Java / jersey / jackson - JSON input confirmation

Question

I am writing a REST API with a Java / Jersey / Jackson stack. All JSON parsing and generation is done using Jackson. REST level handled by jersey. It will be built into the Grizzly container.

In my API, I accept JSON at my endpoints. For instance:

@POST
public Response post(final SomeObject input) {
    return ...;
}

What is the best way to check input? There are some things that I would like to confirm:

• input must not be null
• certain fields inputmust not be empty
• certain fields inputmust follow regular expression (text fields)
• certain fields inputmust be in a range (numeric fields)
• ...

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Answer 1

BeanValidationApi (javax.validation.constraints), @NotNull,@Pattern .. Bean

Answer 2

JSON Schema.

Jackson, , .

However, this means that you will need to change your logic to get JSON (how JsonNode) instead of serialized POJO and only then serialize it to POJO.