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Should you validate in constructor?
If you do not trust the source (like sql parameters etc), then you should validate them and possibly sanitize the input before executing further code. This prevents security attacks. I am always weary to do validation and parameter checking in the constructor.
How do you validate a constructor?
How to validate constructor parameters on Java?
- On constructor add the if() described above.
- Validate somewhere outside the constructor – whether it’s a factory method, builder class etc.
- To validate constructors parameters by using Validate.
- Any other good way I missed?
What does it mean to validate input?
Input validation, also known as data validation, is the proper testing of any input supplied by a user or application. Input validation prevents improperly formed data from entering an information system. Incorrect input validation can lead to injection attacks, memory leakage, and compromised systems.
What are input validation methods?
Input validation is the process of testing input received by the application for compliance against a standard defined within the application. It can be as simple as strictly typing a parameter and as complex as using regular expressions or business logic to validate input.
What is MethodValidationPostProcessor?
public class MethodValidationPostProcessor extends AbstractBeanFactoryAwareAdvisingPostProcessor implements InitializingBean. A convenient BeanPostProcessor implementation that delegates to a JSR-303 provider for performing method-level validation on annotated methods.
What is the constraint associated with super keyword in a constructor?
It is used inside a sub-class method definition to call a method defined in the super class. Private methods of the super-class cannot be called. Only public and protected methods can be called by the super keyword. It is also used by class constructors to invoke constructors of its parent class.
What does @validated annotation do?
The @Valid annotation ensures the validation of the whole object. Importantly, it performs the validation of the whole object graphs. However, this creates issues for scenarios needing only partial validation. On the other hand, we can use @Validated for group validation, including the above partial validation.