Support for Map<String, String> in `JavaPropsMapper`

[filiphr]

Currently the JavaPropsMapper can only work with java.util.Properties. It would be good if there is support for using Map<String, String> in addition to java.util.Properties.

Would you be open in accepting a PR that adds this support?

[cowtowncoder]

I am not sure I understand: Maps are supported as values same as with any ObjectMapper.
JavaPropsMapper only adds couple of convenience methods for specific case of Properties.

[filiphr]

What I meant is that if you have:

Properties properties = new Properties();
properties.put("test.key", "Value");

JsonNode jsonNode = new JavaPropsMapper().readPropertiesAs(properties, JsonNode.class);
System.out.println(jsonNode);

you will get

{
  "test": {
    "key": "Value"
  }
}

However, for Map<String, String> you can't. I tried using convertValue but that would lead to

{
  "test.key": "Value"
}

Maybe I should have been more specific. I would like to convert Map<String, String> into JsonNode. And it seems that this is not possible (or at least I don't know how to do it).

[cowtowncoder]

Ah. I think I understand -- so, to convert from Map where keys have dotted notation into logical structure represented? That makes sense.

Technically should be easy, just need to figure out API: could be readMapAs(...) I suppose, as changing signature of existing method would be risky for transitive dependencies (even if it could be source compatible as Properties implements Map).

[filiphr]

Ah. I think I understand -- so, to convert from Map where keys have dotted notation into logical structure represented? That makes sense.

Exactly that.

Properties in the end is a Map. However, I do agree with you, new method readMapAs(...) will work. My initial idea was to have a new method for it.

[cowtowncoder]

Ok cool. I added this on:

https://github.com/FasterXML/jackson-future-ideas/wiki/Jackson-Work-in-Progress

and hope to get this in 2.10.0.pr2 (and final 2.10.0) if all goes well.

[filiphr]

That's awesome. Thank you very much. If you need some help let me know