org.springframework.dao.support
Class DataAccessUtils

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

public abstract class DataAccessUtils

extends java.lang.Object

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

Since:

26.05.2004

Author:

Juergen Hoeller

Constructor Summary

DataAccessUtils()

Method Summary

static java.lang.Object	requiredUniqueResult(java.util.Collection results) Return a unique result object from the given Collection.
static java.lang.Object	uniqueResult(java.util.Collection results) Return a unique result object from the given Collection.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataAccessUtils

public DataAccessUtils()

Method Detail

uniqueResult

public static java.lang.Object uniqueResult(java.util.Collection results)
                                     throws IncorrectResultSizeDataAccessException

Return a unique result object from the given Collection. Returns null if 0 result objects found; throws an exception if more than 1 found.

Parameters:

results - the result Collection

Returns:

the unique result object, or null if none

Throws:

IncorrectResultSizeDataAccessException - if more than one result object has been found in the given Collection

requiredUniqueResult

public static java.lang.Object requiredUniqueResult(java.util.Collection results)
                                             throws IncorrectResultSizeDataAccessException

Return a unique result object from the given Collection. Throws an exception if 0 or more than 1 result objects found.

Parameters:

results - the result Collection

Returns:

the unique result object, or null if none

Throws:

IncorrectResultSizeDataAccessException - if more than one result object has been found in the given Collection