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.

- ## Nested Class Summary

  ## Nested classes/interfaces inherited from interface java.util.Map

  `Map.Entry<K extends Object,V extends Object>`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CacheMap()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `clear()`
  `boolean`
  `containsKey(Object key)`
  `boolean`
  `containsValue(Object value)`
  `Set<Map.Entry<K,V>>`
  `entrySet()`
  `V`
  `get(Object key)`
  `boolean`
  `isEmpty()`
  `Set<K>`
  `keySet()`
  `V`
  `put(K key, V value)`
  `void`
  `putAll(Map<? extends K,? extends V> t)`
  `V`
  `remove(Object key)`
  `int`
  `size()`
  `String`
  `toString()`
  `Collection<V>`
  `values()`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

  ### Methods inherited from interface java.util.Map

  `compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll`

- ## 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`