Composable Constraints

[SentryMan]

• Now Generates Groups as a Set.of instead of list
• add a constraint annotation for composing constraints (if an annotation has @Constraint, the generator will check the other annotation on the element for constraints)
• will generate an annotation adapter class for composable constraints
• rename processor
• adds a new method to validation context to retrieve an annotation adapter( overriding the message and groups)

fixes #62

Given the annotation:

@Target({FIELD})
@Retention(SOURCE)
@Constraint
@Combining2(message = "sus")
@NotNull
public @interface Combining {

  String message();

  Class<?>[] groups() default {};
}

The following will be generated

@Generated
@AnnotationValidator(Combining.class)
public final class CombiningValidationAdapter implements ValidationAdapter<Object> {

  private final ValidationAdapter<Object> adapter;

  public CombiningValidationAdapter(ValidationContext ctx, Set<Class<?>> groups, Map<String, Object> attributes) {
    final var message = ctx.<Object>message(attributes).template();
    this.adapter =
        ctx.adapter(Combining2.class, groups, message, Map.of("message","sus", "groups",Set.of()))
            .andThen(ctx.adapter(NotNull.class, groups, message, Map.of("message","{avaje.NotNull.message}")));
  }

  @Override
  public boolean validate(Object value, ValidationRequest req, String propertyName) {

    return adapter.validate(value, req);
  }

}

the message and group annotations of the composed constraints are ignored

[rob-bygrave]

Does Constraint have to be in validator module rather than in validator-constraints module?
This is still in draft (or completed now)?

[SentryMan]

I'm good with this now