Package org.apache.commons.collections4.map

Interface CompositeMap.MapMutator<K,V>

Type Parameters:

K - the type of the keys in the map

V - the type of the values in the map

All Superinterfaces:

Serializable

Enclosing class:

CompositeMap<K,V>

public static interface CompositeMap.MapMutator<K,V>
extends Serializable

This interface allows definition for all of the indeterminate mutators in a CompositeMap, as well as providing a hook for callbacks on key collisions.

Method Summary

Modifier and Type	Method	Description
V	put(CompositeMap<K,V> map, Map<K,V>[] composited, K key, V value)	Called when the CompositeMap.put() method is invoked.
void	putAll(CompositeMap<K,V> map, Map<K,V>[] composited, Map<? extends K,? extends V> mapToAdd)	Called when the CompositeMap.putAll() method is invoked.
void	resolveCollision(CompositeMap<K,V> composite, Map<K,V> existing, Map<K,V> added, Collection<K> intersect)	Called when adding a new Composited Map results in a key collision.

Method Detail

resolveCollision

void resolveCollision(CompositeMap<K,V> composite,
                      Map<K,V> existing,
                      Map<K,V> added,
                      Collection<K> intersect)

Called when adding a new Composited Map results in a key collision.

Parameters:

composite - the CompositeMap with the collision

existing - the Map already in the composite which contains the offending key

added - the Map being added

intersect - the intersection of the keysets of the existing and added maps

put

V put(CompositeMap<K,V> map,
      Map<K,V>[] composited,
      K key,
      V value)

Called when the CompositeMap.put() method is invoked.

Parameters:

map - the CompositeMap which is being modified

composited - array of Maps in the CompositeMap being modified

key - key with which the specified value is to be associated.

value - value to be associated with the specified key.

Returns:

previous value associated with specified key, or null if there was no mapping for key. A null return can also indicate that the map previously associated null with the specified key, if the implementation supports null values.

Throws:

UnsupportedOperationException - if not defined

ClassCastException - if the class of the specified key or value prevents it from being stored in this map.

IllegalArgumentException - if some aspect of this key or value prevents it from being stored in this map.

NullPointerException - this map does not permit null keys or values, and the specified key or value is null.

putAll

void putAll(CompositeMap<K,V> map,
            Map<K,V>[] composited,
            Map<? extends K,? extends V> mapToAdd)

Called when the CompositeMap.putAll() method is invoked.

Parameters:

map - the CompositeMap which is being modified

composited - array of Maps in the CompositeMap being modified

mapToAdd - Mappings to be stored in this CompositeMap

Throws:

UnsupportedOperationException - if not defined

ClassCastException - if the class of the specified key or value prevents it from being stored in this map.

IllegalArgumentException - if some aspect of this key or value prevents it from being stored in this map.

NullPointerException - this map does not permit null keys or values, and the specified key or value is null.