<?php
namespace DDDBL;
$objQueue = Singleton::getInstance('\\DDDBL\\Queue');
#############################
### db-connection handler ###
#############################
# get (or first establish) connection to database
# and store the DataObject of the connection in the Queue-State
$cloStoreDBConnection = function (\DDDBL\Queue $objQueue, array $arrParameter) {
if (!isConnected()) {
connect();
}
$objQueue->getState()->update(array('DB' => getDBDataObject()));
};
$objQueue->addHandler(QUEUE_GET_DB_CONNECTION_POSITION, $cloStoreDBConnection);
###############################
### query-definition-loader ###
###############################
# get the DataObject of the query and store it in the queue
$cloGetQuery = function (\DDDBL\Queue $objQueue, array $arrParameter) {
$objDataObjectPool = new DataObjectPool('Query-Definition');
# get the first entry of the parameter-list; this is the query-alias
$strAlias = array_shift($arrParameter);
if (empty($strAlias) || !is_string($strAlias)) {
throw new \Exception('no query-alias defined!');
}
if (!$objDataObjectPool->exists($strAlias)) {
throw new \Exception("given query alias is unknown: {$strAlias}");
}
/**
* @throws UnexpectedParameterTypeException - if the given parameter is not a string
*
* @returns (boolean) false, if no connection is established
*
* check if a connection to the database is established. if so,
* the given parameter is used, as method to call at the
* PDO object. the result of the call is returned
*
**/
function mapMethod($strMethod)
{
if (!is_string($strMethod)) {
throw new UnexpectedParameterTypeException('string', $strMethod);
}
if (!isConnected()) {
return false;
}
$objDB = getDBDataObject();
$objPDO = $objDB->get('PDO');
return $objPDO->{$strMethod}();
}
