src/DataTypeWriterBase.h
author František Kučera <franta-hg@frantovo.cz>
Sat, 21 Jul 2018 17:30:25 +0200
branchv_0
changeset 9 0a40752e401d
parent 5 include/DataTypeWriterBase.h@7fe870c3362f
child 15 8fd6c4d44071
permissions -rw-r--r--
shared library with pure abstract class (interface)

#pragma once

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

namespace relpipe {
namespace writer {

/**
 * This class contains common features that are independent from particular data type (generic/template type)
 */
class DataTypeWriterBase {
private:
	const integer_t typeId;
	const string_t typeCode;
public:

	DataTypeWriterBase(const integer_t typeId, const string_t typeCode) :
	typeId(typeId), typeCode(typeCode) {
	}

	virtual ~DataTypeWriterBase() {
	};

	/**
	 * @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) {
		return dataType == typeId;
	}

	/**
	 * @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) {
		return dataType == typeCode;
	}

	integer_t getTypeId() {
		return typeId;
	}

	string_t getTypeCode() {
		return typeCode;
	}
};

}
}