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

Methods
`void` `afterPropertiesSet()` Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
`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 a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

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.

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.

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<?>...)`