Package org.apache.commons.collections4.map

Class UnmodifiableEntrySet<K,V>

java.lang.Object

org.apache.commons.collections4.collection.AbstractCollectionDecorator<Map.Entry<K,V>>

org.apache.commons.collections4.set.AbstractSetDecorator<Map.Entry<K,V>>

org.apache.commons.collections4.map.UnmodifiableEntrySet<K,V>

Type Parameters:

K - the type of the keys in the map

V - the type of the values in the map

All Implemented Interfaces:

Serializable, Iterable<Map.Entry<K,V>>, Collection<Map.Entry<K,V>>, Set<Map.Entry<K,V>>, Unmodifiable

public final class UnmodifiableEntrySet<K,V>
extends AbstractSetDecorator<Map.Entry<K,V>>
implements Unmodifiable

Decorates a map entry Set to ensure it can't be altered.

Attempts to modify it will result in an UnsupportedOperationException.

Since:

3.0

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	UnmodifiableEntrySet.UnmodifiableEntry	Implementation of a map entry that is unmodifiable.
private class	UnmodifiableEntrySet.UnmodifiableEntrySetIterator	Implementation of an entry set iterator.

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID	Serialization version

Constructor Summary

Constructors

Modifier	Constructor	Description
private	UnmodifiableEntrySet(Set<Map.Entry<K,V>> set)	Constructor that wraps (not copies).

Method Summary

Modifier and Type	Method	Description
boolean	add(Map.Entry<K,V> object)
boolean	addAll(Collection<? extends Map.Entry<K,V>> coll)
void	clear()
Iterator<Map.Entry<K,V>>	iterator()
boolean	remove(Object object)
boolean	removeAll(Collection<?> coll)
boolean	removeIf(Predicate<? super Map.Entry<K,V>> filter)
boolean	retainAll(Collection<?> coll)
Object[]	toArray()
<T> T[]	toArray(T[] array)
static <K, V> Set<Map.Entry<K,V>>	unmodifiableEntrySet(Set<Map.Entry<K,V>> set)	Factory method to create an unmodifiable set of Map Entry objects.

Methods inherited from class org.apache.commons.collections4.set.AbstractSetDecorator

decorated, equals, hashCode

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

contains, containsAll, isEmpty, setCollection, size, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

parallelStream, stream

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

contains, containsAll, isEmpty, size, spliterator

Field Details

serialVersionUID

private static final long serialVersionUID

Serialization version

See Also:

• Constant Field Values

Constructor Details

UnmodifiableEntrySet

private UnmodifiableEntrySet(Set<Map.Entry<K,V>> set)

Constructor that wraps (not copies).

Parameters:

set - the set to decorate, must not be null

Throws:

NullPointerException - if set is null

Method Details

unmodifiableEntrySet

public static <K,
V> Set<Map.Entry<K,V>> unmodifiableEntrySet(Set<Map.Entry<K,V>> set)

Factory method to create an unmodifiable set of Map Entry objects.

Type Parameters:

K - the key type

V - the value type

Parameters:

set - the set to decorate, must not be null

Returns:

a new unmodifiable entry set

Throws:

NullPointerException - if set is null

Since:

4.0

add

public boolean add(Map.Entry<K,V> object)

Specified by:

add in interface Collection<K>

Specified by:

add in interface Set<K>

Overrides:

add in class AbstractCollectionDecorator<Map.Entry<K,V>>

addAll

public boolean addAll(Collection<? extends Map.Entry<K,V>> coll)

Specified by:

addAll in interface Collection<K>

Specified by:

addAll in interface Set<K>

Overrides:

addAll in class AbstractCollectionDecorator<Map.Entry<K,V>>

clear

public void clear()

Specified by:

clear in interface Collection<K>

Specified by:

clear in interface Set<K>

Overrides:

clear in class AbstractCollectionDecorator<Map.Entry<K,V>>

remove

public boolean remove(Object object)

Specified by:

remove in interface Collection<K>

Specified by:

remove in interface Set<K>

Overrides:

remove in class AbstractCollectionDecorator<Map.Entry<K,V>>

removeIf

public boolean removeIf(Predicate<? super Map.Entry<K,V>> filter)

Specified by:

removeIf in interface Collection<K>

Overrides:

removeIf in class AbstractCollectionDecorator<Map.Entry<K,V>>

Since:

4.4

removeAll

public boolean removeAll(Collection<?> coll)

Specified by:

removeAll in interface Collection<K>

Specified by:

removeAll in interface Set<K>

Overrides:

removeAll in class AbstractCollectionDecorator<Map.Entry<K,V>>

retainAll

public boolean retainAll(Collection<?> coll)

Specified by:

retainAll in interface Collection<K>

Specified by:

retainAll in interface Set<K>

Overrides:

retainAll in class AbstractCollectionDecorator<Map.Entry<K,V>>

iterator

public Iterator<Map.Entry<K,V>> iterator()

Specified by:

iterator in interface Collection<K>

Specified by:

iterator in interface Iterable<K>

Specified by:

iterator in interface Set<K>

Overrides:

iterator in class AbstractCollectionDecorator<Map.Entry<K,V>>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<K>

Specified by:

toArray in interface Set<K>

Overrides:

toArray in class AbstractCollectionDecorator<Map.Entry<K,V>>

toArray

public <T> T[] toArray(T[] array)

Specified by:

toArray in interface Collection<K>

Specified by:

toArray in interface Set<K>

Overrides:

toArray in class AbstractCollectionDecorator<Map.Entry<K,V>>