Thanks for the feature request @DavidWylie. I think that this one is similar to #1075 and #717. I think we had one other feature request that was requesting to provide the index of a list.

I think that it is an interesting feature for MapStruct. If you are up for it you can try contributing it 😄. We are here of course for guidance and help.

@DavidWylie, your source listing seems to miss some characters, so just to double check: you mean to have a Map of some kind as the source parameter in these examples?

I would like this feature too and as such I am willing to donate some time to do implement it. Any objections or can I get stuck straight in?

@filiphr .. I think this is is interesting.. @slukes .. What did you have in mind?

I also think that this is interesting. I am only not sure about which approach is good to take. In any case @slukes I think that you can work on this if you want to. However, before starting I would suggest that you outline how the API would look like.

If you ask me doing something like:

@Mapping(target = "target", source = "map[id]")

might be the way to go. The only thing is do we do this only for Map<String, T> or do we allow to do something else as well. Not sure if something else apart from a map would make sense.

What did you have in mind @slukes?

@filiphr: Do you have some special cases in mind where it make sense to write map[id] instead of just map.id like we are always doing it? Hum... while writing this it comes into a mind that a key could have whitespaces.
map[foo bar] looks probably better than map.foo bar ... but I don't find any other reasons to prevent using whitespaces in the dot-notation then this one.

As just proposed in #1731 we may find a general way with a consistent approach for different, but similar, kind of mappings.

The main use case I had in mind was actually mapping from a bean to a Map<String, Object> in essence to have the same effect as BeanUtils.describe(). I don't think this would require any special syntax as such? (I think I incorrectly jumped on this issue as being the same as what I wanted).

It makes sense to implement the case @filiphr raises at the same time though. Regarding the syntax for that - In a map key you can literally any character in the key including ., [, ] what would we expect to happen here? Should there be some kind of escape sequence to allow for this in either case?

Sorry, I want to ask, where does this feature go now? When can they be merged?

Does mapstruct supports HashMap with value as List of objects ? as shown below ,

private Map<String, List> issues = null;

with version as --> 1.3.0.Final

I'm working on a pr for this. Not much progress last 2 months

I would love to see this in action. But I see it is still open, have we reached anywhere near to the proposed solution?

I've changed the title of this to reflect the functionality for mapping a Map from a Field. Since the functionality for mapping from a Map into a Field is part of 1.5.0.Beta1 done as part of #1075.

I would love to see this in action. any progress on this feature?