org.biojava.utils.cache
Class WeakValueHashMap
java.lang.Object
java.util.AbstractMap
org.biojava.utils.cache.WeakValueHashMap
- All Implemented Interfaces:
- Map
public class WeakValueHashMap
- extends AbstractMap
Map implementation which keeps weak references to values.
Entries are removed from the map when their value is
no longer reachable using normal (hard) references. This is
useful for maintaining canonical copies of objects without forcing
these objects to remain in memory forever.
Note that this is distinct from the standard library class,
WeakHashMap
which has weak keys.
- Since:
- 1.3
- Author:
- Thomas Down
Nested classes/interfaces inherited from interface java.util.Map |
Map.Entry |
Methods inherited from class java.util.AbstractMap |
clear, clone, containsValue, equals, hashCode, isEmpty, keySet, putAll, remove, size, toString, values |
WeakValueHashMap
public WeakValueHashMap()
put
public Object put(Object key,
Object value)
- Specified by:
put
in interface Map
- Overrides:
put
in class AbstractMap
get
public Object get(Object key)
- Specified by:
get
in interface Map
- Overrides:
get
in class AbstractMap
containsKey
public boolean containsKey(Object o)
- Specified by:
containsKey
in interface Map
- Overrides:
containsKey
in class AbstractMap
entrySet
public Set entrySet()
- Specified by:
entrySet
in interface Map
- Specified by:
entrySet
in class AbstractMap