@Constraint मान्य के कारण परतों के बीच पार निर्भरता से कैसे बचें?

2012-07-30 calavera.info

public interface UniqueValidator extends ConstraintValidator<Unique, String> { 
} 

public class UniqueValidatorJpaImpl implements UniqueValidator { 
    private EntityManager entityManager; 
    ... 
} 

public class SpringConstraintValidatorFactoryEx implements ConstraintValidatorFactory { 

    private final Logger logger = LoggerFactory.getLogger(SpringConstraintValidatorFactoryEx.class); 

    @Autowired 
    private AutowireCapableBeanFactory beanFactory; 

    public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> key) { 
     T bean = null; 

     try { 
      logger.info("Trying to find a validator bean of class " + key.getSimpleName()); 
      bean = this.beanFactory.getBean(key); 
     } catch (BeansException exc) { 
      logger.info("Failed to find a bean of class " + key.getSimpleName()); 
     } 

     if (bean == null) { 
      try { 
       logger.info("Creating a new validator bean of class " + key.getSimpleName()); 
       bean = this.beanFactory.createBean(key); 
      } catch (BeansException exc) { 
       logger.info("Failed to create a validator of class " + key.getSimpleName()); 
      } 
     } 

     if (bean == null) { 
      logger.warn("Failed to get validator of class " + key.getSimpleName()); 
     } 

     return bean; 
    } 

}

@Constraint मान्य के कारण परतों के बीच पार निर्भरता से कैसे बचें?

उत्तर

संबंधित मुद्दे