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## org.apache.openjpa.util
Class MapChangeTrackerImpl

    java.lang.Object
      org.apache.openjpa.util.AbstractChangeTracker
          org.apache.openjpa.util.MapChangeTrackerImpl

All Implemented Interfaces:
  ChangeTracker, MapChangeTracker

    public class MapChangeTrackerImpl

extends AbstractChangeTracker
implements MapChangeTracker

Default `MapChangeTracker`.

Author:
  Abe White

Field Summary

Fields inherited from class org.apache.openjpa.util.AbstractChangeTracker
`add, change, rem`

Constructor Summary
`MapChangeTrackerImpl(Map map, boolean autoOff)` Constructor; supply delegate map.

Method Summary
`protected void` | `add(Object obj)` Mark the given value as added.
`void` | `added(Object key, Object val)` Record that the given entry was added to the map.
`protected void` | `change(Object key)` Mark the given value as changed.
`void` | `changed(Object key, Object oldVal, Object newVal)` Record that the given entry was altered.
`boolean` | `getTrackKeys()` Whether to track keys or values.
`protected void` | `remove(Object obj)` Mark the given value as removed.
`void` | `removed(Object key, Object val)` Record that the given entry was removed from the map.
`void` | `setTrackKeys(boolean keys)` Whether to track keys or values.

Methods inherited from class org.apache.openjpa.util.AbstractChangeTracker
`added, changed, getAdded, getAutoOff, getChanged, getNextSequence, getRemoved, initialSequence, isTracking, newSet, removed, reset, setAutoOff, setNextSequence, startTracking, stopTracking`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.apache.openjpa.util.ChangeTracker
`getAdded, getChanged, getNextSequence, getRemoved, isTracking, setNextSequence, startTracking, stopTracking`

Constructor Detail

### MapChangeTrackerImpl

    public MapChangeTrackerImpl(Map map,
                                boolean autoOff)

  Constructor; supply delegate map.

Method Detail

### getTrackKeys

    public boolean getTrackKeys()

  Description copied from interface: `MapChangeTracker`
  Whether to track keys or values. Defaults to keys. If you set to values, it is assumed there is a 1-1 correlation between keys and values in this map.

  Specified by:
    `getTrackKeys` in interface `MapChangeTracker`

### setTrackKeys

    public void setTrackKeys(boolean keys)

  Description copied from interface: `MapChangeTracker`
  Whether to track keys or values. Defaults to keys. If you set to values, it is assumed there is a 1-1 correlation between keys and values in this map.

  Specified by:
    `setTrackKeys` in interface `MapChangeTracker`

### added

    public void added(Object key,
                      Object val)

  Description copied from interface: `MapChangeTracker`
  Record that the given entry was added to the map.

  Specified by:
    `added` in interface `MapChangeTracker`

### removed

    public void removed(Object key,
                        Object val)

  Description copied from interface: `MapChangeTracker`
  Record that the given entry was removed from the map.

  Specified by:
    `removed` in interface `MapChangeTracker`

### changed

    public void changed(Object key,
                        Object oldVal,
                        Object newVal)

  Description copied from interface: `MapChangeTracker`
  Record that the given entry was altered.

  Specified by:
    `changed` in interface `MapChangeTracker`

### add

    protected void add(Object obj)

  Description copied from class: `AbstractChangeTracker`
  Mark the given value as added.

  Specified by:
    `add` in class `AbstractChangeTracker`

### remove

    protected void remove(Object obj)

  Description copied from class: `AbstractChangeTracker`
  Mark the given value as removed.

  Specified by:
    `remove` in class `AbstractChangeTracker`

### change

    protected void change(Object key)

  Description copied from class: `AbstractChangeTracker`
  Mark the given value as changed.

  Specified by:
    `change` in class `AbstractChangeTracker`

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