protected function loadMetaData(AbstractDataProvider $dataProvider, array $dataSubmitters = NULL) {
$dataProvider->startReading();
$columnNames = $this->parseNextRecord($dataProvider, $dataSubmitters);
if ($this->isHeaderPresent) {
$dataProvider->endReading();
if (!isset($columnNames)) {
throw new IllegalStateException(t('Upload operation resulted in error. No data was detected'));
}
}
else {
// we intentionally processed the row to just identify number of columns
$dataProvider->rollbackReading();
// it means the file contains one empty column
if (!isset($columnNames)) {
$columnNames[] = '';
}
}
$providerMetaData = $this->initiateMetaData();
for ($i = 0, $count = count($columnNames); $i < $count; $i++) {
$originalColumnName = $this->isHeaderPresent
? $this->stringDataTypeHandler->castValue($columnNames[$i])
: NULL;
$column = $providerMetaData->initiateColumn();
$column->columnIndex = $i;
$column->persistence = ColumnMetaData::PERSISTENCE__NO_STORAGE;
$column->source = $originalColumnName;
$this->prepareMetaDataColumn($dataSubmitters, $providerMetaData, $column, $originalColumnName);
// adjusting public name if not provided
if (!isset($column->publicName)) {
$column->publicName = $column->name;
}
$providerMetaData->registerColumnInstance($column);
}
// comparing structure with existing meta data
if (isset($this->metadata)) {
// number of columns has to be the same
$existingColumnCount = $this->metadata->getColumnCount(FALSE, TRUE);
$newColumnCount = $providerMetaData->getColumnCount(FALSE);
if ($existingColumnCount !== $newColumnCount) {
LogHelper::log_debug($this->metadata);
LogHelper::log_debug($providerMetaData);
throw new DataParserException(t(
'Loaded structure with %newColumnCount column(s) vs %existingColumnCount in original dataset',
array('%existingColumnCount' => $existingColumnCount, '%newColumnCount' => $newColumnCount)));
}
// if header is present comparing column names
if ($this->isHeaderPresent) {
foreach ($providerMetaData->getColumns(FALSE) as $column) {
$structureMatches = TRUE;
$oldColumn = $this->metadata->findColumnByIndex($column->columnIndex);
if (isset($oldColumn)) {
if (isset($oldColumn->source)) {
$structureMatches = $oldColumn->source == $column->source;
}
else {
// 'source' property is not set. Checking if other columns in the dataset point to the same source
$sourceMoved = FALSE;
foreach ($this->metadata->columns as $c) {
if (isset($c->source) && ($c->source == $column->source)) {
$sourceMoved = TRUE;
break;
}
}
if ($sourceMoved) {
$structureMatches = FALSE;
}
}
}
else {
// for some reason a column with the column index does not exist in old meta data
$structureMatches = FALSE;
}
if (!$structureMatches) {
LogHelper::log_debug($column);
LogHelper::log_debug($oldColumn);
throw new DataParserException(t(
'%datasetColumnName column is inconsistent with %dataColumnName from source of data',
array(
'%datasetColumnName' => $oldColumn->publicName,
'%dataColumnName' => $column->publicName)));
}
}
}
}
else {
$this->metadata = $providerMetaData;
}
}
