[hibernate-issues] [Hibernate-JIRA] Created: (BVAL-211) Consider making javax.validation.ValidatorContext a self-referential generic type
Consider making javax.validation.ValidatorContext a self-referential generic type
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Key: BVAL-211
URL: http://opensource.atlassian.com/projects/hibernate/browse/BVAL-211
Project: Bean Validation
Issue Type: Improvement
Components: spec-general
Affects Versions: 1.0 final
Reporter: Gunnar Morling
Priority: Minor
It should be investigated whether the interface javax.validation.ValidatorContext could be
re-defined as self-referential generic type as follows:
{code:java}
public interface ValidatorContext <V extends ValidatorContext<V>> {
V messageInterpolator(MessageInterpolator messageInterpolator);
V traversableResolver(TraversableResolver traversableResolver);
V constraintValidatorFactory(ConstraintValidatorFactory factory);
Validator getValidator();
}
{code}
Provider-specific extensions of this interface (such as
[HibernateValidatorContext|https://github.com/hibernate/hibernate-validato...])
then wouldn't have to re-define all of ValidatorContext's methods returning their
own type (which they currently must do in order to allow for the method chaining pattern
to work correctly).
Generally this is a breaking change, as existing implementations wouldn't compile with
the proposed new version of the interface. But as it is intended to be implemented by BV
providers only, this seems acceptable. API users would get a raw type warning if they have
variables of type ValidatorContext. This should happen very rarely though, as
ValidatorContext typically is only used in chained method calls (with a final
getValidator() invocation) but not assigned to a variable.
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