Package org.apache.commons.collections4.map

Class UnmodifiableOrderedMap<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.AbstractOrderedMapDecorator<K,V>

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

All Implemented Interfaces:

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

public final class UnmodifiableOrderedMap<K,V>
extends AbstractOrderedMapDecorator<K,V>
implements Unmodifiable, Serializable

Decorates another OrderedMap 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

Version:

$Id: UnmodifiableOrderedMap.java 1686855 2015-06-22 13:00:27Z tn $

See Also:

• Serialized Form

Nested Class Summary

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

Map.Entry<K extends Object,V extends Object>

Method Summary

Modifier and Type	Method	Description
void	clear()
Set<Map.Entry<K,V>>	entrySet()
Set<K>	keySet()
OrderedMapIterator<K,V>	mapIterator()	Obtains a MapIterator over the map.
V	put(K key, V value)	Note that the return type is Object, rather than V as in the Map interface.
void	putAll(Map<? extends K,? extends V> mapToCopy)
V	remove(Object key)
static <K, V> OrderedMap<K,V>	unmodifiableOrderedMap(OrderedMap<? extends K,? extends V> map)	Factory method to create an unmodifiable sorted map.
Collection<V>	values()

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

decorated, firstKey, lastKey, 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

unmodifiableOrderedMap

public static <K,
V> OrderedMap<K,V> unmodifiableOrderedMap(OrderedMap<? extends 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 ordered map

Throws:

NullPointerException - if map is null

Since:

4.0

mapIterator

public OrderedMapIterator<K,V> mapIterator()

Description copied from class: AbstractIterableMap

Obtains a MapIterator over the map.

A map iterator is an efficient way of iterating over maps. There is no need to access the entry set or use Map Entry objects.

 IterableMap<String,Integer> map = new HashedMap<String,Integer>();
 MapIterator<String,Integer> it = map.mapIterator();
 while (it.hasNext()) {
   String key = it.next();
   Integer value = it.getValue();
   it.setValue(value + 1);
 }
 

Specified by:

mapIterator in interface IterableGet<K,V>

Specified by:

mapIterator in interface OrderedMap<K,V>

Overrides:

mapIterator in class AbstractOrderedMapDecorator<K,V>

Returns:

a map iterator

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Specified by:

clear in interface Put<K,V>

Overrides:

clear in class AbstractMapDecorator<K,V>

See Also:

• Map.clear()

put

public V put(K key,
 V value)

Description copied from interface: Put

Note that the return type is Object, rather than V as in the Map interface. See the class Javadoc for further info.

Specified by:

put in interface Map<K,V>

Specified by:

put in interface Put<K,V>

Overrides:

put in class AbstractMapDecorator<K,V>

See Also:

• Map.put(Object, Object)

putAll

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

Specified by:

putAll in interface Map<K,V>

Specified by:

putAll in interface Put<K,V>

Overrides:

putAll in class AbstractMapDecorator<K,V>

See Also:

• Map.putAll(Map)

remove

public V remove(Object key)

Specified by:

remove in interface Get<K,V>

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMapDecorator<K,V>

See Also:

• Map.remove(Object)

entrySet

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

Specified by:

entrySet in interface Get<K,V>

Specified by:

entrySet in interface Map<K,V>

Overrides:

entrySet in class AbstractMapDecorator<K,V>

See Also:

• Map.entrySet()

keySet

public Set<K> keySet()

Specified by:

keySet in interface Get<K,V>

Specified by:

keySet in interface Map<K,V>

Overrides:

keySet in class AbstractMapDecorator<K,V>

See Also:

• Map.keySet()

values

public Collection<V> values()

Specified by:

values in interface Get<K,V>

Specified by:

values in interface Map<K,V>

Overrides:

values in class AbstractMapDecorator<K,V>

See Also:

• Map.values()