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## org.springframework.dao.annotation
Class PersistenceExceptionTranslationPostProcessor

    java.lang.Object
      org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor

All Implemented Interfaces:
  BeanClassLoaderAware, BeanFactoryAware, BeanPostProcessor, Ordered

    public class PersistenceExceptionTranslationPostProcessor

extends Object
implements BeanPostProcessor, BeanClassLoaderAware, BeanFactoryAware, Ordered

Bean post-processor that automatically applies persistence exception translation to any bean that carries the `Repository` annotation, adding a corresponding `PersistenceExceptionTranslationAdvisor` to the exposed proxy (either an existing AOP proxy or a newly generated proxy that implements all of the target's interfaces).

Translates native resource exceptions to Spring's `DataAccessException` hierarchy. Autodetects beans that implement the `PersistenceExceptionTranslator` interface, which are subsequently asked to translate candidate exceptions.

All of Spring's applicable resource factories implement the `PersistenceExceptionTranslator` interface out of the box. As a consequence, all that is usually needed to enable automatic exception translation is marking all affected beans (such as DAOs) with the `Repository` annotation, along with defining this post-processor as bean in the application context.

Since:
  2.0
Author:
  Rod Johnson, Juergen Hoeller
See Also:
  `PersistenceExceptionTranslationAdvisor`, `Repository`, `DataAccessException`, `PersistenceExceptionTranslator`

Field Summary

Fields inherited from interface org.springframework.core.Ordered
`HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE`

Constructor Summary
`PersistenceExceptionTranslationPostProcessor()`

Method Summary
`int` | `getOrder()` Return the order value of this object, with a higher value meaning greater in terms of sorting.
`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` | `setBeanClassLoader(ClassLoader classLoader)` Callback that supplies the bean `class loader` to a bean instance.
`void` | `setBeanFactory(BeanFactory beanFactory)` Callback that supplies the owning factory to a bean instance.
`void` | `setRepositoryAnnotationType(Class<? extends Annotation> repositoryAnnotationType)` Set the 'repository' annotation type.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PersistenceExceptionTranslationPostProcessor

    public PersistenceExceptionTranslationPostProcessor()

Method Detail

### setRepositoryAnnotationType

    public void setRepositoryAnnotationType(Class<? extends Annotation> repositoryAnnotationType)

  Set the 'repository' annotation type. The default required annotation type is the `Repository` annotation.

  This setter property exists so that developers can provide their own (non-Spring-specific) annotation type to indicate that a class has a repository role.

  Parameters:
    `repositoryAnnotationType` - the desired annotation type

### setBeanClassLoader

    public void setBeanClassLoader(ClassLoader classLoader)

  Description copied from interface: `BeanClassLoaderAware`
  Callback that supplies the bean `class loader` to a bean instance.

  Invoked after the population of normal bean properties but before an initialization callback such as `InitializingBean's` `InitializingBean.afterPropertiesSet()` method or a custom init-method.

  Specified by:
    `setBeanClassLoader` in interface `BeanClassLoaderAware`
  Parameters:
    `classLoader` - the owning class loader; may be `null` in which case a default `ClassLoader` must be used, for example the `ClassLoader` obtained via `ClassUtils.getDefaultClassLoader()`

### setBeanFactory

    public void setBeanFactory(BeanFactory beanFactory)
                        throws BeansException

  Description copied from interface: `BeanFactoryAware`
  Callback that supplies the owning factory to a bean instance.

  Invoked after the population of normal bean properties but before an initialization callback such as `InitializingBean.afterPropertiesSet()` or a custom init-method.

  Specified by:
    `setBeanFactory` in interface `BeanFactoryAware`
  Parameters:
    `beanFactory` - owning BeanFactory (never `null`). The bean can immediately call methods on the factory.
  Throws:
    `BeansException` - in case of initialization errors
  See Also:
    `BeanInitializationException`

### getOrder

    public int getOrder()

  Description copied from interface: `Ordered`
  Return the order value of this object, with a higher value meaning greater in terms of sorting.

  Normally starting with 0 or 1, with `Ordered.LOWEST_PRECEDENCE` indicating greatest. Same order values will result in arbitrary positions for the affected objects.

  Higher value can be interpreted as lower priority, consequently the first object has highest priority (somewhat analogous to Servlet "load-on-startup" values).

  Note that order values below 0 are reserved for framework purposes. Application-specified values should always be 0 or greater, with only framework components (internal or third-party) supposed to use lower values.

  Specified by:
    `getOrder` in interface `Ordered`
  Returns:
    the order value
  See Also:
    `Ordered.LOWEST_PRECEDENCE`

### 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
  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
  Throws:
    `BeansException` - in case of errors
  See Also:
    `InitializingBean.afterPropertiesSet()`, `FactoryBean`

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