MapChangeTracker (OpenJPA Parent POM 4.0.0 API)

All Superinterfaces:

ChangeTracker

All Known Implementing Classes:

AbstractLRSProxyMap, MapChangeTrackerImpl
```
public interface MapChangeTracker
extends ChangeTracker
```
Change tracker that can be used for maps. If the user calls any mutating methods on the map that do not have an equivalent in this change tracker, then you must call ChangeTracker.stopTracking() after applying the operation to the map. The collections returned from ChangeTracker.getAdded() and ChangeTracker.getRemoved() will be collections of keys to add/remove.

Author:

Abe White

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`added(java.lang.Object key, java.lang.Object val)`	Record that the given entry was added to the map.
`void`	`changed(java.lang.Object key, java.lang.Object oldVal, java.lang.Object newVal)`	Record that the given entry was altered.
`boolean`	`getTrackKeys()`	Whether to track keys or values.
`void`	`removed(java.lang.Object key, java.lang.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 interface org.apache.openjpa.util.ChangeTracker
getAdded, getChanged, getNextSequence, getRemoved, isTracking, setNextSequence, startTracking, stopTracking

- Method Detail
  - getTrackKeys
```
boolean getTrackKeys()
```
    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.
  - setTrackKeys
```
void setTrackKeys(boolean keys)
```
    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.
  - added
```
void added(java.lang.Object key,
           java.lang.Object val)
```
    Record that the given entry was added to the map.
  - removed
```
void removed(java.lang.Object key,
             java.lang.Object val)
```
    Record that the given entry was removed from the map.
  - changed
```
void changed(java.lang.Object key,
             java.lang.Object oldVal,
             java.lang.Object newVal)
```
    Record that the given entry was altered.