text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the QtSql module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 2.1 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef QSQLFIELD_H
  #define QSQLFIELD_H
  
  #include <QtCore/qvariant.h>
  #include <QtCore/qstring.h>
  #include <QtSql/qsql.h>
  
  QT_BEGIN_NAMESPACE
  
  
  class QSqlFieldPrivate;
  
  class Q_SQL_EXPORT QSqlField
  {
  public:
      enum RequiredStatus { Unknown = -1, Optional = 0, Required = 1 };
  
      explicit 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;
  
  private:
      void detach();
      QVariant val;
      QSqlFieldPrivate* d;
  };
  
  #ifndef QT_NO_DEBUG_STREAM
  Q_SQL_EXPORT QDebug operator<<(QDebug, const QSqlField &);
  #endif
  
  QT_END_NAMESPACE
  
  #endif // QSQLFIELD_H
  