How to serialize MongoDB Filters in Java?

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How to serialize MongoDB Filters in Java?



How can I serialize Filters. Suppose I have a class like this:


public class RequestArguments
private Bson filter;
public Bson getFilter()
return filter;

public void setFilter(Bson filter)
this.filter = filter;




And I want to have something like the following as serialized:


...
RequestArguments args = new RequestArguments();
args.setFilter(Filters.eq("fieldName", 213));
...
new ObjectMapper().writeValueAsString();



And this is what I get as a result:


com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.mongodb.client.model.Filters$SimpleEncodingFilter and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: de.emmasbox.mongo.client.Main$1["filter"])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1191)
at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:312)
at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71)
at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeWithType(BeanSerializerBase.java:604)
at com.fasterxml.jackson.databind.ser.impl.TypeWrappedSerializer.serialize(TypeWrappedSerializer.java:32)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3905)
at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3219)
at de.emmasbox.mongo.client.Main.main(Main.java:66)



I might be wrong in doing it but what I expect in the end is something like:



"$eq", "fieldName", 213









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