Package org.apache.commons.collections4.map

Class UnmodifiableSortedMap<K,V>

java.lang.Object

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

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

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

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

Type Parameters:

K - The type of the keys in this map

V - The type of the values in this map

All Implemented Interfaces:

Serializable, Map<K,V>, SortedMap<K,V>, Get<K,V>, IterableGet<K,V>, IterableMap<K,V>, IterableSortedMap<K,V>, OrderedMap<K,V>, Put<K,V>, Unmodifiable

public final class UnmodifiableSortedMap<K,V>
extends AbstractSortedMapDecorator<K,V>
implements Unmodifiable, Serializable

Decorates another SortedMap to ensure it can't be altered.

This class is Serializable from Commons Collections 3.1.

Attempts to modify it will result in an UnsupportedOperationException.

Since:

3.0

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.collections4.map.AbstractSortedMapDecorator

AbstractSortedMapDecorator.SortedMapIterator<K,V>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Method Summary

Modifier and Type	Method	Description
void	clear()	Always throws UnsupportedOperationException.
Comparator<? super K>	comparator()
Set<Map.Entry<K,V>>	entrySet()	Gets a set view of the mappings contained in this map.
K	firstKey()	Gets the first key currently in this map.
SortedMap<K,V>	headMap(K toKey)
Set<K>	keySet()	Gets a view of the keys contained in this map.
K	lastKey()	Gets the last key currently in this map.
V	put(K key, V value)	Always throws UnsupportedOperationException.
void	putAll(Map<? extends K,? extends V> mapToCopy)	Always throws UnsupportedOperationException.
V	remove(Object key)	Always throws UnsupportedOperationException.
SortedMap<K,V>	subMap(K fromKey, K toKey)
SortedMap<K,V>	tailMap(K fromKey)
static <K, V> SortedMap<K,V>	unmodifiableSortedMap(SortedMap<K,? extends V> map)	Factory method to create an unmodifiable sorted map.
Collection<V>	values()	Gets a a collection view of the values contained in this map.

Methods inherited from class org.apache.commons.collections4.map.AbstractSortedMapDecorator

decorated, mapIterator, nextKey, previousKey

Methods inherited from class org.apache.commons.collections4.map.AbstractMapDecorator

containsKey, containsValue, equals, get, hashCode, isEmpty, size, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.collections4.Get

containsKey, containsValue, get, isEmpty, size

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, equals, forEach, get, getOrDefault, hashCode, isEmpty, merge, putIfAbsent, remove, replace, replace, replaceAll, size

Method Details

unmodifiableSortedMap

public static <K,
V> SortedMap<K,V> unmodifiableSortedMap(SortedMap<K,? extends V> map)

Factory method to create an unmodifiable sorted map.

Type Parameters:

K - the key type

V - the value type

Parameters:

map - The map to decorate, must not be null

Returns:

A new unmodifiable sorted map

Throws:

NullPointerException - if map is null

Since:

4.0

clear

public void clear()

Always throws UnsupportedOperationException.

Specified by:

clear in interface Map<K,V>

Specified by:

clear in interface Put<K,V>

Overrides:

clear in class AbstractMapDecorator<K,V>

Throws:

UnsupportedOperationException - Always thrown.

See Also:

• Map.clear()

comparator

public Comparator<? super K> comparator()

Specified by:

comparator in interface SortedMap<K,V>

Overrides:

comparator in class AbstractSortedMapDecorator<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Description copied from interface: Get

Gets a set view of the mappings contained in this map.

Specified by:

entrySet in interface Get<K,V>

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in interface SortedMap<K,V>

Overrides:

entrySet in class AbstractMapDecorator<K,V>

Returns:

A set view of the mappings contained in this map.

See Also:

• Map.entrySet()

firstKey

public K firstKey()

Description copied from interface: OrderedMap

Gets the first key currently in this map.

Specified by:

firstKey in interface OrderedMap<K,V>

Specified by:

firstKey in interface SortedMap<K,V>

Overrides:

firstKey in class AbstractSortedMapDecorator<K,V>

Returns:

The first key currently in this map.

headMap

public SortedMap<K,V> headMap(K toKey)

Specified by:

headMap in interface SortedMap<K,V>

Overrides:

headMap in class AbstractSortedMapDecorator<K,V>

keySet

public Set<K> keySet()

Description copied from interface: Get

Gets a view of the keys contained in this map.

Specified by:

keySet in interface Get<K,V>

Specified by:

keySet in interface Map<K,V>

Specified by:

keySet in interface SortedMap<K,V>

Overrides:

keySet in class AbstractMapDecorator<K,V>

Returns:

A set view of the keys contained in this map.

See Also:

• Map.keySet()

lastKey

public K lastKey()

Description copied from interface: OrderedMap

Gets the last key currently in this map.

Specified by:

lastKey in interface OrderedMap<K,V>

Specified by:

lastKey in interface SortedMap<K,V>

Overrides:

lastKey in class AbstractSortedMapDecorator<K,V>

Returns:

The last key currently in this map.

put

public V put(K key,
 V value)

Always throws UnsupportedOperationException.

Specified by:

put in interface Map<K,V>

Specified by:

put in interface Put<K,V>

Overrides:

put in class AbstractMapDecorator<K,V>

Parameters:

key - Ignored.

value - Ignored.

Returns:

The previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key, if the implementation supports null values.)

Throws:

UnsupportedOperationException - Always thrown.

See Also:

• Map.put(Object, Object)

putAll

public void putAll(Map<? extends K,? extends V> mapToCopy)

Always throws UnsupportedOperationException.

Specified by:

putAll in interface Map<K,V>

Specified by:

putAll in interface Put<K,V>

Overrides:

putAll in class AbstractMapDecorator<K,V>

Parameters:

mapToCopy - Ignored.

Throws:

UnsupportedOperationException - Always thrown.

See Also:

• Map.putAll(Map)

remove

public V remove(Object key)

Always throws UnsupportedOperationException.

Specified by:

remove in interface Get<K,V>

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMapDecorator<K,V>

Parameters:

key - Ignored.

Returns:

The previous value associated with key, or null if there was no mapping for key.

Throws:

UnsupportedOperationException - Always thrown.

See Also:

• Map.remove(Object)

subMap

public SortedMap<K,V> subMap(K fromKey,
 K toKey)

Specified by:

subMap in interface SortedMap<K,V>

Overrides:

subMap in class AbstractSortedMapDecorator<K,V>

tailMap

public SortedMap<K,V> tailMap(K fromKey)

Specified by:

tailMap in interface SortedMap<K,V>

Overrides:

tailMap in class AbstractSortedMapDecorator<K,V>

values

public Collection<V> values()

Description copied from interface: Get

Gets a a collection view of the values contained in this map.

Specified by:

values in interface Get<K,V>

Specified by:

values in interface Map<K,V>

Specified by:

values in interface SortedMap<K,V>

Overrides:

values in class AbstractMapDecorator<K,V>

Returns:

A collection view of the values contained in this map.

See Also:

• Map.values()