public static function getInstance()
{
if (!isset(self::$factory)) {
self::$factory = new DefaultDatasetSourceAssemblerFactory();
}
return self::$factory;
}
public function assemble(AbstractSQLDataSourceQueryHandler $datasourceHandler, AbstractQueryRequest $request, DatasetMetaData $dataset, array $columnNames = NULL) {
$assemblerName = $this->getAssemblerName($dataset);
$assemblerConfiguration = $dataset->configuration;
$assembler = DatasetSourceAssemblerFactory::getInstance()->getHandler($assemblerName, $assemblerConfiguration);
$statement = $assembler->assemble($datasourceHandler, $request, $dataset, $columnNames);
return $statement;
}
public function assembleDatasetSourceStatement(DataControllerCallContext $callcontext, DatasetMetaData $dataset, array $columnNames = NULL)
{
$datasetSourceType = DatasetTypeHelper::detectDatasetSourceType($dataset);
switch ($datasetSourceType) {
case DatasetTypeHelper::DATASET_SOURCE_TYPE__TABLE:
$statement = new Statement();
$table = new DatasetSection($dataset);
if (isset($columnNames)) {
foreach ($columnNames as $columnName) {
$table->columns[] = new ColumnSection($columnName);
}
}
$statement->tables[] = $table;
break;
case DatasetTypeHelper::DATASET_SOURCE_TYPE__SUBQUERY:
// FIXME Statement::assemble should indirectly resolve the issue
$TABLE_ALIAS__SUBQUERY = 'b';
$statement = new Statement();
// FIXME do not duplicate code
$table = new SubquerySection($dataset->source, $TABLE_ALIAS__SUBQUERY);
if (isset($columnNames)) {
foreach ($columnNames as $columnName) {
$table->columns[] = new ColumnSection($columnName);
}
}
$statement->tables[] = $table;
break;
case DatasetTypeHelper::DATASET_SOURCE_TYPE__DYNAMIC:
$assembler = $dataset->assembler;
$handler = DatasetSourceAssemblerFactory::getInstance()->getHandler($assembler->type, isset($assembler->config) ? $assembler->config : NULL);
$statement = $handler->assemble($this, $callcontext, $dataset, $columnNames);
break;
default:
throw new IllegalStateException(t('Unsupported dataset source type: @datasetSourceType', array('@datasetSourceType' => $datasetSourceType)));
}
if (!isset($statement)) {
throw new IllegalStateException(t('Could not prepare source statement for the dataset: @datasetName', array('@datasetName' => $dataset->publicName)));
}
return $statement;
}
public function __construct() {
parent::__construct();
$this->handlerConfigurations = module_invoke_all('dp_dataset_assembler');
}
