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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
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**
**
**
****************************************************************************/
//
// 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 <private/qitemtype_p.h>
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".
*/
QString displayName(const NamePool::Ptr &np) const override;
/**
* 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
*/
bool itemMatches(const Item &item) const override;
/**
* 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
*/
bool xdtTypeMatches(const ItemType::Ptr &other) const override;
/**
* @returns @c true if any of the represented types is a node type.
*/
bool isNodeType() const override;
/**
* @returns @c true if any of the represented types is an atomic type.
*/
bool isAtomicType() const override;
/**
* 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.
*/
ItemType::Ptr xdtSuperType() const override;
/**
* 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>.
*/
ItemType::Ptr atomizedType() const override;
private:
const ItemType::List m_types;
const ItemType::List::const_iterator m_end;
};
}
QT_END_NAMESPACE
#endif
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