public function next()
{
$this->currentBatch->next();
$this->next = $this->currentBatch->current();
if (null === $this->next && $this->currentBatchSize >= $this->batchSize) {
$entries = $this->fetchBatch($this->scn + 1);
$this->currentBatchSize = count($entries);
$this->currentBatch = new \ArrayIterator($entries);
if ($this->currentBatch->valid()) {
$this->next = $this->currentBatch->current();
$this->scn = $this->next->getScn();
}
}
}
/**
* @return string
*/
private function buildWhereClause()
{
if (null === $this->lastItem && empty($this->whereClause)) {
return '';
}
$query = "WHERE ";
if (null !== $this->lastItem) {
$query .= "((e.timestamp > :timestamp) OR (e.timestamp = :timestamp AND e.scn > :scn) " . " OR (e.timestamp = :timestamp AND e.scn = :scn AND e.aggregateIdentifier > :aggregateIdentifier))";
$this->parameters[':timestamp'] = $this->lastItem->getTimestamp();
$this->parameters[':scn'] = $this->lastItem->getScn();
$this->parameters[':aggregateIdentifier'] = $this->lastItem->getAggregateIdentifier();
}
if (null !== $this->whereClause && strlen($this->whereClause) > 0) {
if (null !== $this->lastItem) {
$query .= " AND (";
}
$query .= $this->whereClause;
if (null !== $this->lastItem) {
$query .= ")";
}
}
return $query;
}