<?php
public static function retrieveByUserAndPermissionName(FieldUser $user, $name, Criteria $c = null)
{
    if (null !== $obj = self::getInstanceFromPool('retrieveByUserAndPermissionName' . $user->getId() . $name)) {
        return $obj;
    }

    if (is_null($c)) {
        $c = new Criteria();
    } else {
        $c = clone $c;
    }

    $c->addJoin(FieldRolePermissionPeer::PERMISSION_ID, FieldPermissionPeer::ID);

    $userRolePermissions = self::doSelectJoinFieldPermission(self::userCriteria($user, $c));

    foreach ($userRolePermissions as $userRolePermission) {
        self::addInstanceToPool($userRolePermission, 'retrieveByUserAndPermissionName' . $user->getId() . $userRolePermission->getFieldPermission()->getName());
        if ($userRolePermission->getFieldPermission()->getName() == $name) {
            $obj = $userRolePermission;
        }
    }

    return $obj;
}