/*
 * Triple.h
 *
 *  Created on: 2014-6-20
 *      Author: liyouhuan
 */

#ifndef _UTIL_TRIPLE_H
#define _UTIL_TRIPLE_H

#include "Util.h"

using namespace std;

class Triple{
public:
	string subject;
	string predicate;
	string object;

	Triple();

	/* _line responds to a triple
	 * It's OK if _line ends up with '.' or not
	 * tuples separated by '\t'
	 *  */
	Triple(string _line);
	Triple(const string& _s, const string& _p, const string& _o);
	Triple(const Triple& _triple);
	Triple& operator=(const Triple& _triple);

	void setSubject(const string& _s);
	void setPredicate(const string& _p);
	void setObject(const string& _o);

	const string& getSubject()const;
	const string& getPredicate()const;
	const string& getObject()const;

	const string toString()const;
};

class TripleWithObjType : public Triple
{
public:
	enum ObjectType {None, Entity, Literal};
	ObjectType object_type;

    TripleWithObjType();
    TripleWithObjType(const string& _s, const string& _p, const string& _o, const ObjectType _o_type = None);
    TripleWithObjType(const TripleWithObjType& _triple_with_objtype);

    TripleWithObjType& operator=(const TripleWithObjType& _triple_with_objtype);

    void setObjType(const ObjectType _o_type);

    bool isObjEntity()const;
    bool isObjLiteral()const;

    const string toString()const;
};

#endif //_UTIL_TRIPLE_H