org.apache.commons.collections
Class ProxyMap
java.lang.Object
|
+--org.apache.commons.collections.ProxyMap
- All Implemented Interfaces:
- Map
- public abstract class ProxyMap
- extends Object
- implements Map
This Map
wraps another Map
implementation, using the wrapped instance for its default
implementation. This class is used as a framework on which to
build to extensions for its wrapped Map
object which
would be unavailable or inconvenient via sub-classing (but usable
via composition).
An example use case is where the wrapped Map
needs
synchronization (to make it thread-safe), but the Map
returned by Collections.synchronizedMap(map)
hides part of map
's public interface.
- Since:
- 2.0
- Author:
- Daniel Rall
Field Summary |
protected Map |
map
The Map used for default implementations. |
Constructor Summary |
ProxyMap(Map map)
Creates a new instance acting as a representative for the
specified Map . |
map
protected Map map
- The
Map
used for default implementations.
ProxyMap
public ProxyMap(Map map)
- Creates a new instance acting as a representative for the
specified
Map
.
- Parameters:
map
- The Map
to whose operations to wrap.
clear
public void clear()
- Specified by:
clear
in interface Map
containsKey
public boolean containsKey(Object key)
- Specified by:
containsKey
in interface Map
containsValue
public boolean containsValue(Object value)
- Specified by:
containsValue
in interface Map
entrySet
public Set entrySet()
- Specified by:
entrySet
in interface Map
equals
public boolean equals(Object map)
- Specified by:
equals
in interface Map
- Overrides:
equals
in class Object
get
public Object get(Object key)
- Specified by:
get
in interface Map
hashCode
public int hashCode()
- Specified by:
hashCode
in interface Map
- Overrides:
hashCode
in class Object
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interface Map
keySet
public Set keySet()
- Specified by:
keySet
in interface Map
put
public Object put(Object key,
Object value)
- Specified by:
put
in interface Map
putAll
public void putAll(Map t)
- Specified by:
putAll
in interface Map
remove
public Object remove(Object key)
- Specified by:
remove
in interface Map
size
public int size()
- Specified by:
size
in interface Map
values
public Collection values()
- Specified by:
values
in interface Map
Copyright © 2001 Apache Software Foundation. Documenation generated April 2 2002.