org.springframework.validation.beanvalidation

## Class BeanValidationPostProcessor

- java.lang.Object
- - org.springframework.validation.beanvalidation.BeanValidationPostProcessor

- All Implemented Interfaces:
    BeanPostProcessor, InitializingBean

      public class BeanValidationPostProcessor
      extends Object
      implements BeanPostProcessor, InitializingBean

  Simple `BeanPostProcessor` that checks JSR-303 constraint annotations in Spring-managed beans, throwing an initialization exception in case of constraint violations right before calling the bean's init method (if any).
  Since:
    3.0
  Author:
    Juergen Hoeller

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `BeanValidationPostProcessor()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `afterPropertiesSet()` Invoked by the containing `BeanFactory` after it has set all bean properties and satisfied `BeanFactoryAware`, `ApplicationContextAware` etc.
    `protected void` | `doValidate(Object bean)` Perform validation of the given bean.
    `Object` | `postProcessAfterInitialization(Object bean, String beanName)` Apply this `BeanPostProcessor` to the given new bean instance after any bean initialization callbacks (like InitializingBean's `afterPropertiesSet` or a custom init-method).
    `Object` | `postProcessBeforeInitialization(Object bean, String beanName)` Apply this `BeanPostProcessor` to the given new bean instance before any bean initialization callbacks (like InitializingBean's `afterPropertiesSet` or a custom init-method).
    `void` | `setAfterInitialization(boolean afterInitialization)` Choose whether to perform validation after bean initialization (i.e.
    `void` | `setValidator(Validator validator)` Set the JSR-303 Validator to delegate to for validating beans.
    `void` | `setValidatorFactory(ValidatorFactory validatorFactory)` Set the JSR-303 ValidatorFactory to delegate to for validating beans, using its default Validator.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### BeanValidationPostProcessor

          public BeanValidationPostProcessor()

  - ### Method Detail

    - #### setValidator

          public void setValidator(Validator validator)

      Set the JSR-303 Validator to delegate to for validating beans.

      Default is the default ValidatorFactory's default Validator.

    - #### setValidatorFactory

          public void setValidatorFactory(ValidatorFactory validatorFactory)

      Set the JSR-303 ValidatorFactory to delegate to for validating beans, using its default Validator.

      Default is the default ValidatorFactory's default Validator.

      See Also:
        `ValidatorFactory.getValidator()`

    - #### setAfterInitialization

          public void setAfterInitialization(boolean afterInitialization)

      Choose whether to perform validation after bean initialization (i.e. after init methods) instead of before (which is the default).

      Default is "false" (before initialization). Switch this to "true" (after initialization) if you would like to give init methods a chance to populate constrained fields before they get validated.

    - #### afterPropertiesSet

          public void afterPropertiesSet()

      Description copied from interface: `InitializingBean`
      Invoked by the containing `BeanFactory` after it has set all bean properties and satisfied `BeanFactoryAware`, `ApplicationContextAware` etc.

      This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

      Specified by:
        `afterPropertiesSet` in interface `InitializingBean`

    - #### postProcessBeforeInitialization

          public Object postProcessBeforeInitialization(Object bean,
                                                        String beanName)
                                                 throws BeansException

      Description copied from interface: `BeanPostProcessor`
      Apply this `BeanPostProcessor` to the given new bean instance before any bean initialization callbacks (like InitializingBean's `afterPropertiesSet` or a custom init-method). The bean will already be populated with property values. The returned bean instance may be a wrapper around the original.

      The default implementation returns the given `bean` as-is.

      Specified by:
        `postProcessBeforeInitialization` in interface `BeanPostProcessor`
      Parameters:
        `bean` - the new bean instance
        `beanName` - the name of the bean
      Returns:
        the bean instance to use, either the original or a wrapped one; if `null`, no subsequent BeanPostProcessors will be invoked
      Throws:
        `BeansException` - in case of errors
      See Also:
        `InitializingBean.afterPropertiesSet()`

    - #### postProcessAfterInitialization

          public Object postProcessAfterInitialization(Object bean,
                                                       String beanName)
                                                throws BeansException

      Description copied from interface: `BeanPostProcessor`
      Apply this `BeanPostProcessor` to the given new bean instance after any bean initialization callbacks (like InitializingBean's `afterPropertiesSet` or a custom init-method). The bean will already be populated with property values. The returned bean instance may be a wrapper around the original.

      In case of a FactoryBean, this callback will be invoked for both the FactoryBean instance and the objects created by the FactoryBean (as of Spring 2.0). The post-processor can decide whether to apply to either the FactoryBean or created objects or both through corresponding `bean instanceof FactoryBean` checks.

      This callback will also be invoked after a short-circuiting triggered by a `InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation(java.lang.Class<?>, java.lang.String)` method, in contrast to all other `BeanPostProcessor` callbacks.

      The default implementation returns the given `bean` as-is.

      Specified by:
        `postProcessAfterInitialization` in interface `BeanPostProcessor`
      Parameters:
        `bean` - the new bean instance
        `beanName` - the name of the bean
      Returns:
        the bean instance to use, either the original or a wrapped one; if `null`, no subsequent BeanPostProcessors will be invoked
      Throws:
        `BeansException` - in case of errors
      See Also:
        `InitializingBean.afterPropertiesSet()`, `FactoryBean`

    - #### doValidate

          protected void doValidate(Object bean)

      Perform validation of the given bean.
      Parameters:
        `bean` - the bean instance to validate
      See Also:
        `Validator.validate(T, java.lang.Class<?>...)`