Frequently Asked Questions

  1. Why yet another Java validation framework?
  2. How do I use the validation DSL?
  3. Are BeanValidator instances thread-safe?
  4. Can I use this library with the Spring Framework and Spring-MVC?
Why yet another Java validation framework?

This project started as an attemp to explore embedded domain specific languages in Java, after reading the paper Evolving an Embedded Domain-Specific Language in Java, by Steve Freeman and Nat Pryce (OOPSLA 2006).

The project's goal is to provide a simple, pure Java, validator with an API that is easy to read, easy to program and feels like a special purpose validation language.

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How do I use the validation DSL?

Use the BeanValidator and import all the static methods from the Validators class. 

          import static com.tzavellas.validation.Validators.*;
          import com.tzavellas.validation.BeanValidator;
          
          BeanValidator validator = new BeanValidator(
                    string("firstName").required(),
                    string("lastName").required(),
                    string("email").required().email(),
                    integer("age").min(18),
                    date("birthdate").past());

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Are BeanValidator instances thread-safe?

Yes, multiple threads can access concurrently the same BeanValidator instance.

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Can I use this library with the Spring Framework and Spring-MVC?

Yes!

See the SpringValidator's documentation and test case for more details.

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