Package org.apache.cxf.common.util

Class CacheMap<K,V>

java.lang.Object
org.apache.cxf.common.util.CacheMap<K,V>
All Implemented Interfaces:
Map<K,V>
public class CacheMap<K,V> extends Object implements Map<K,V>
Implements a useful caching map. It weakly references the keys, but strongly references the data. It works much like the WeakHashMap, in that when the keys are garbage collected, the data is removed from the map. The main difference is that keys used for lookups don't have to be "==" the same to maintain the data in the cache. Basically, lookups in this map use a ".equals" compare, but the keys are then stored with a "==" compare so if the original key is garbage collected, the other keys that may reference the data keep the data in the cache. Note that this implementation is not synchronized. Not even a little. 'Read-only' operations can trigger internal modifications. If you share this class between threads, you must protect every operation.

  • Constructor Details

    • CacheMap

      public CacheMap()

  • Method Details

    • 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>

    • entrySet

      public Set<Map.Entry<K,V>> entrySet()
      Specified by:
      entrySet in interface Map<K,V>

    • get

      public V get(Object key)
      Specified by:
      get in interface Map<K,V>

    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface Map<K,V>

    • keySet

      public Set<K> keySet()
      Specified by:
      keySet 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> t)
      Specified by:
      putAll in interface Map<K,V>

    • remove

      public V remove(Object key)
      Specified by:
      remove in interface Map<K,V>

    • size

      public int size()
      Specified by:
      size in interface Map<K,V>

    • values

      public Collection<V> values()
      Specified by:
      values in interface Map<K,V>

    • toString

      public String toString()
      Overrides:
      toString in class Object