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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_QNameConstructor_H
#define Patternist_QNameConstructor_H
#include "qsinglecontainer_p.h"
#include "qbuiltintypes_p.h"
#include "qpatternistlocale_p.h"
#include "qxpathhelper_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Creates an @c xs:QName value from a lexical QName using
* statically known namespace bindings.
*
* @see QQNameValue
* @see QXmlUtils
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class QNameConstructor : public SingleContainer
{
public:
QNameConstructor(const Expression::Ptr &source,
const NamespaceResolver::Ptr &nsResolver);
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
virtual SequenceType::List expectedOperandTypes() const;
virtual SequenceType::Ptr staticType() const;
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
/**
* Expands @p lexicalQName, which is a lexical representation of a QName such as "x:body", into
* a QName using @p nsResolver to supply the namespace bindings.
*
* If @p lexicalQName is lexically invalid @p InvalidQName is raised via @p context, or if
* no namespace binding does not exists for a prefix(if any) in @p lexicalQName, @p NoBinding
* is raised via @p context.
*
* If @p asForAttribute is @c true, the name is considered to be for an
* attribute in some way, and @p lexicalQName will not pick up the
* default namespace if it doesn't have a prefix.
*
* @p nsResolver is parameterized meaning the function can be instantiated with either
* DynamicContext or StaticContext.
*
* @see QQNameValue
* @see QXmlUtils
*/
template<typename TReportContext,
const ReportContext::ErrorCode InvalidQName,
const ReportContext::ErrorCode NoBinding>
static
QXmlName expandQName(const QString &lexicalQName,
const TReportContext &context,
const NamespaceResolver::Ptr &nsResolver,
const SourceLocationReflection *const r,
const bool asForAttribute = false);
/**
* Resolves the namespace prefix @p prefix to its namespace if it exists, or
* raised ReportContext::XPST0081 otherwise.
*
* @returns the namespace URI corresponding to @p prefix
*/
static QXmlName::NamespaceCode namespaceForPrefix(const QXmlName::PrefixCode prefix,
const StaticContext::Ptr &context,
const SourceLocationReflection *const r);
virtual const SourceLocationReflection *actualReflection() const;
private:
const NamespaceResolver::Ptr m_nsResolver;
};
template<typename TReportContext,
const ReportContext::ErrorCode InvalidQName,
const ReportContext::ErrorCode NoBinding>
QXmlName QNameConstructor::expandQName(const QString &lexicalQName,
const TReportContext &context,
const NamespaceResolver::Ptr &nsResolver,
const SourceLocationReflection *const r,
const bool asForAttribute)
{
Q_ASSERT(nsResolver);
Q_ASSERT(context);
if(XPathHelper::isQName(lexicalQName))
{
QString prefix;
QString local;
XPathHelper::splitQName(lexicalQName, prefix, local);
const QXmlName::NamespaceCode nsCode = asForAttribute && prefix.isEmpty() ? QXmlName::NamespaceCode(StandardNamespaces::empty)
: (nsResolver->lookupNamespaceURI(context->namePool()->allocatePrefix(prefix)));
if(nsCode == NamespaceResolver::NoBinding)
{
context->error(QtXmlPatterns::tr("No namespace binding exists for "
"the prefix %1 in %2").arg(formatKeyword(prefix),
formatKeyword(lexicalQName)),
NoBinding,
r);
return QXmlName(); /* Silence compiler warning. */
}
else
return context->namePool()->allocateQName(context->namePool()->stringForNamespace(nsCode), local, prefix);
}
else
{
context->error(QtXmlPatterns::tr("%1 is an invalid %2")
.arg(formatData(lexicalQName))
.arg(formatType(context->namePool(), BuiltinTypes::xsQName)),
InvalidQName,
r);
return QXmlName(); /* Silence compiler warning. */
}
}
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
