E
- The type of elements in this collection.public abstract class DelegateCollection<E> extends AbstractCollection<E>
DelegateCollection
contains some other Collection
, to which
it delegates its method calls, possibly transforming the data along the way
or providing additional functionality. The class DelegateCollection
itself simply overrides all methods of AbstractCollection
with
versions that pass all requests to the target Collection
. Subclasses
of DelegateCollection
may further override some of these methods and
may also provide additional methods and fields.Modifier and Type | Field and Description |
---|---|
protected Collection |
target
The target
Collection . |
Modifier | Constructor and Description |
---|---|
protected |
DelegateCollection()
Creates a new
DelegateCollection with a null target. |
|
DelegateCollection(Collection<E> target)
Creates a new
DelegateCollection with the specified target
Collection . |
Modifier and Type | Method and Description |
---|---|
boolean |
add(E e) |
boolean |
addAll(Collection<? extends E> c) |
void |
clear() |
boolean |
contains(Object o) |
boolean |
containsAll(Collection<?> c) |
boolean |
equals(Object obj) |
void |
forEach(Consumer<? super E> action) |
int |
hashCode() |
boolean |
isEmpty() |
Iterator<E> |
iterator() |
Stream<E> |
parallelStream() |
boolean |
remove(Object o) |
boolean |
removeAll(Collection<?> c) |
boolean |
removeIf(Predicate<? super E> filter) |
boolean |
retainAll(Collection<?> c) |
int |
size() |
Spliterator<E> |
spliterator() |
Stream<E> |
stream() |
protected void |
superForEach(Consumer<? super E> action)
Protected method providing access to the default implementation of
Iterable.forEach(Consumer) . |
protected Stream<E> |
superParallelStream()
Protected method providing access to the default implementation of
Collection.parallelStream() . |
protected boolean |
superRemoveIf(Predicate<? super E> filter)
Protected method providing access to the default implementation of
Collection.removeIf(Predicate) . |
protected Spliterator<E> |
superSpliterator()
Protected method providing access to the default implementation of
Collection.spliterator() . |
protected Stream<E> |
superStream()
Protected method providing access to the default implementation of
Collection.stream() . |
Object[] |
toArray() |
<T> T[] |
toArray(T[] a) |
String |
toString() |
protected volatile Collection target
Collection
.public DelegateCollection(Collection<E> target)
DelegateCollection
with the specified target
Collection
.target
- The target Collection
.NullPointerException
- If the target Collection
is null.protected DelegateCollection()
DelegateCollection
with a null target.public int size()
size
in interface Collection<E>
size
in class AbstractCollection<E>
public boolean isEmpty()
isEmpty
in interface Collection<E>
isEmpty
in class AbstractCollection<E>
public boolean contains(Object o)
contains
in interface Collection<E>
contains
in class AbstractCollection<E>
public Iterator<E> iterator()
iterator
in interface Iterable<E>
iterator
in interface Collection<E>
iterator
in class AbstractCollection<E>
public Object[] toArray()
toArray
in interface Collection<E>
toArray
in class AbstractCollection<E>
public <T> T[] toArray(T[] a)
toArray
in interface Collection<E>
toArray
in class AbstractCollection<E>
public boolean add(E e)
add
in interface Collection<E>
add
in class AbstractCollection<E>
public boolean remove(Object o)
remove
in interface Collection<E>
remove
in class AbstractCollection<E>
public boolean containsAll(Collection<?> c)
containsAll
in interface Collection<E>
containsAll
in class AbstractCollection<E>
public boolean addAll(Collection<? extends E> c)
addAll
in interface Collection<E>
addAll
in class AbstractCollection<E>
public boolean removeAll(Collection<?> c)
removeAll
in interface Collection<E>
removeAll
in class AbstractCollection<E>
public boolean retainAll(Collection<?> c)
retainAll
in interface Collection<E>
retainAll
in class AbstractCollection<E>
public void clear()
clear
in interface Collection<E>
clear
in class AbstractCollection<E>
protected final void superForEach(Consumer<? super E> action)
Iterable.forEach(Consumer)
.action
- The action to be performed for each element.NullPointerException
- If the specified action is nullprotected final boolean superRemoveIf(Predicate<? super E> filter)
Collection.removeIf(Predicate)
.filter
- A predicate which returns true
for elements to be
removed.true
if any elements were removed.NullPointerException
- If the specified filter is null.UnsupportedOperationException
- If elements cannot be removed from
this collection. Implementations may throw this exception if a
matching element cannot be removed or if, in general, removal is
not supported.protected final Spliterator<E> superSpliterator()
Collection.spliterator()
.Spliterator
over the elements in this collection.public Spliterator<E> spliterator()
protected final Stream<E> superStream()
Collection.stream()
.Stream
over the elements in this collection.protected final Stream<E> superParallelStream()
Collection.parallelStream()
.Stream
over the elements in this
collection.public boolean equals(Object obj)
equals
in interface Collection<E>
equals
in class Object
public int hashCode()
hashCode
in interface Collection<E>
hashCode
in class Object
public String toString()
toString
in class AbstractCollection<E>
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