Adds to the specified element map all mappings contained in another element map.
Note: If an element mapping already exists in the destination element map, it is not changed.
Parameter:
elementMapId
sourceMapId
elementsQuery
If this subquery is specified, it is executed against each element from the source map (accessible in the subquery as the context element; see 'contextElement' property). Only those elements returned by the subquery will be put in the destination map (by the same key as the original element).
The object returned by the elementsQuery
subquery may be one of the following:
Enumeration
of elementsnull
value will be treated as no elements.
That is, nothing will be put in the destination map in place of the original element.
getMappedElements(), countMappedElements(), getElementMapKeys()