net.sergeych.diff

Class MapDelta<T,V,U>

java.lang.Object

net.sergeych.diff.Delta

net.sergeych.diff.MapDelta<T,V,U>

Type Parameters:

T - key type

V - first map value type

U - second map value type

public class MapDelta<T,V,U>
extends Delta

Map difference calculation.

Method Summary

Modifier and Type	Method and Description
static MapDelta	compare(Delta parent, java.util.Map oldMap, java.util.Map newMap)
static MapDelta	compare(java.util.Map oldMap, java.util.Map newMap) Compare two maps with same key types.
Delta	getChange(T key) Get the difference for a given key
java.util.Map<T,Delta>	getChanges() Get all changes as a map where key is a key of the different items and a value is are Delta instances describing the changes.
boolean	isEmpty()
void	remove(T field)

Methods inherited from class net.sergeych.diff.Delta

between, getNestedDelta, getParent, newValue, oldValue, registerInParent

Methods inherited from class java.lang.Object

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

Method Detail

getChanges

public java.util.Map<T,Delta> getChanges()

Get all changes as a map where key is a key of the different items and a value is are Delta instances describing the changes.

Returns:

map of changes.

compare

public static MapDelta compare(Delta parent,
                               java.util.Map oldMap,
                               java.util.Map newMap)

compare

public static MapDelta compare(java.util.Map oldMap,
                               java.util.Map newMap)

Compare two maps with same key types. Detected are: new items, deleted and changed items. See Delta for more.

Parameters:

oldMap -

newMap -

Returns:

Delta showin the difference between maps or null if they are equal.

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in class Delta

Returns:

true if the difference is not found. This is internal function to be implemented by subclasses.

getChange

public Delta getChange(T key)

Get the difference for a given key

Parameters:

key -

Returns:

the difference or null if the items apper to be equal

remove

public void remove(T field)