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java.lang.Objectorg.springframework.dao.support.DataAccessUtils
public abstract class DataAccessUtils
Miscellaneous utility methods for DAO implementations. Useful with any data access technology.
Constructor Summary | |
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DataAccessUtils()
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Method Summary | |
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static int |
intResult(Collection results)
Return a unique int result from the given Collection. |
static long |
longResult(Collection results)
Return a unique long result from the given Collection. |
static Object |
objectResult(Collection results,
Class requiredType)
Return a unique result object from the given Collection. |
static Object |
requiredUniqueResult(Collection results)
Return a unique result object from the given Collection. |
static RuntimeException |
translateIfNecessary(RuntimeException rawException,
PersistenceExceptionTranslator pet)
Return a translated exception if this is appropriate, otherwise return the input exception. |
static Object |
uniqueResult(Collection results)
Return a unique result object from the given Collection. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DataAccessUtils()
Method Detail |
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public static Object uniqueResult(Collection results) throws IncorrectResultSizeDataAccessException
results
- the result Collection (can be null
)
null
if none
IncorrectResultSizeDataAccessException
- if more than one
result object has been found in the given Collectionpublic static Object requiredUniqueResult(Collection results) throws IncorrectResultSizeDataAccessException
results
- the result Collection (can be null
)
IncorrectResultSizeDataAccessException
- if more than one
result object has been found in the given Collection
EmptyResultDataAccessException
- if no result object
at all has been found in the given Collectionpublic static Object objectResult(Collection results, Class requiredType) throws IncorrectResultSizeDataAccessException, TypeMismatchDataAccessException
results
- the result Collection (can be null
)
IncorrectResultSizeDataAccessException
- if more than one
result object has been found in the given Collection
EmptyResultDataAccessException
- if no result object
at all has been found in the given Collection
TypeMismatchDataAccessException
- if the unique object does
not match the specified required typepublic static int intResult(Collection results) throws IncorrectResultSizeDataAccessException, TypeMismatchDataAccessException
results
- the result Collection (can be null
)
IncorrectResultSizeDataAccessException
- if more than one
result object has been found in the given Collection
EmptyResultDataAccessException
- if no result object
at all has been found in the given Collection
TypeMismatchDataAccessException
- if the unique object
in the collection is not convertable to an intpublic static long longResult(Collection results) throws IncorrectResultSizeDataAccessException, TypeMismatchDataAccessException
results
- the result Collection (can be null
)
IncorrectResultSizeDataAccessException
- if more than one
result object has been found in the given Collection
EmptyResultDataAccessException
- if no result object
at all has been found in the given Collection
TypeMismatchDataAccessException
- if the unique object
in the collection is not convertable to a longpublic static RuntimeException translateIfNecessary(RuntimeException rawException, PersistenceExceptionTranslator pet)
rawException
- exception we may wish to translatepet
- PersistenceExceptionTranslator to use to perform the translation
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