ChainedPersistenceExceptionTranslator (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.dao.support
Class ChainedPersistenceExceptionTranslator

java.lang.Object
  org.springframework.dao.support.ChainedPersistenceExceptionTranslator

All Implemented Interfaces:: PersistenceExceptionTranslator

public class ChainedPersistenceExceptionTranslator
extends Object
implements PersistenceExceptionTranslator
extends Object
implements PersistenceExceptionTranslator

Implementation of PersistenceExceptionTranslator that supports chaining, allowing the addition of PersistenceExceptionTranslator instances in order. Returns non-null on the first (if any) match.

Since:: 2.0
Author:: Rod Johnson, Juergen Hoeller

Constructor Summary

ChainedPersistenceExceptionTranslator()


Method Summary

void addDelegate(PersistenceExceptionTranslator pet)
          Add a PersistenceExceptionTranslator to the chained delegate list.

PersistenceExceptionTranslator[] getDelegates()
          Return all registered PersistenceExceptionTranslator delegates (as array).

DataAccessException translateExceptionIfPossible(RuntimeException ex)
          Translate the given runtime exception thrown by a persistence framework to a corresponding exception from Spring's generic DataAccessException hierarchy, if possible.

Methods inherited from class java.lang.Object

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

Constructor Summary
`ChainedPersistenceExceptionTranslator()`

Method Summary
`void`	`addDelegate(PersistenceExceptionTranslator pet)` Add a PersistenceExceptionTranslator to the chained delegate list.
`PersistenceExceptionTranslator[]`	`getDelegates()` Return all registered PersistenceExceptionTranslator delegates (as array).
`DataAccessException`	`translateExceptionIfPossible(RuntimeException ex)` Translate the given runtime exception thrown by a persistence framework to a corresponding exception from Spring's generic DataAccessException hierarchy, if possible.

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

Constructor Detail

ChainedPersistenceExceptionTranslator

public ChainedPersistenceExceptionTranslator()

Method Detail

addDelegate

public final void addDelegate(PersistenceExceptionTranslator pet)

Add a PersistenceExceptionTranslator to the chained delegate list.

getDelegates

public final PersistenceExceptionTranslator[] getDelegates()

Return all registered PersistenceExceptionTranslator delegates (as array).

translateExceptionIfPossible

public DataAccessException translateExceptionIfPossible(RuntimeException ex)

Description copied from interface: PersistenceExceptionTranslator

Translate the given runtime exception thrown by a persistence framework to a corresponding exception from Spring's generic DataAccessException hierarchy, if possible.

Do not translate exceptions that are not understand by this translator: for example, if coming from another persistence framework, or resulting from user code and unrelated to persistence.

Of particular importance is the correct translation to DataIntegrityViolationException, for example on constraint violation. Implementations may use Spring JDBC's sophisticated exception translation to provide further information in the event of SQLException as a root cause.

Specified by:: translateExceptionIfPossible in interface PersistenceExceptionTranslator

Parameters:: ex - a RuntimeException thrown
Returns:: the corresponding DataAccessException (or null if the exception could not be translated, as in this case it may result from user code rather than an actual persistence problem)
See Also:: DataIntegrityViolationException, SQLExceptionTranslator