add JSONFormatter

Data/include/Poco/Data/JSONFormatter.h

@@ -0,0 +1,62 @@
+//
+// JSONFormatter.h
+//
+// $Id: //poco/Main/Data/include/Poco/Data/JSONFormatter.h#9 $
+//
+// Library: Data
+// Package: DataCore
+// Module:  JSONFormatter
+//
+// Definition of the JSONFormatter class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Data_JSONFormatter_INCLUDED
+#define Data_JSONFormatter_INCLUDED
+
+
+#include "Poco/Data/RowFormatter.h"
+
+
+namespace Poco {
+namespace Data {
+
+
+class Data_API JSONFormatter: public Poco::Data::RowFormatter
+	/// Class for JSON formatting of data rows.
+{
+public:	
+	JSONFormatter();
+		/// Creates a new JSONFormatter.
+
+	~JSONFormatter();
+		/// Destroy the JSONFormatter.
+
+	std::string& formatNames(const NameVecPtr pNames, std::string& formattedNames);
+	std::string& formatValues(const ValueVec& vals, std::string& formattedValues);
+	
+private:
+	NameVecPtr _pNames;
+	int        _rowCounter;
+};
+
+
+//
+// inlines
+//
+inline std::string& JSONFormatter::formatNames(const NameVecPtr pNames, std::string& formattedNames)
+{
+	// names are used in formatValues
+	if (pNames && !_pNames) _pNames = pNames;
+	return formattedNames = "";
+}
+
+} } // namespace Poco::Data
+
+
+#endif // Data_JSONFormatter_INCLUDED