com.jniwrapper.util
Class SoftCache
java.lang.Object
java.util.AbstractMap<K,V>
java.util.HashMap
com.jniwrapper.util.SoftCache
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, java.util.Map
public class SoftCache
- extends java.util.HashMap
SoftCache is a Map
that provides caching and retrieving of objects
via SoftReference
. Entries put in the cache are cleared when the
value objects become unreachable.
- See Also:
- Serialized Form
Nested classes/interfaces inherited from class java.util.AbstractMap |
java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V> |
Method Summary |
java.lang.Object |
get(java.lang.Object key)
Looks for the key in the cache. |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value)
Associates the passed key with the value via SoftReference . |
Methods inherited from class java.util.HashMap |
clear, clone, containsKey, containsValue, entrySet, isEmpty, keySet, putAll, remove, size, values |
Methods inherited from class java.util.AbstractMap |
equals, hashCode, toString |
Methods inherited from class java.lang.Object |
finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Map |
equals, hashCode |
SoftCache
public SoftCache(int initialCapacity)
SoftCache
public SoftCache()
put
public java.lang.Object put(java.lang.Object key,
java.lang.Object value)
- Associates the passed key with the value via
SoftReference
.
- Specified by:
put
in interface java.util.Map
- Overrides:
put
in class java.util.HashMap
- Parameters:
key
- a key with which the specified value is to be associated.value
- a value to be associated with the key.
- Returns:
- previously associated value or
null
if there was no
value associated, or if it became unreachable. A null
value
can also be returned, if it was previously associated with the key.
get
public java.lang.Object get(java.lang.Object key)
- Looks for the key in the cache.
- Specified by:
get
in interface java.util.Map
- Overrides:
get
in class java.util.HashMap
- Parameters:
key
- a key for which the value should be returned.
- Returns:
- a cached object or
null
if the entry for the passed
key is missing, or if the value become unreachable, or if the
null
value was associated with the key.