Few tips in practice

Let's have a look at the following tips:

• Dealing with null: If you use the following code and try to obtain the JSON string, then you might be surprised by the output:

    Issue issue= new Issue();
    issue.setId(200L);
    issue.setName("Test");
    issue.setPriority(null);

    Jsonb jsonb = JsonbBuilder.create();
    String jsonString = jsonb.toJson(issue); // JSON String

Here, the output would ignore the priority field as it's having a null value. This is the default behavior, but it can be changed using multiple ways. A convenient option is to change it globally by using the JsonbConfig class:

    JsonbConfig nillableConfig = new JsonbConfig()
            .withNullValues(true);

Other options include using the @JsonbNillable annotation on the class or using @JsonbProperty(nillable=true).

• Use Adapters for more control: When annotations aren't an option, such as for cases where you may not be in control of the code of the class which is being serialized, then you can make...