org.springframework.dao.annotation
Class PersistenceExceptionTranslationPostProcessor

java.lang.Object
  extended by org.springframework.aop.framework.ProxyConfig
      extended by org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor
All Implemented Interfaces:
Serializable, Aware, BeanClassLoaderAware, BeanFactoryAware, BeanPostProcessor, Ordered

public class PersistenceExceptionTranslationPostProcessor
extends ProxyConfig
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, Serialized Form

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 org.springframework.aop.framework.ProxyConfig
copyFrom, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setExposeProxy, setFrozen, setOpaque, setOptimize, setProxyTargetClass, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, 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 repository 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, with Integer.MAX_VALUE indicating the greatest value. Same order values will result in arbitrary positions for the affected objects.

Higher values can be interpreted as lower priority. As a consequence, the object with the lowest value has highest priority (somewhat analogous to Servlet "load-on-startup" values).

Specified by:
getOrder in interface Ordered
Returns:
the order value

postProcessBeforeInitialization

public Object postProcessBeforeInitialization(Object bean,
                                              String beanName)
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
See Also:
InitializingBean.afterPropertiesSet()

postProcessAfterInitialization

public Object postProcessAfterInitialization(Object bean,
                                             String beanName)
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
See Also:
InitializingBean.afterPropertiesSet(), FactoryBean