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## org.eclipse.gemini.blueprint.service.importer.support.internal.collection
Class DynamicCollection<E>

    java.lang.Object
      java.util.AbstractCollection<E>
          org.eclipse.gemini.blueprint.service.importer.support.internal.collection.DynamicCollection<E>

All Implemented Interfaces:
  Iterable<E>, Collection<E>

Direct Known Subclasses:
  DynamicList, DynamicSet

    public class DynamicCollection<E>

extends AbstractCollection<E>

Collection which can be increased or reduced at runtime while iterating. Iterators returned by this implementation are consistent - it is guaranteed that `DynamicCollection.DynamicIterator.next()` will obey the result of the previously called `DynamicCollection.DynamicIterator.hasNext()` even though the collection content has been modified. This collection is thread-safe with the condition that there is at most one writing thread at a point in time. There are no restrains on the number of readers.

Author:
  Costin Leau

Nested Class Summary
`protected class` | `DynamicCollection.DynamicIterator` Dynamic consistent iterator.

Field Summary
`protected Map<DynamicCollection.DynamicIterator,Object>` | `iterators` should have been a list but there is no 'WeakReference'-based implementation in the JDK
`protected Object` | `iteratorsLock` If it interacts with the storage, the *storage* lock needs to be acquired first
`protected List<E>` | `storage` this list is not-synchronized by default

Constructor Summary
`DynamicCollection()`
`DynamicCollection(Collection<? extends E> c)`
`DynamicCollection(int size)`

Method Summary
`boolean` | `add(E o)`
`protected void` | `add(int index, E o)`
`boolean` | `addAll(Collection<? extends E> c)`
`void` | `clear()`
`boolean` | `contains(Object o)`
`boolean` | `containsAll(Collection<?> c)`
`protected int` | `indexOf(Object o)` Hook used by wrapping collections to determine the position of the object being removed while iterating.
`boolean` | `isEmpty()`
`Iterator<E>` | `iterator()`
`protected E` | `remove(int index)`
`boolean` | `remove(Object o)`
`int` | `size()`
`Object[]` | `toArray()`
`
`<T> T[]`
` | `toArray(T[] a)`
`String` | `toString()`

Methods inherited from class java.util.AbstractCollection
`removeAll, retainAll`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface java.util.Collection
`equals, hashCode`

Field Detail

### iteratorsLock

    protected final Object iteratorsLock

  If it interacts with the storage, the *storage* lock needs to be acquired first

### storage

    protected final List<E> storage

  this list is not-synchronized by default

### iterators

    protected final Map<DynamicCollection.DynamicIterator,Object> iterators

  should have been a list but there is no 'WeakReference'-based implementation in the JDK

Constructor Detail

### DynamicCollection

    public DynamicCollection()

### DynamicCollection

    public DynamicCollection(int size)

### DynamicCollection

    public DynamicCollection(Collection<? extends E> c)

Method Detail

### iterator

    public Iterator<E> iterator()

  Specified by:
    `iterator` in interface `Iterable<E>`
  Specified by:
    `iterator` in interface `Collection<E>`
  Specified by:
    `iterator` in class `AbstractCollection<E>`

### clear

    public void clear()

  Specified by:
    `clear` in interface `Collection<E>`
  Overrides:
    `clear` in class `AbstractCollection<E>`

### size

    public int size()

  Specified by:
    `size` in interface `Collection<E>`
  Specified by:
    `size` in class `AbstractCollection<E>`

### add

    public boolean add(E o)

  Specified by:
    `add` in interface `Collection<E>`
  Overrides:
    `add` in class `AbstractCollection<E>`

### addAll

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

  Specified by:
    `addAll` in interface `Collection<E>`
  Overrides:
    `addAll` in class `AbstractCollection<E>`

### contains

    public boolean contains(Object o)

  Specified by:
    `contains` in interface `Collection<E>`
  Overrides:
    `contains` in class `AbstractCollection<E>`

### containsAll

    public boolean containsAll(Collection<?> c)

  Specified by:
    `containsAll` in interface `Collection<E>`
  Overrides:
    `containsAll` in class `AbstractCollection<E>`

### isEmpty

    public boolean isEmpty()

  Specified by:
    `isEmpty` in interface `Collection<E>`
  Overrides:
    `isEmpty` in class `AbstractCollection<E>`

### remove

    public boolean remove(Object o)

  Specified by:
    `remove` in interface `Collection<E>`
  Overrides:
    `remove` in class `AbstractCollection<E>`

### remove

    protected E remove(int index)

### add

    protected void add(int index,
                       E o)

### toArray

    public Object[] toArray()

  Specified by:
    `toArray` in interface `Collection<E>`
  Overrides:
    `toArray` in class `AbstractCollection<E>`

### toArray

    public <T> T[] toArray(T[] a)

  Specified by:
    `toArray` in interface `Collection<E>`
  Overrides:
    `toArray` in class `AbstractCollection<E>`

### toString

    public String toString()

  Overrides:
    `toString` in class `AbstractCollection<E>`

### indexOf

    protected int indexOf(Object o)

  Hook used by wrapping collections to determine the position of the object being removed while iterating.

  Parameters:
    `o` -
  Returns:

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