#pragma once

#include <string>
#include "typedefs.h"

namespace relpipe {
namespace reader {

/**
 * 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();
};

}
}