spring-framework / org.springframework.dao.support / DataAccessUtils

DataAccessUtils

abstract class DataAccessUtils

Miscellaneous utility methods for DAO implementations. Useful with any data access technology.

Author
Juergen Hoeller

Since
1.0.2

Constructors

<init>

DataAccessUtils()

Miscellaneous utility methods for DAO implementations. Useful with any data access technology.

Functions

intResult	`open static fun intResult(results: MutableCollection<*>): Int` Return a unique int result from the given Collection. Throws an exception if 0 or more than 1 result objects found, of if the unique result object is not convertible to an int.
longResult	`open static fun longResult(results: MutableCollection<*>): Long` Return a unique long result from the given Collection. Throws an exception if 0 or more than 1 result objects found, of if the unique result object is not convertible to a long.
nullableSingleResult	`open static fun <T : Any> nullableSingleResult(results: MutableCollection<T>): T` Return a single result object from the given Collection. Throws an exception if 0 or more than 1 element found.
objectResult	`open static fun <T : Any> objectResult(results: MutableCollection<*>, requiredType: Class<T>): T` Return a unique result object from the given Collection. Throws an exception if 0 or more than 1 result objects found, of if the unique result object is not convertible to the specified required type.
requiredSingleResult	`open static fun <T : Any> requiredSingleResult(results: MutableCollection<T>): T` Return a single result object from the given Collection. Throws an exception if 0 or more than 1 element found.
requiredUniqueResult	`open static fun <T : Any> requiredUniqueResult(results: MutableCollection<T>): T` Return a unique result object from the given Collection. Throws an exception if 0 or more than 1 instance found.
singleResult	`open static fun <T : Any> singleResult(results: MutableCollection<T>): T` Return a single result object from the given Collection. Returns `null` if 0 result objects found; throws an exception if more than 1 element found.
translateIfNecessary	`open static fun translateIfNecessary(rawException: RuntimeException, pet: PersistenceExceptionTranslator): RuntimeException` Return a translated exception if this is appropriate, otherwise return the given exception as-is.
uniqueResult	`open static fun <T : Any> uniqueResult(results: MutableCollection<T>): T` Return a unique result object from the given Collection. Returns `null` if 0 result objects found; throws an exception if more than 1 instance found.