Mapping annotations for multiple source parameters

[Darren Reimer]

I can see by section 3.3 of the documentation (Mapping methods with several source parameters) that you can map multiple source parameters to a single target, but I don't understand what mapping annotation you would use to specify this.  For the example method:

DeliveryAddressDto personAndAddressToDeliveryAddressDto(Person person, Address address);

...what mapping annotation would you use to result in the above method being called?  I would expect you would need something like the following (but this is not correct):

@Mapping(source = "{person,address}", target = "deliveryAddress")

[Andreas Gudian]

Hi Darren,

that's not possible, yet. But it'll come eventually. We have an issue in GitHub that roughly describes the same thing that you propose: https://github.com/mapstruct/mapstruct/issues/621

In the mean time, you can use something like this for the assignment of deliveryAddress:

@Mapping(target = "deliveryAddress", expression = "java( personAndAddressToDeliveryAddr( source.getPerson(), source.getAddress() )")

Hope that helps,

Andreas

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[Darren Reimer]

Okay thanks, Andreas.

I see how you could use an expression for this, but I ended up dealing with this in an @AfterMapping method on my top level object mapping for other reasons.

Thanks for your reply.