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If I have the following dto in spring boot

public class PersonDto {

@JsonProperty(access = Access.READ_ONLY)
private Long id;

@NotBlank
private String name;
    
//@NotNull
@JsonProperty(access = Access.READ_ONLY)
private Integer age;
}

And I want to perform a HTTP PATCH following this standard, which is implemented by the JsonPatch library, I would write something like this to get the patched JsonNode

JsonNode patched = patch.apply(objectMapper.convertValue(target, JsonNode.class));

However when performing a patch operation like the following, the @JsonProperty(access = Access.READ_ONLY) won't make any effect(meaning that age would be set to 12)

[ {"op":"replace","path":"/age","value": 12} ]

I've also tried the following afterwards

return objectMapper.treeToValue(patched, PersonDto.class)

But here the age is set to null

So, the expected behaviour I want to achieve is the following:

Whenever I receive a patch operation that attempts to replace the value of 'age', I want that operation to be ignored, since age is read-only.

I know I could create if statements in the controller to check each patch operation and ignore it if it attempts to change a field that I want to be read-only like age, but I would rather do this with jackson annotations. Is this possible?

I did follow this tutorial in case you want to check it out

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David de Castro
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  • You can disable the `USE_ANNOTATIONS` feature of `ObjectMapper` in the layer where you are processing patch requests. See https://stackoverflow.com/a/57322279/2039546 – İsmail Y. Jan 03 '21 at 17:57
  • Im sorry, but could you elaborate more on that, I just dont see how that solves my problem, since I want to use the notations not disable them – David de Castro Jan 03 '21 at 22:36

0 Answers0