com.google.common.collect
Class ForwardingMap<K,V>
java.lang.Object
com.google.common.collect.ForwardingObject
com.google.common.collect.ForwardingMap<K,V>
- All Implemented Interfaces:
- Serializable, Map<K,V>
- Direct Known Subclasses:
- EnumBiMap, EnumHashBiMap, ForwardingConcurrentMap, ForwardingSortedMap, HashBiMap
public abstract class ForwardingMap<K,V>
- extends ForwardingObject
- implements Map<K,V>
A map which forwards all its method calls to another map. Subclasses should
override one or more methods to modify the behavior of the backing map as
desired per the decorator pattern.
- Author:
- Kevin Bourrillion
- See Also:
ForwardingObject
,
Serialized Form
Nested classes/interfaces inherited from interface java.util.Map |
Map.Entry<K,V> |
Constructor Summary |
protected |
ForwardingMap(Map<K,V> delegate)
Constructs a forwarding map that forwards to the provided delegate. |
ForwardingMap
protected ForwardingMap(Map<K,V> delegate)
- Constructs a forwarding map that forwards to the provided delegate.
delegate
protected Map<K,V> delegate()
- Description copied from class:
ForwardingObject
- Returns the backing delegate object. This method should be overridden to
specify the correct return type. For example:
@SuppressWarnings("unchecked")
@Override protected Foo delegate() {
return (Foo) super.delegate();
}
This method should always return the same delegate instance that was passed
to the constructor.
- Overrides:
delegate
in class ForwardingObject
size
public int size()
- Specified by:
size
in interface Map<K,V>
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interface Map<K,V>
remove
public V remove(Object object)
- Specified by:
remove
in interface Map<K,V>
clear
public void clear()
- Specified by:
clear
in interface Map<K,V>
containsKey
public boolean containsKey(Object key)
- Specified by:
containsKey
in interface Map<K,V>
containsValue
public boolean containsValue(Object value)
- Specified by:
containsValue
in interface Map<K,V>
get
public V get(Object key)
- Specified by:
get
in interface Map<K,V>
put
public V put(K key,
V value)
- Specified by:
put
in interface Map<K,V>
putAll
public void putAll(Map<? extends K,? extends V> map)
- Specified by:
putAll
in interface Map<K,V>
keySet
public Set<K> keySet()
- Specified by:
keySet
in interface Map<K,V>
values
public Collection<V> values()
- Specified by:
values
in interface Map<K,V>
entrySet
public Set<Map.Entry<K,V>> entrySet()
- Specified by:
entrySet
in interface Map<K,V>
equals
public boolean equals(Object obj)
- Specified by:
equals
in interface Map<K,V>
- Overrides:
equals
in class Object
hashCode
public int hashCode()
- Specified by:
hashCode
in interface Map<K,V>
- Overrides:
hashCode
in class Object