1 files changed, 40 insertions, 0 deletions
diff --git a/project2/common/commonObjects.h b/project2/common/commonObjects.h
new file mode 100644
index 0000000..dae563a
--- /dev/null
+++ b/project2/common/commonObjects.h
@@ -0,0 +1,40 @@
+#ifndef COMMONOBJECTS_H
+#define COMMONOBJECTS_H
+
+#include "dataSource.h"
+#include "rowSet.h"
+#include "xmlStorage.h"
+
+class CommonObjects : public virtual IntrusivePtrBase {
+	public:
+		typedef STORAGEOF(RowSet) RowSets;
+		typedef STORAGEOF(DataSource) DataSources;
+
+		SimpleMessageException(DataSourceNotFound);
+		SimpleMessageException(DataSourceNotCompatible);
+
+		virtual ~CommonObjects();
+
+		RowSetPtr getSource(const std::string &) const;
+		template <class DataSourceType>
+		const DataSourceType * dataSource(const std::string & name) const
+		{
+			DataSources::const_iterator i = datasources.find(name);
+			if (i == datasources.end()) {
+				i = loadDataSource(name);
+			}
+			const DataSourceType * s = boost::dynamic_pointer_cast<const DataSourceType>(i->second).get();
+			if (!s) {
+				throw DataSourceNotCompatible(name);
+			}
+			return s;
+		}
+	protected:
+		RowSets rowSets;
+		mutable DataSources datasources;
+	private:
+		DataSources::const_iterator loadDataSource(const std::string & name) const;
+};
+
+#endif
+