What is Data Mapping
A mapper can be used to map the result of a source to an OpenNMS Requisition model.
The mapper receives the result of the source.
The source is not limited in the data model it provides to the mapper.
The mapper has to provide an OpenNMS Requisition as its result.
If the source provides a custom data model, the mapper has to map it into a Requisition.
Some sources provide OpenNMS Requisition directly in a ready-to-use form; in those cases the
echo.mapper can be used.
Complex sources like the
OCS-Sources provide OCS specific models and require their own specific mappers.
A mapper is configured in the
requisition.properties for the requisition.
echo mapper is a mapper that forwards the result of the source verbatim.
That requires the source to provide a ready-to-use requisition and not a custom model.
This mapper does not change the result of the source.