Class UnmodifiableQueue<E>
java.lang.Object
org.apache.commons.collections4.collection.AbstractCollectionDecorator<E>
org.apache.commons.collections4.queue.AbstractQueueDecorator<E>
org.apache.commons.collections4.queue.UnmodifiableQueue<E>
- Type Parameters:
E
- the type of elements held in this queue
- All Implemented Interfaces:
Serializable
,Iterable<E>
,Collection<E>
,Queue<E>
,Unmodifiable
Decorates another
Queue
to ensure it can't be altered.
Attempts to modify it will result in an UnsupportedOperationException.
- Since:
- 4.0
- See Also:
-
Method Summary
Modifier and TypeMethodDescriptionboolean
boolean
addAll
(Collection<? extends E> coll) void
clear()
iterator()
boolean
poll()
remove()
boolean
boolean
removeAll
(Collection<?> coll) boolean
boolean
retainAll
(Collection<?> coll) static <E> Queue<E>
unmodifiableQueue
(Queue<? extends E> queue) Factory method to create an unmodifiable queue.Methods inherited from class org.apache.commons.collections4.queue.AbstractQueueDecorator
decorated, element, peek
Methods inherited from class org.apache.commons.collections4.collection.AbstractCollectionDecorator
contains, containsAll, isEmpty, setCollection, size, toArray, toArray, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.util.Collection
contains, containsAll, equals, hashCode, isEmpty, parallelStream, size, spliterator, stream, toArray, toArray
-
Method Details
-
unmodifiableQueue
Factory method to create an unmodifiable queue.If the queue passed in is already unmodifiable, it is returned.
- Type Parameters:
E
- the type of the elements in the queue- Parameters:
queue
- the queue to decorate, must not be null- Returns:
- an unmodifiable Queue
- Throws:
NullPointerException
- if queue is null
-
add
- Specified by:
add
in interfaceCollection<E>
- Specified by:
add
in interfaceQueue<E>
- Overrides:
add
in classAbstractCollectionDecorator<E>
-
addAll
- Specified by:
addAll
in interfaceCollection<E>
- Overrides:
addAll
in classAbstractCollectionDecorator<E>
-
clear
- Specified by:
clear
in interfaceCollection<E>
- Overrides:
clear
in classAbstractCollectionDecorator<E>
-
iterator
- Specified by:
iterator
in interfaceCollection<E>
- Specified by:
iterator
in interfaceIterable<E>
- Overrides:
iterator
in classAbstractCollectionDecorator<E>
-
offer
-
poll
-
remove
-
remove
- Specified by:
remove
in interfaceCollection<E>
- Overrides:
remove
in classAbstractCollectionDecorator<E>
-
removeAll
- Specified by:
removeAll
in interfaceCollection<E>
- Overrides:
removeAll
in classAbstractCollectionDecorator<E>
-
removeIf
- Specified by:
removeIf
in interfaceCollection<E>
- Overrides:
removeIf
in classAbstractCollectionDecorator<E>
- Since:
- 4.4
-
retainAll
- Specified by:
retainAll
in interfaceCollection<E>
- Overrides:
retainAll
in classAbstractCollectionDecorator<E>
-