Package org.onemind.commons.java.datastructure

Class TrackedMap

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable, java.util.Map
    public class TrackedMap
extends java.util.HashMap
    A map that has it's map values changes tracked. It uses an inner map to keep the unchanged value and itself to track the changes
    Version:
    $Id: TrackedMap.java,v 1.2 2004/08/26 12:33:16 thlee Exp $ $Name: $
    Author:
    TiongHiang Lee (thlee@onemindsoft.org)
    See Also:
    Serialized Form

    • Nested Class Summary

      • Nested classes/interfaces inherited from class java.util.AbstractMap

        java.util.AbstractMap.SimpleEntry<K extends java.lang.Object,​V extends java.lang.Object>, java.util.AbstractMap.SimpleImmutableEntry<K extends java.lang.Object,​V extends java.lang.Object>

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

        java.util.Map.Entry<K extends java.lang.Object,​V extends java.lang.Object>

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.util.Map _tracked
      the track inner map *

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void clear()
      void clearChanges()
      Clear all the changes
      boolean containsKey​(java.lang.Object key)
      boolean containsValue​(java.lang.Object value)
      java.util.Set entrySet()
      java.lang.Object get​(java.lang.Object key)
      java.util.Set getChangedKeySet()
      Return the key set of changed values
      boolean hasChanges()
      Return whether this map has been changes
      boolean isEmpty()
      java.util.Set keySet()
      void makeUpToDate()
      Make this map as up-to-date.
      java.lang.Object remove​(java.lang.Object key)
      int size()
      java.util.Collection values()

      • Methods inherited from class java.util.HashMap

        clone, compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, put, putAll, putIfAbsent, remove, replace, replace, replaceAll

      • 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

    • Field Detail

      • _tracked

        private java.util.Map _tracked
        the track inner map *

    • Constructor Detail

      • TrackedMap

        public TrackedMap()

      • TrackedMap

        public TrackedMap​(int initialCapacity)

      • TrackedMap

        public TrackedMap​(int initialCapacity,
                  float loadFactor)

      • TrackedMap

        public TrackedMap​(java.util.Map map)

    • Method Detail

      • hasChanges

        public boolean hasChanges()
        Return whether this map has been changes
        Returns:
        true if it has been changed

      • getChangedKeySet

        public java.util.Set getChangedKeySet()
        Return the key set of changed values
        Returns:
        the key set

      • get

        public java.lang.Object get​(java.lang.Object key)
        Specified by:
        get in interface java.util.Map
        Overrides:
        get in class java.util.HashMap

      • makeUpToDate

        public void makeUpToDate()
        Make this map as up-to-date.

      • clearChanges

        public void clearChanges()
        Clear all the changes

      • clear

        public void clear()
        Specified by:
        clear in interface java.util.Map
        Overrides:
        clear in class java.util.HashMap

      • containsKey

        public boolean containsKey​(java.lang.Object key)
        Specified by:
        containsKey in interface java.util.Map
        Overrides:
        containsKey in class java.util.HashMap

      • containsValue

        public boolean containsValue​(java.lang.Object value)
        Specified by:
        containsValue in interface java.util.Map
        Overrides:
        containsValue in class java.util.HashMap

      • entrySet

        public java.util.Set entrySet()
        Specified by:
        entrySet in interface java.util.Map
        Overrides:
        entrySet in class java.util.HashMap

      • isEmpty

        public boolean isEmpty()
        Specified by:
        isEmpty in interface java.util.Map
        Overrides:
        isEmpty in class java.util.HashMap

      • keySet

        public java.util.Set keySet()
        Specified by:
        keySet in interface java.util.Map
        Overrides:
        keySet in class java.util.HashMap

      • remove

        public java.lang.Object remove​(java.lang.Object key)
        Specified by:
        remove in interface java.util.Map
        Overrides:
        remove in class java.util.HashMap

      • size

        public int size()
        Specified by:
        size in interface java.util.Map
        Overrides:
        size in class java.util.HashMap

      • values

        public java.util.Collection values()
        Specified by:
        values in interface java.util.Map
        Overrides:
        values in class java.util.HashMap