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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef Patternist_MultiItemType_H
#define Patternist_MultiItemType_H
#include <QList>
#include "qitemtype_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Represents multiple types such as <tt>document()</tt> @em or <tt>xs:integer</tt>.
*
* In some situations two or more different types are allowed. For example, XQuery's
* @c validate expression accepts document or element nodes(but not attribute
* nodes, for example). MultiItemType is useful in such situations, its constructor
* takes a list of ItemType instances which its member functions treats as a wholeness.
*
* For example, xdtTypeMatches() returns @c true if any of the represented types matches.
*
* @ingroup Patternist_types
* @author Frans Englich <frans.englich@nokia.com>
*/
class MultiItemType : public ItemType
{
public:
/**
* Creates a MultiItemType representing the types in @p typeList. @p typeList must
* contain two or more types.
*/
MultiItemType(const ItemType::List &typeList);
/**
* The display name are the names concatenated with "|" as separator. For example,
* if this MultiItemType represents the types <tt>document()</tt>, <tt>xs:integer</tt>,
* and <tt>xs:anyAtomicType</tt>, the display name is
* "document() | xs:integer | xs:anyAtomicType".
*/
virtual QString displayName(const NamePool::Ptr &np) const;
/**
* If any of the types this MultiItemType represents matches @p item, it is
* considered a match.
*
* @returns @c true if any of the housed ItemType instances matches @p item, otherwise @c false
*/
virtual bool itemMatches(const Item &item) const;
/**
* If any of the types this MultiItemType represents matches @p other, it is
* considered a match.
*
* @returns @c true if any of the housed ItemType instances matches @p other, otherwise @c false
*/
virtual bool xdtTypeMatches(const ItemType::Ptr &other) const;
/**
* @returns @c true if any of the represented types is a node type.
*/
virtual bool isNodeType() const;
/**
* @returns @c true if any of the represented types is an atomic type.
*/
virtual bool isAtomicType() const;
/**
* Determines the union type of all the represented types super types. For example,
* if the represented types are <tt>xs:integer</tt>, <tt>document()</tt>
* and <tt>xs:string</tt>, <tt>item()</tt> is returned.
*/
virtual ItemType::Ptr xdtSuperType() const;
/**
* Determines the union type of all the represented types atomized types. For example,
* if the represented types are <tt>xs:integer</tt> and <tt>document()</tt>,
* <tt>xs:anyAtomicType</tt> is returned, because that's the super type of <tt>xs:integer</tt>
* and <tt>xs:untypedAtomic</tt>.
*/
virtual ItemType::Ptr atomizedType() const;
private:
const ItemType::List m_types;
const ItemType::List::const_iterator m_end;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
