hibernate-complex-validator

Tool for complex validation rules for use with Bean Validation API

Usage

1. Add @ValidatedBy on yout data-class that needs some complex validation:

  @ValidatedBy(SomeDataClassValidator.class)
  private class SomeDataClass {
      private String first;
      private String second;
  }

2. Implement Validator<T> with some extra logic:

public class SomeDataClassValidator implements Validator<SomeDataClass> {
    @Override
    public List<String> isValid(SomeDataClass value) {
        List<String> validMessages = new ArrayList<>();
        boolean isValid = value.getFirst() == null || value.getSecond() != null;
        if (!isValid) {
            validMessages.add("'first' shouldn't exist without 'second'!");
        }
        return validMessages;
    }
}

You can also return List with property name already defined in your ValidationMessages.properties file:

public class SomeDataClassValidator implements Validator<SomeDataClass> {
    @Override
    public List<String> isValid(SomeDataClass value) {
        List<String> validMessages = new ArrayList<>();
        boolean isValid = value.getFirst() == null || value.getSecond() != null;
        if (!isValid) {
*             validMessages.add("{some.validation.message}");
        }
        return validMessages;
    }
}

and ValidationMessages.properties should contains:

some.validation.message='first' shouldn't exist without 'second'!