Bug

[glascaleia]

Hi All i have this situation.
My Bean
@JsonRootName(value = "test")
public class TestBean implements ITestBean {
private Map<String, Object> values;
//get and set
}

@JsonDeserialize(as = TestBean.class)
public interface ITestBean {
Map<String, Object> getValues();
void setValues(Map<String, Object> theValues);
}

If i tried to use ObjectMaper and deserialize this code i have error :
ITestBean testBean = objectMapper.readValue(new StringReader("{
"test" :
"values" : {
"value1" : "test",
"value" : true
}
}
}"), ITestBean.class);
The error is :
java.util.MissingFormatArgumentException: Format specifier '%s'
at java.util.Formatter.format(Formatter.java:2519)
at java.util.Formatter.format(Formatter.java:2455)
at java.lang.String.format(String.java:2940)
at com.fasterxml.jackson.databind.DatabindContext._format(DatabindContext.java:326)
at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1341)
at com.fasterxml.jackson.databind.ObjectMapper._unwrapAndDeserialize(ObjectMapper.java:4076)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3999)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3037)

Regards Giuseppe

[cowtowncoder]

Thank you for reporting this. Which version is this with? 2.9.1?

[cowtowncoder]

Ok I think reproduction is missing one important piece: mapper MUST be configured with

DeserializationFeature.UNWRAP_ROOT_VALUE

enabled. But with that, test now passes.

This is because I think what you saw was this bug:

FasterXML/jackson-databind#1771

which is fixed, but waiting for new release, 2.9.2.