/daten/ahuesgen/projects/vhist/code/vhistlib/include/vhistfindlib/returnvalue.h

/* $HEADERS
 $Id: returnvalue.h 2168 2011-05-30 09:09:54Z ahuesgen $
 */

#ifndef RETURNVALUE_H
#define RETURNVALUE_H

#include "../shared/misc_defines.h"

#include <QString>
#include <QDateTime>

namespace vhist
{

enum ReturnValueType
{
    RETURN_VALUE_BOOL,
    RETURN_VALUE_STRING,
    RETURN_VALUE_NOT_MATCHED,
    RETURN_VALUE_INVALID_TYPE,
    RETURN_VALUE_INVALID_OPERATOR,
    RETURN_VALUE_UNKNOWN_TOKEN_TYPE,
    RETURN_VALUE_NOT_ASSIGNED_YET
};


class ReturnValue
{
public:
    ReturnValue(ReturnValueType t, QString v);

public:
    bool isNumber() const;
    bool isDate() const;
    bool isString() const;
    bool isBool() const;
    bool isValid() const;
    bool isUnassignedVariable() const;
    
    QDateTime toDate(bool* success = NULL) const;
    float toNumber(bool* success = NULL) const;
    QString toString(bool* success = NULL) const;
    bool toBool(bool* success = NULL) const;

public:
    static ReturnValue fromString(const QString string);
    static ReturnValue fromBool(bool boolean);
    static ReturnValue fromNumber(float number);

public:
    bool operator ==(const ReturnValue& rhs);

private:
    ReturnValueType m_type;
    QString m_value;
};

}

#endif // RETURNVALUE_H