#pragma once

#include <string>

#include "typedefs.h"

namespace relpipe {

/**

 * This class contains common features that are independent from particular data type (generic/template type)

 */

class DataTypeReaderBase {

private:

	const integer_t typeId;

	const string_t typeCode;

public:

	DataTypeReaderBase(const integer_t typeId, const string_t typeCode) :

	typeId(typeId), typeCode(typeCode) {

	}

	virtual ~DataTypeReaderBase() {

	};

	/**

	 * @param input input stream, should be at position where the value is to be read; the stream will not be closed afred reading

	 * @return read value in form of the string representation of given data type.

	 * E.g. integer 123 is returned as a character string "123",

	 * boolean true is returned as a character string "true".

	 * See Relational pipes format specification for details.

	 */

	virtual string_t readString(std::istream &input) = 0;

	/**

	 * @param output output stream, should be at position where the value is to be written; the stream will not be closed not flushed after writing

	 * @param stringValue write value as given data type (e.g. integer or boolean); stringValue parameter contains given value in string representation of given data type

	 * E.g. integer 123 is passed as a character string "123"

	 * boolean true is passed as a character string "true".

	 * See Relational pipes format specification for details.

	 */

	virtual void writeString(std::ostream& output, const string_t &stringValue) = 0;

	/**

	 * @param dataType data type code as defined in DDP L0

	 * @return whether this class supports conversions of this type

	 */

	virtual bool supports(const integer_t &dataType);

	/**

	 * @param dataType data type name as defined in DDP L0

	 * @return whether this class supports conversions of this type

	 */

	virtual bool supports(const string_t &dataType);

	integer_t getTypeId();

	string_t getTypeCode();

};

}

}