public function update($entity)
 {
     $resultado = false;
     $conexao = null;
     try {
         $conexao = ConnectionManager::getConexao();
         $conexao->beginTransaction();
         $dao = new CoordenadaDAO();
         $resultado = $dao->update($conexao, $entity);
         $conexao->commit();
     } catch (Exception $ex) {
         if ($conexao != null) {
             $conexao->rollback();
         }
         echo $ex->getMessage();
     } finally {
         $conexao = null;
     }
     return $resultado;
 }
function testeReadByCriteria($criteria)
{
    $conexao = ConnectionManager::getConexao();
    $conexao->beginTransaction();
    $dao = new CoordenadaDAO();
    $entityArray = $dao->readByCriteria($conexao, $criteria);
    if ($entityArray == null) {
        $conexao->rollback();
    } else {
        $conexao->commit();
    }
    $conexao = null;
    return $entityArray;
}