不需要对象关联的转换器
private static class MyResultTransformer<E> implements ResultTransformer
{
private static final long serialVersionUID = 3592627688907737019L;

private final Class<E> resultClass;

private Setter[] setters;

private PropertyAccessor propertyAccessor;

public MyResultTransformer(Class<E> resultClass)
{
if (resultClass == null)
throw new IllegalArgumentException("resultClass cannot be null");
this.resultClass = resultClass;
propertyAccessor = new ChainedPropertyAccessor(
new PropertyAccessor[]
{
PropertyAccessorFactory.getPropertyAccessor(
resultClass, null),
PropertyAccessorFactory
.getPropertyAccessor("field") });
}

public Object transformTuple(Object[] tuple, String[] aliases)
{
Object result;

try
{
if (setters == null)
{
setters = new Setter[aliases.length];
for (int i = 0; i < aliases.length; i++)
{
String alias = aliases[i];
if (alias != null)
{
setters[i] = propertyAccessor.getSetter(
resultClass, alias);
}
}
}
result = resultClass.newInstance();

for (int i = 0; i < aliases.length; i++)
{
if (setters[i] != null)
{
if (tuple[i] instanceof BigDecimal)
{
setters[i].set(result, ((BigDecimal) tuple[i])
.longValue(), null);
}
else if (tuple[i] instanceof BigInteger)
{
setters[i].set(result, ((BigInteger) tuple[i])
.longValue(), null);
}
else
{
setters[i].set(result, tuple[i], null);
}
}
}
}
catch (InstantiationException e)
{
throw new HibernateException(
"Could not instantiate resultclass: "
+ resultClass.getName());
}
catch (IllegalAccessException e)
{
throw new HibernateException(
"Could not instantiate resultclass: "
+ resultClass.getName());
}

return result;
}

public List transformList(List collection)
{
return collection;
}

}