* @param authorId the primary key of the s author
* @return the s author, or <code>null</code> if a s author with the primary key could not be found
* @throws SystemException if a system exception occurred
*/
public SAuthor fetchByPrimaryKey(long authorId) throws SystemException {
SAuthor sAuthor = (SAuthor)EntityCacheUtil.getResult(SAuthorModelImpl.ENTITY_CACHE_ENABLED,
SAuthorImpl.class, authorId);
if (sAuthor == _nullSAuthor) {
return null;
}