org.h2.util
Class SoftHashMap<K,V>
java.lang.Object
java.util.AbstractMap<K,V>
org.h2.util.SoftHashMap<K,V>
- Type Parameters:
K
- the key typeV
- the value type
- All Implemented Interfaces:
- java.util.Map<K,V>
public class SoftHashMap<K,V>
- extends java.util.AbstractMap<K,V>
Map which stores items using SoftReference. Items can be garbage collected
and removed. It is not a general purpose cache, as it doesn't implement some
methods, and others not according to the map definition, to improve speed.
Nested classes/interfaces inherited from class java.util.AbstractMap |
java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V> |
Nested classes/interfaces inherited from interface java.util.Map |
java.util.Map.Entry<K,V> |
Method Summary |
void |
clear()
|
java.util.Set<java.util.Map.Entry<K,V>> |
entrySet()
|
V |
get(java.lang.Object key)
|
V |
put(K key,
V value)
Store the object. |
V |
remove(java.lang.Object key)
Remove an object. |
Methods inherited from class java.util.AbstractMap |
clone, containsKey, containsValue, equals, hashCode, isEmpty, keySet, putAll, size, toString, values |
Methods inherited from class java.lang.Object |
finalize, getClass, notify, notifyAll, wait, wait, wait |
SoftHashMap
public SoftHashMap()
get
public V get(java.lang.Object key)
- Specified by:
get
in interface java.util.Map<K,V>
- Overrides:
get
in class java.util.AbstractMap<K,V>
put
public V put(K key,
V value)
- Store the object. The return value of this method is null or a SoftReference.
- Specified by:
put
in interface java.util.Map<K,V>
- Overrides:
put
in class java.util.AbstractMap<K,V>
- Parameters:
key
- the keyvalue
- the value
- Returns:
- null or the old object.
remove
public V remove(java.lang.Object key)
- Remove an object.
- Specified by:
remove
in interface java.util.Map<K,V>
- Overrides:
remove
in class java.util.AbstractMap<K,V>
- Parameters:
key
- the key
- Returns:
- null or the old object
clear
public void clear()
- Specified by:
clear
in interface java.util.Map<K,V>
- Overrides:
clear
in class java.util.AbstractMap<K,V>
entrySet
public java.util.Set<java.util.Map.Entry<K,V>> entrySet()
- Specified by:
entrySet
in interface java.util.Map<K,V>
- Specified by:
entrySet
in class java.util.AbstractMap<K,V>