qsqlfield.h

奇趣公司比较新的qt/emd版本

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#ifndef QSQLFIELD_H
#define QSQLFIELD_H

#include <QtCore/qvariant.h>
#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_MODULE(Sql)

class QSqlFieldPrivate;

class Q_SQL_EXPORT QSqlField
{
public:
    enum RequiredStatus { Unknown = -1, Optional = 0, Required = 1 };

    QSqlField(const QString& fieldName = QString(),
              QVariant::Type type = QVariant::Invalid);

    QSqlField(const QSqlField& other);
    QSqlField& operator=(const QSqlField& other);
    bool operator==(const QSqlField& other) const;
    inline bool operator!=(const QSqlField &other) const { return !operator==(other); }
    ~QSqlField();

    void setValue(const QVariant& value);
    inline QVariant value() const
    { return val; }
    void setName(const QString& name);
    QString name() const;
    bool isNull() const;
    void setReadOnly(bool readOnly);
    bool isReadOnly() const;
    void clear();
    QVariant::Type type() const;
    bool isAutoValue() const;

    void setType(QVariant::Type type);
    void setRequiredStatus(RequiredStatus status);
    inline void setRequired(bool required)
    { setRequiredStatus(required ? Required : Optional); }
    void setLength(int fieldLength);
    void setPrecision(int precision);
    void setDefaultValue(const QVariant &value);
    void setSqlType(int type);
    void setGenerated(bool gen);
    void setAutoValue(bool autoVal);

    RequiredStatus requiredStatus() const;
    int length() const;
    int precision() const;
    QVariant defaultValue() const;
    int typeID() const;
    bool isGenerated() const;
    bool isValid() const;

#ifdef QT3_SUPPORT
    inline QT3_SUPPORT void setNull() { clear(); }
#endif

private:
    void detach();
    QVariant val;
    QSqlFieldPrivate* d;
};

#ifndef QT_NO_DEBUG_STREAM
Q_SQL_EXPORT QDebug operator<<(QDebug, const QSqlField &);
#endif

QT_END_HEADER

#endif // QSQLFIELD_H