'Jackson CsvMapper to map object with a map of maps to csv

I have a complex java object that I want to map to csv using Jacksons CsvMapper.

public class TestObject {
  private Map<String, Map<String, String>> values;
  @JsonAnyGetter
  public Map<String, Map<String, String>> getValues() {
      return values;
  }

  @JsonAnySetter
  public void setValues(Map<String, Map<String, String>> values) {
    this.values = values;
  }

}

The object is a list of TestObjects:

 CsvMapper mapper = new CsvMapper(); 
 CsvSchema schema = mapper.schemaFor(clazz).withUseHeader(true);
 
 ObjectWriter myObjectWriter = mapper.writer(schema);
 return myObjectWriter.writeValueAsString(objectList);

However when I try to map this to csv, I get an error due to the values in the map since its a map of map.

Caused by: com.fasterxml.jackson.dataformat.csv.CsvMappingException: Unrecognized column 'test_column': known columns: ....

Does anyone know how I can get jacksons csvmapper to correctly convert this map of maps to csv?

javacsvjackson


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