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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.dao.support

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.springframework.dao.support .DataAccessUtils

DataAccessUtils
abstract public class DataAccessUtils (Code)
	Miscellaneous utility methods for DAO implementations. Useful with any data access technology. author: Juergen Hoeller since: 1.0.2

Method Summary
public static int	intResult(Collection results) Return a unique int result from the given Collection.
public static long	longResult(Collection results) Return a unique long result from the given Collection.
public static Object	objectResult(Collection results, Class requiredType) Return a unique result object from the given Collection.
public static Object	requiredSingleResult(Collection results) Return a single result object from the given Collection.
public static Object	requiredUniqueResult(Collection results) Return a unique result object from the given Collection.
public static Object	singleResult(Collection results) Return a single result object from the given Collection.
public static RuntimeException	translateIfNecessary(RuntimeException rawException, PersistenceExceptionTranslator pet) Return a translated exception if this is appropriate, otherwise return the input exception.
public static Object	uniqueResult(Collection results) Return a unique result object from the given Collection.

Method Detail

intResult
public static int intResult(Collection results) throws IncorrectResultSizeDataAccessException, TypeMismatchDataAccessException(Code)
	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 convertable to an int. Parameters: results - the result Collection (can be `null`) the unique int result throws: IncorrectResultSizeDataAccessException - if more than oneresult object has been found in the given Collection throws: EmptyResultDataAccessException - if no result objectat all has been found in the given Collection throws: TypeMismatchDataAccessException - if the unique objectin the collection is not convertable to an int

longResult
public static long longResult(Collection results) throws IncorrectResultSizeDataAccessException, TypeMismatchDataAccessException(Code)
	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 convertable to a long. Parameters: results - the result Collection (can be `null`) the unique long result throws: IncorrectResultSizeDataAccessException - if more than oneresult object has been found in the given Collection throws: EmptyResultDataAccessException - if no result objectat all has been found in the given Collection throws: TypeMismatchDataAccessException - if the unique objectin the collection is not convertable to a long

objectResult
public static Object objectResult(Collection results, Class requiredType) throws IncorrectResultSizeDataAccessException, TypeMismatchDataAccessException(Code)
	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 convertable to the specified required type. Parameters: results - the result Collection (can be `null`) the unique result object throws: IncorrectResultSizeDataAccessException - if more than oneresult object has been found in the given Collection throws: EmptyResultDataAccessException - if no result objectat all has been found in the given Collection throws: TypeMismatchDataAccessException - if the unique object doesnot match the specified required type

requiredSingleResult
public static Object requiredSingleResult(Collection results) throws IncorrectResultSizeDataAccessException(Code)
	Return a single result object from the given Collection. Throws an exception if 0 or more than 1 element found. Parameters: results - the result Collection (can be `null`) the single result object throws: IncorrectResultSizeDataAccessException - if more than oneelement has been found in the given Collection throws: EmptyResultDataAccessException - if no element at allhas been found in the given Collection

requiredUniqueResult
public static Object requiredUniqueResult(Collection results) throws IncorrectResultSizeDataAccessException(Code)
	Return a unique result object from the given Collection. Throws an exception if 0 or more than 1 instance found. Parameters: results - the result Collection (can be `null`) the unique result object throws: IncorrectResultSizeDataAccessException - if more than oneresult object has been found in the given Collection throws: EmptyResultDataAccessException - if no result object at allhas been found in the given Collection See Also: org.springframework.util.CollectionUtils.hasUniqueObject

singleResult
public static Object singleResult(Collection results) throws IncorrectResultSizeDataAccessException(Code)
	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. Parameters: results - the result Collection (can be `null`) the single result object, or `null` if none throws: IncorrectResultSizeDataAccessException - if more than oneelement has been found in the given Collection

translateIfNecessary
public static RuntimeException translateIfNecessary(RuntimeException rawException, PersistenceExceptionTranslator pet)(Code)
	Return a translated exception if this is appropriate, otherwise return the input exception. Parameters: rawException - exception we may wish to translate Parameters: pet - PersistenceExceptionTranslator to use to perform the translation a translated exception if translation is possible, orthe raw exception if it is not

uniqueResult
public static Object uniqueResult(Collection results) throws IncorrectResultSizeDataAccessException(Code)
	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. Parameters: results - the result Collection (can be `null`) the unique result object, or `null` if none throws: IncorrectResultSizeDataAccessException - if more than oneresult object has been found in the given Collection See Also: org.springframework.util.CollectionUtils.hasUniqueObject

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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