorated, they are validated.

      Type Parameters:
        `E` - the element type
      Parameters:
        `set` - the set to decorate, must not be null
        `predicate` - the predicate to use for validation, must not be null
      Returns:
        a new predicated navigable set.
      Throws:
        `NullPointerException` - if set or predicate is null
        `IllegalArgumentException` - if the set contains invalid elements
      Since:
        4.0

    - #### decorated

          protected NavigableSet<E> decorated()

      Gets the navigable set being decorated.
      Overrides:
        `decorated` in class `PredicatedSortedSet<E>`
      Returns:
        the decorated navigable set

    - #### lower

          public E lower(E e)

      Specified by:
        `lower` in interface `NavigableSet<E>`

    - #### floor

          public E floor(E e)

      Specified by:
        `floor` in interface `NavigableSet<E>`

    - #### ceiling

          public E ceiling(E e)

      Specified by:
        `ceiling` in interface `NavigableSet<E>`

    - #### higher

          public E higher(E e)

      Specified by:
        `higher` in interface `NavigableSet<E>`

    - #### pollFirst

          public E pollFirst()

      Specified by:
        `pollFirst` in interface `NavigableSet<E>`

    - #### pollLast

          public E pollLast()

      Specified by:
        `pollLast` in interface `NavigableSet<E>`

    - #### descendingSet

          public NavigableSet<E> descendingSet()

      Specified by:
        `descendingSet` in interface `NavigableSet<E>`

    - #### descendingIterator

          public Iterator<E> descendingIterator()

      Specified by:
        `descendingIterator` in interface `NavigableSet<E>`

    - #### subSet

          public NavigableSet<E> subSet(E fromElement,
                                        boolean fromInclusive,
                                        E toElement,
                                        boolean toInclusive)

      Specified by:
        `subSet` in interface `NavigableSet<E>`

    - #### headSet

          public NavigableSet<E> headSet(E toElement,
                                         boolean inclusive)

      Specified by:
        `headSet` in interface `NavigableSet<E>`

    - #### tailSet

          public NavigableSet<E> tailSet(E fromElement,
                                         boolean inclusive)

      Specified by:
        `tailSet` in interface `NavigableSet<E>`

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