org.apache.tools.ant.util

## Class VectorSet<E>

- java.lang.Object
- - java.util.AbstractCollection<E>
  - - java.util.AbstractList<E>
    - - java.util.Vector<E>
      - - org.apache.tools.ant.util.VectorSet<E>

- All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.List<E>, java.util.RandomAccess

      public final class VectorSet<E>
      extends java.util.Vector<E>

  Subclass of Vector that won't store duplicate entries and shows HashSet's constant time performance characteristics for the contains method.

  This is not a general purpose class but has been written because the protected members of `DirectoryScanner` prohibited later revisions from using a more efficient collection.

  Methods are synchronized to keep Vector's contract.

  Since:
    Ant 1.8.0
  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from class java.util.Vector

      `capacityIncrement, elementCount, elementData`

    - ### Fields inherited from class java.util.AbstractList

      `modCount`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `VectorSet()`
    `VectorSet(java.util.Collection<? extends E> c)`
    `VectorSet(int initialCapacity)`
    `VectorSet(int initialCapacity, int capacityIncrement)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `add(E o)`
    `void` | `add(int index, E o)` This implementation may not add the element at the given index if it is already contained in the collection.
    `boolean` | `addAll(java.util.Collection<? extends E> c)`
    `boolean` | `addAll(int index, java.util.Collection<? extends E> c)` This implementation may not add all elements at the given index if any of them are already contained in the collection.
    `void` | `addElement(E o)`
    `void` | `clear()`
    `java.lang.Object` | `clone()`
    `boolean` | `contains(java.lang.Object o)`
    `boolean` | `containsAll(java.util.Collection<?> c)`
    `void` | `insertElementAt(E o, int index)`
    `E` | `remove(int index)`
    `boolean` | `remove(java.lang.Object o)`
    `boolean` | `removeAll(java.util.Collection<?> c)`
    `void` | `removeAllElements()`
    `boolean` | `removeElement(java.lang.Object o)`
    `void` | `removeElementAt(int index)`
    `void` | `removeRange(int fromIndex, int toIndex)`
    `boolean` | `retainAll(java.util.Collection<?> c)`
    `E` | `set(int index, E o)`
    `void` | `setElementAt(E o, int index)`

    - ### Methods inherited from class java.util.Vector

      `capacity, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, forEach, get, hashCode, indexOf, indexOf, isEmpty, iterator, lastElement, lastIndexOf, lastIndexOf, listIterator, listIterator, removeIf, replaceAll, setSize, size, sort, spliterator, subList, toArray, toArray, toString, trimToSize`

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

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

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

      `parallelStream, stream`

- - ### Constructor Detail

    - #### VectorSet

          public VectorSet()

    - #### VectorSet

          public VectorSet(int initialCapacity)

    - #### VectorSet

          public VectorSet(int initialCapacity,
                           int capacityIncrement)

    - #### VectorSet

          public VectorSet(java.util.Collection<? extends E> c)

  - ### Method Detail

    - #### add

          public boolean add(E o)

      Specified by:
        `add` in interface `java.util.Collection<E>`
      Specified by:
        `add` in interface `java.util.List<E>`
      Overrides:
        `add` in class `java.util.Vector<E>`

    - #### add

          public void add(int index,
                          E o)

      This implementation may not add the element at the given index if it is already contained in the collection.
      Specified by:
        `add` in interface `java.util.List<E>`
      Overrides:
        `add` in class `java.util.Vector<E>`

    - #### addElement

          public void addElement(E o)

      Overrides:
        `addElement` in class `java.util.Vector<E>`

    - #### addAll

          public boolean addAll(java.util.Collection<? extends E> c)

      Specified by:
        `addAll` in interface `java.util.Collection<E>`
      Specified by:
        `addAll` in interface `java.util.List<E>`
      Overrides:
        `addAll` in class `java.util.Vector<E>`

    - #### addAll

          public boolean addAll(int index,
                                java.util.Collection<? extends E> c)

      This implementation may not add all elements at the given index if any of them are already contained in the collection.
      Specified by:
        `addAll` in interface `java.util.List<E>`
      Overrides:
        `addAll` in class `java.util.Vector<E>`

    - #### clear

          public void clear()

      Specified by:
        `clear` in interface `java.util.Collection<E>`
      Specified by:
        `clear` in interface `java.util.List<E>`
      Overrides:
        `clear` in class `java.util.Vector<E>`

    - #### clone

          public java.lang.Object clone()

      Overrides:
        `clone` in class `java.util.Vector<E>`

    - #### contains

          public boolean contains(java.lang.Object o)

      Specified by:
        `contains` in interface `java.util.Collection<E>`
      Specified by:
        `contains` in interface `java.util.List<E>`
      Overrides:
        `contains` in class `java.util.Vector<E>`

    - #### containsAll

          public boolean containsAll(java.util.Collection<?> c)

      Specified by:
        `containsAll` in interface `java.util.Collection<E>`
      Specified by:
        `containsAll` in interface `java.util.List<E>`
      Overrides:
        `containsAll` in class `java.util.Vector<E>`

    - #### insertElementAt

          public void insertElementAt(E o,
                                      int index)

      Overrides:
        `insertElementAt` in class `java.util.Vector<E>`

    - #### remove

          public E remove(int index)

      Specified by:
        `remove` in interface `java.util.List<E>`
      Overrides:
        `remove` in class `java.util.Vector<E>`

    - #### remove

          public boolean remove(java.lang.Object o)

      Specified by:
        `remove` in interface `java.util.Collection<E>`
      Specified by:
        `remove` in interface `java.util.List<E>`
      Overrides:
        `remove` in class `java.util.Vector<E>`

    - #### removeAll

          public boolean removeAll(java.util.Collection<?> c)

      Specified by:
        `removeAll` in interface `java.util.Collection<E>`
      Specified by:
        `removeAll` in interface `java.util.List<E>`
      Overrides:
        `removeAll` in class `java.util.Vector<E>`

    - #### removeAllElements

          public void removeAllElements()

      Overrides:
        `removeAllElements` in class `java.util.Vector<E>`

    - #### removeElement

          public boolean removeElement(java.lang.Object o)

      Overrides:
        `removeElement` in class `java.util.Vector<E>`

    - #### removeElementAt

          public void removeElementAt(int index)

      Overrides:
        `removeElementAt` in class `java.util.Vector<E>`

    - #### removeRange

          public void removeRange(int fromIndex,
                                  int toIndex)

      Overrides:
        `removeRange` in class `java.util.Vector<E>`

    - #### retainAll

          public boolean retainAll(java.util.Collection<?> c)

      Specified by:
        `retainAll` in interface `java.util.Collection<E>`
      Specified by:
        `retainAll` in interface `java.util.List<E>`
      Overrides:
        `retainAll` in class `java.util.Vector<E>`

    - #### set

          public E set(int index,
                       E o)

      Specified by:
        `set` in interface `java.util.List<E>`
      Overrides:
        `set` in class `java.util.Vector<E>`

    - #### setElementAt

          public void setElementAt(E o,
                                   int index)

      Overrides:
        `setElementAt` in class `java.util.Vector<E>`