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Diffstat (limited to 'src/xmlpatterns/expr/qreturnorderby.cpp')
| -rw-r--r-- | src/xmlpatterns/expr/qreturnorderby.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qreturnorderby.cpp b/src/xmlpatterns/expr/qreturnorderby.cpp new file mode 100644 index 0000000000..9c3ee82054 --- /dev/null +++ b/src/xmlpatterns/expr/qreturnorderby.cpp @@ -0,0 +1,133 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qcommonsequencetypes_p.h" +#include "qexpressionsequence_p.h" +#include "qsorttuple_p.h" + +#include "qreturnorderby_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +ReturnOrderBy::ReturnOrderBy(const OrderBy::Stability aStability, + const OrderBy::OrderSpec::Vector &oSpecs, + const Expression::List &ops) : UnlimitedContainer(ops) + , m_stability(aStability) + , m_orderSpecs(oSpecs) + , m_flyAway(true) +{ + Q_ASSERT_X(m_operands.size() >= 2, Q_FUNC_INFO, + "ReturnOrderBy must have the return expression, and at least one sort key."); + Q_ASSERT(m_orderSpecs.size() == ops.size() - 1); +} + +Item ReturnOrderBy::evaluateSingleton(const DynamicContext::Ptr &context) const +{ + Q_ASSERT(m_operands.size() > 1); + const Item::Iterator::Ptr value(makeListIterator(m_operands.first()->evaluateSequence(context)->toList())); + Item::Vector sortKeys; + + /* We're skipping the first operand. */ + const int len = m_operands.size() - 1; + sortKeys.resize(len); + + for(int i = 1; i <= len; ++i) + sortKeys[i - 1] = m_operands.at(i)->evaluateSingleton(context); + + return Item(new SortTuple(value, sortKeys)); +} + +bool ReturnOrderBy::evaluateEBV(const DynamicContext::Ptr &context) const +{ + // TODO This is temporary code. + return m_operands.first()->evaluateEBV(context); +} + +Expression::Ptr ReturnOrderBy::compress(const StaticContext::Ptr &context) +{ + /* We first did this in typeCheck(), but that broke due to that type checks were + * missed, which other pieces relied on. */ + if(m_flyAway) + { + /* We only want the return expression, not the sort keys. */ + return m_operands.first()->compress(context); + } + else + { + /* We don't need the members, so don't keep a reference to them. */ + m_orderSpecs.clear(); + + return UnlimitedContainer::compress(context); + } +} + +Expression::Properties ReturnOrderBy::properties() const +{ + /* For some unknown reason this is necessary for XQTS test case orderBy18. */ + return DisableElimination; +} + +ExpressionVisitorResult::Ptr ReturnOrderBy::accept(const ExpressionVisitor::Ptr &visitor) const +{ + return visitor->visit(this); +} + +SequenceType::Ptr ReturnOrderBy::staticType() const +{ + return m_operands.first()->staticType(); +} + +SequenceType::List ReturnOrderBy::expectedOperandTypes() const +{ + SequenceType::List result; + result.append(CommonSequenceTypes::ZeroOrMoreItems); + result.append(CommonSequenceTypes::ZeroOrOneAtomicType); + return result; +} + +Expression::ID ReturnOrderBy::id() const +{ + return IDReturnOrderBy; +} + +QT_END_NAMESPACE |