Jackson Unable to find property 'xxx' on class: yyy

Question

I am trying to use Jackson to parse a YAML file into an object, using the following code:

yaml.loadAs(userFilterConfigInputStream, UserFilterConfiguration.class);

I get the following error:

Unable to find property 'xxx' on class: com.yyy...

I don't understand though, because my constructor seems clear:

public UserFilterConfiguration(
        @JsonProperty("groups") List<String> groups)

I have tried replacing List<String> by String or String[] , I still got the same error.

Answer 1

In the end I managed to make it work by replacing yaml.loadAs... by

ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
userFilterConfig = mapper.readValue(configFile, UserFilterConfiguration.class);