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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 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_AbstractFunctionFactory_H
#define Patternist_AbstractFunctionFactory_H
#include "qcommonnamespaces_p.h"
#include "qfunctionfactory_p.h"
#include "qfunctionsignature_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Supplies convenience code for the function factories.
*
* @ingroup Patternist_functions
* @see XPath10CoreFunctions
* @see XPath20CoreFunctions
* @see XSLT10CoreFunctions
* @author Vincent Ricard <magic@magicninja.org>
*/
class AbstractFunctionFactory : public FunctionFactory
{
public:
virtual Expression::Ptr createFunctionCall(const QXmlName name,
const Expression::List &arguments,
const StaticContext::Ptr &context,
const SourceLocationReflection *const r);
virtual FunctionSignature::Hash functionSignatures() const;
protected:
/**
* This function is responsible for creating the actual Expression, corresponding
* to @p localName and the function signature @p sign. It is called by
* createFunctionCall(), once it have been determined the function actually
* exists and have the correct arity.
*
* This function will only be called for names in the @c fn namespace.
*/
virtual Expression::Ptr retrieveExpression(const QXmlName name,
const Expression::List &args,
const FunctionSignature::Ptr &sign) const = 0;
inline
FunctionSignature::Ptr addFunction(const QXmlName::LocalNameCode localName,
const FunctionSignature::Arity minArgs,
const FunctionSignature::Arity maxArgs,
const SequenceType::Ptr &returnType,
const Expression::Properties props)
{
return addFunction(localName,
minArgs,
maxArgs,
returnType,
Expression::IDIgnorableExpression,
props);
}
FunctionSignature::Ptr addFunction(const QXmlName::LocalNameCode &localName,
const FunctionSignature::Arity minArgs,
const FunctionSignature::Arity maxArgs,
const SequenceType::Ptr &returnType,
const Expression::ID id = Expression::IDIgnorableExpression,
const Expression::Properties props = Expression::Properties(),
const StandardNamespaces::ID ns = StandardNamespaces::fn)
{
const QXmlName name(ns, localName);
const FunctionSignature::Ptr s(new FunctionSignature(name, minArgs, maxArgs,
returnType, props, id));
m_signatures.insert(name, s);
return s;
}
static inline QXmlName::LocalNameCode argument(const NamePool::Ptr &np, const char *const name)
{
return np->allocateLocalName(QLatin1String(name));
}
FunctionSignature::Hash m_signatures;
private:
/**
* @short Determines whether @p arity is a valid number of
* arguments for the function with signature @p sign.
*
* If it is not, a static error with error code ReportContext::XPST0017
* is issued via @p context.
*/
void verifyArity(const FunctionSignature::Ptr &sign,
const StaticContext::Ptr &context,
const xsInteger arity,
const SourceLocationReflection *const r) const;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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