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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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcommonsequencetypes_p.h"
#include "qdelegatingnamespaceresolver_p.h"
#include "qnamespaceconstructor_p.h"
#include "qnodebuilder_p.h"
#include "qoutputvalidator_p.h"
#include "qqnamevalue_p.h"
#include "qstaticnamespacecontext_p.h"
#include "qelementconstructor_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
ElementConstructor::ElementConstructor(const Expression::Ptr &op1,
const Expression::Ptr &op2,
const bool isXSLT) : PairContainer(op1, op2)
, m_isXSLT(isXSLT)
{
}
Item ElementConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const
{
const Item name(m_operand1->evaluateSingleton(context));
const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(m_staticBaseURI));
OutputValidator validator(nodeBuilder.data(), context, this, m_isXSLT);
const DynamicContext::Ptr receiverContext(context->createReceiverContext(&validator));
nodeBuilder->startElement(name.as<QNameValue>()->qName());
m_operand2->evaluateToSequenceReceiver(receiverContext);
nodeBuilder->endElement();
const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument());
context->addNodeModel(nm);
return nm->root(QXmlNodeModelIndex());
}
void ElementConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
{
/* We create an OutputValidator here too. If we're serializing(a common
* case, unfortunately) the receiver is already validating in order to
* catch cases where a computed attribute constructor is followed by an
* element constructor, but in the cases where we're not serializing it's
* necessary that we validate in this step. */
const Item name(m_operand1->evaluateSingleton(context));
QAbstractXmlReceiver *const receiver = context->outputReceiver();
OutputValidator validator(receiver, context, this, m_isXSLT);
const DynamicContext::Ptr receiverContext(context->createReceiverContext(&validator));
receiver->startElement(name.as<QNameValue>()->qName());
m_operand2->evaluateToSequenceReceiver(receiverContext);
receiver->endElement();
}
Expression::Ptr ElementConstructor::typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType)
{
/* What does this code do? When type checking our children, our namespace
* bindings, which are also children of the form of NamespaceConstructor
* instances, must be statically in-scope for them, so find them and
* shuffle their bindings into the StaticContext. */
m_staticBaseURI = context->baseURI();
/* Namespace declarations changes the in-scope bindings, so let's
* first lookup our child NamespaceConstructors. */
const ID operandID = m_operand2->id();
NamespaceResolver::Bindings overrides;
if(operandID == IDExpressionSequence)
{
const Expression::List operands(m_operand2->operands());
const int len = operands.count();
for(int i = 0; i < len; ++i)
{
if(operands.at(i)->is(IDNamespaceConstructor))
{
const QXmlName &nb = operands.at(i)->as<NamespaceConstructor>()->namespaceBinding();
overrides.insert(nb.prefix(), nb.namespaceURI());
}
}
}
const NamespaceResolver::Ptr newResolver(new DelegatingNamespaceResolver(context->namespaceBindings(), overrides));
const StaticContext::Ptr augmented(new StaticNamespaceContext(newResolver, context));
return PairContainer::typeCheck(augmented, reqType);
}
SequenceType::Ptr ElementConstructor::staticType() const
{
return CommonSequenceTypes::ExactlyOneElement;
}
SequenceType::List ElementConstructor::expectedOperandTypes() const
{
SequenceType::List result;
result.append(CommonSequenceTypes::ExactlyOneQName);
result.append(CommonSequenceTypes::ZeroOrMoreItems);
return result;
}
Expression::Properties ElementConstructor::properties() const
{
return DisableElimination | IsNodeConstructor;
}
ExpressionVisitorResult::Ptr
ElementConstructor::accept(const ExpressionVisitor::Ptr &visitor) const
{
return visitor->visit(this);
}
QT_END_NAMESPACE
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