Roundtrip Serializing/Deserializing a Feature fails

[DustinReagan]

See this StackOverflow link for details.

[DGuidi]

the presence of \"properties\":null looks the cause of the bug.

[DGuidi]

fixed. can you check if this fix resolve your issues?
anyway, thanks for reporting this :)

[FObermaier]

@DGuidi: The question is where does "properties":null come from in the first place? Was that created by the GeoJsonWriter and if so, does that conform to the json/geojson standard.

[DGuidi]

@FObermaier heres' my thoughts

1. good question: issue doesn't provide initial feature object used in with GeoJSONWriter, but I can make some additional checks.
2. GeoJSON specs explicitly allows null.

a feature object must have a member with the name "properties". The value of the properties member is an object (any JSON object or a JSON null value).

[DGuidi]

@DustinReagan can you provide a sample code that generates a GeoJSON with \"properties\":null?
I've made some checks and I'm unable to generate a similar json using GeoJSONWriter

[DustinReagan]

@DustinReagan can you provide a sample code that generates a GeoJSON with "properties":null?
I've made some checks and I'm unable to generate a similar json using GeoJSONWriter

@DGuidi Sure:

Geometry geometry = SomeMethodThatCreatesAGeometry(); Feature feature = new Feature(geometry, null);

Thanks for looking into this bug. For now, I've just resolved my issue by doing:

Feature feature = new Feature(geometry, new AttributeTable());

[DGuidi]

Tried code like this but geojson writer doesn't produce a json string but throws exception, at least using latest master.
I give some other checks soon. Thanks again.

[FObermaier]

With 243ede3 the following improvements have been made to the converter objects:

• when serializing, they obey to JsonSerializer.NullValueHandling
• when deserializing, they don't fail when encountering null tokens.