Hi,
I defined a mapper that serializes Exception's polymorphically, but the
following simple map serializes without @class attribute in its values:
Map<Integer, Exception> map = new HashMap<>();
map.put(1, new Exception("test"));
mapper.writeValueAsString(map) --> {"1":{"stackTrace":[...], ...}} //
missing *@class*
while e.g. Exception is serialized correctly:
mapper.writeValueAsString(new Exception("test")) -->
{"*@class*":"java.lang.Exception",
"stackTrace":[...], ...}
Is this intended or is there a setting, that enables transitive polymorphic
serialisation in Map values? May be I have to write
serializers/deserializers?
Here is a minimal example:
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import
com.fasterxml.jackson.databind.ObjectMapper.DefaultTypeResolverBuilder;
import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;
public class MapValues {
public static void main(String[] args) throws JsonProcessingException {
final ObjectMapper mapper = new ObjectMapper();
DefaultTypeResolverBuilder typeResolver = new
DefaultTypeResolverBuilder(DefaultTyping.NON_FINAL) {
@Override public boolean useForType(JavaType t) {
return Throwable.class.isAssignableFrom(t.getRawClass());
}};
typeResolver.init(JsonTypeInfo.Id.CLASS, null);
typeResolver.inclusion(JsonTypeInfo.As.PROPERTY);
mapper.setDefaultTyping(typeResolver);
System.out.println("Excpetion:\n" + mapper.writeValueAsString(new
Exception()));
Map<Integer, Exception> map = new HashMap<>();
map.put(Integer.valueOf(1), new Exception());
System.out.println("\nMap:\n" + mapper.writeValueAsString(map));
}
}
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