- No guarantee of the order of validation in one field
- No guarantee of the order of fields to be validated
- No guarantee of the order of error messages
- Can't use the result of validation in business logic
- e.g. it will become a bottleneck to implement "save to temporary store when it has errors" or "do correlation validation if it passes all single-field validations"
- Unclear behavior in formatting annotations when an error occurred in the validation
It seems like JSR-303 assumes:
- Two or more validations must be wrapped into one annotation
- Display only one error message per input field
- Error messages are always displayed next to the input field
