How to ignore certain fields with Jackson's ObjectMapper.readerForUpdating

Question

I'm using Jackson 2.7.0

I'm trying to ignore encodingType when updating an existing object with some new values:

ObjectMapper om = new ObjectMapper();
om.readerForUpdating(message).readValue(messageSubset);

message contains a value for encodingType.
messageSubset (JSON-string) does not contain an entry (no key-value) for encodingType.

What I've tried:

For the ObjectMapper:
- om.setSerializationInclusion(Include.NON_EMPTY);
On the message class:
- @JsonIgnoreProperties(ignoreUnknown = true)
- @JsonIgnoreProperties(value = { "encodingType" })
- @JsonInclude(Include.NON_EMPTY)
- @JsonInclude(Include.NON_NULL)
On the field and on the getters/setters:
- @JsonInclude(Include.NON_EMPTY)
- @JsonInclude(Include.NON_NULL)
- @JsonIgnore
- @JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)

Non of the above work! Any help?
I suppose this has something to do with readerForUpdating and/or the fact that one of them is being updated.

I've just tried your code with a dummy `Message` class where `encodingType` is a `String` and it works fine. No annotations needed. Could you post the code for class of `message` and an example JSON ? — Manos Nikolaidis, Mar 07 '16 at 15:13
I fixed the problem by configering the ObjectMapper like this: `om.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);` `om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);` `om.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES, false);` And on the Message class for the correct properties: `@JsonIgnore` on the setter `@JsonProperty` on the getter — Thomas Stubbe, Mar 08 '16 at 10:22

score 3 · Accepted Answer · answered Mar 08 '16 at 10:27

I fixed the problem by configuring the ObjectMapper like this (not sure if these are all needed though):

om.setSerializationInclusion(JsonInclude.Include.NON_EMPTY); om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); om.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES, false);

And on the Message class for the properties needed:

@JsonIgnore on the setter (excludes it when parsing to the Java object)
@JsonProperty on the getter (includes it when parsing to the JSON object)

How to ignore certain fields with Jackson's ObjectMapper.readerForUpdating

1 Answers1