/**
* Returns an array of instanced subclass of PCModelObject according to $name
* @param PCMapper $mapper a subclass of PCMapper
* @param array $keys a key value array of elements for filtering search in database
* @param array $optionalAttributes an array of strings containing the names of the optional fields to fetch
* @param boolean $useCache if use the cache or not
* @param string $limit the sql query limit
* @param string $order the order specification
* @return array an array of instanced subclass of PCModelObject according to $name
*/
public static function fetchModelObjectInstances($mapper, $keys, $optionalAttributes = null, $useCache = false, $limit = null, $order = NULL)
{
/* if(empty($keys)){
throw new Exception("Illegal argument, \"keys\" is empty");
} */
if ($mapper == null) {
throw new Exception("Mapper must not be null");
}
$required_field = $mapper->getRequiredAttributes();
if ($useCache && isset($keys['identifier'])) {
$identifier = $keys['identifier'];
$cache = PCCache::cacheProvider();
//error_log("GETTING : " . $mapper->getCacheKey($keys));
$item = $cache->getItem($mapper->getCacheKey($keys));
if (isset($item) && $item !== FALSE) {
//error_log("GETTED : " . $mapper->getCacheKey($keys));
return $item;
}
}
$fields = NULL;
//unisco parametri opzionali (se presenti) a parametri richiesti
if ($optionalAttributes == null) {
$fields = $required_field;
} else {
$fields = array_merge($optionalAttributes, $required_field);
}
//creo stringa da parametri separati da virgola
$fields_string = implode(",", $fields);
$table_name = $mapper->getTableName();
$select_stm = "SELECT " . $fields_string . " FROM " . $table_name . " WHERE ";
$prepared_keys_array = array();
$count = 0;
$tot = count($keys);
foreach ($keys as $key => $value) {
$count++;
$placeHolder = ":{$key}";
$select_stm .= $count == $tot ? " {$key} = {$placeHolder} " : " {$key} = {$placeHolder} AND ";
$prepared_keys_array[$placeHolder] = $value;
}
if ($tot == NULL) {
$select_stm .= " TRUE";
}
if (isset($order)) {
$select_stm .= ' ORDER BY ' . $order;
}
if (isset($limit)) {
$select_stm .= ' LIMIT ' . $limit;
}
$pdo = PCDatabase::getSharedDatabaseConnection();
$prepared = $pdo->prepare($select_stm);
if ($prepared->execute($prepared_keys_array) == FALSE) {
$message = "Errore database: (" . $prepared->errorCode() . ") " . $prepared->errorInfo()[1] . " " . $prepared->errorInfo()[2];
throw new Exception($message);
}
$result = null;
$toReturn = array();
while (($result = $prepared->fetch(PDO::FETCH_ASSOC)) != NULL) {
$toReturn[] = $mapper->getMappedInstance($result);
}
if ($useCache && count($toReturn) == 1) {
$identifier = $keys['identifier'];
//error_log("STORING: " . $mapper->getCacheKey($keys));
PCCache::cacheProvider()->setItem($toReturn, $mapper->getCacheKey($keys), 300);
}
$prepared = NULL;
return $toReturn;
}
/**
*
* @param PCMapper $mapper
* @param PCDatabaseQueryCondition $condition
* @param PCDatabaseQueryLimit $limit
* @param PCDatabaseQueryOrder $oder
*/
public static function withMapper($mapper, $condition = NULL, $limit = NULL, $order = NULL)
{
return new PCDatabaseSelectQuery($mapper->getTableName(), $mapper->getRequiredAttributes(), $condition, $limit, $order);
}