Make your code more readable and protect it against null pointer exceptions.

In the context of software or information modeling, a happy path (sometimes called happy flow) is a default scenario featuring no exceptional or error conditions. For example, the happy path for a function validating credit card numbers would be where none of the validation rules raise an error, thus letting execution continue successfully to the end, generating a positive response.

Sponsored by Mysema, Querydsl is similar to Hibernate, which offers programmable and type-safe query construction. For example

List<Tuple> tuples = queryFactory
        .select(person.lastName, person.firstName, person.yearOfBirth)
        .from(person)
        .fetch();

We should choose between PUT and POST based on idempotence of the action.