Package org.apache.commons.collections.map

Interface CompositeMap.MapMutator

  • Enclosing class:
    CompositeMap
    public static interface CompositeMap.MapMutator
    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 Detail

      • resolveCollision

        void resolveCollision​(CompositeMap composite,
                      Map existing,
                      Map added,
                      Collection 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

        Object put​(CompositeMap map,
           Map[] composited,
           Object key,
           Object 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 map,
            Map[] composited,
            Map 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.