Package com.cedarsoftware.util

Class TrackingMap<K,V>

java.lang.Object
com.cedarsoftware.util.TrackingMap<K,V>
All Implemented Interfaces:
Map<K,V>
public class TrackingMap<K,V> extends Object implements Map<K,V>
TrackingMap
Author:
Sean Kellner
Copyright (c) Cedar Software LLC

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

  • Constructor Details

    • TrackingMap

      public TrackingMap(Map<K,V> map)
      Wrap the passed in Map with a TrackingMap.
      Parameters:
      map - Map to wrap

  • Method Details

    • get

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

    • put

      public V put(K key, V value)
      Specified by:
      put in interface Map<K,V>

    • containsKey

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

    • putAll

      public void putAll(Map<? extends K,? extends V> m)
      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>

    • isEmpty

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

    • equals

      public boolean equals(Object other)
      Specified by:
      equals in interface Map<K,V>
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface Map<K,V>
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • clear

      public void clear()
      Specified by:
      clear in interface Map<K,V>

    • containsValue

      public boolean containsValue(Object value)
      Specified by:
      containsValue in interface Map<K,V>

    • values

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

    • keySet

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

    • entrySet

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

    • expungeUnused

      public void expungeUnused()
      Remove the entries from the Map that have not been accessed by .get() or .containsKey().

    • informAdditionalUsage

      public void informAdditionalUsage(Collection<K> additional)
      Add the Collection of keys to the internal list of keys accessed. If there are keys in the passed in Map that are not included in the contained Map, the readKeys will exceed the keySet() of the wrapped Map.
      Parameters:
      additional - Collection of keys to add to the list of keys read.

    • informAdditionalUsage

      public void informAdditionalUsage(TrackingMap<K,V> additional)
      Add the used keys from the passed in TrackingMap to this TrackingMap's keysUsed. This can cause the readKeys to include entries that are not in wrapped Maps keys.
      Parameters:
      additional - TrackingMap whose used keys are to be added to this maps used keys.

    • keysUsed

      public Set<K> keysUsed()
      Fetch the Set of keys that have been accessed via .get() or .containsKey() of the contained Map.
      Returns:
      Set of the accessed (read) keys.

    • getWrappedMap

      public Map<K,V> getWrappedMap()
      Fetch the Map that this TrackingMap wraps.
      Returns:
      Map the wrapped Map