1 /****************************************************************************
3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** No Commercial Usage
11 ** This file contains pre-release code and may not be distributed.
12 ** You may use this file in accordance with the terms and conditions
13 ** contained in the Technology Preview License Agreement accompanying
16 ** GNU Lesser General Public License Usage
17 ** Alternatively, this file may be used under the terms of the GNU Lesser
18 ** General Public License version 2.1 as published by the Free Software
19 ** Foundation and appearing in the file LICENSE.LGPL included in the
20 ** packaging of this file. Please review the following information to
21 ** ensure the GNU Lesser General Public License version 2.1 requirements
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24 ** In addition, as a special exception, Nokia gives you certain additional
25 ** rights. These rights are described in the Nokia Qt LGPL Exception
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
28 ** If you have questions regarding the use of this file, please contact
29 ** Nokia at qt-info@nokia.com.
40 ****************************************************************************/
42 #include "qatomictype_p.h"
43 #include "qbuiltintypes_p.h"
44 #include "qcommonsequencetypes_p.h"
45 #include "qgenericsequencetype_p.h"
46 #include "qsequencemappingiterator_p.h"
48 #include "qatomizer_p.h"
52 using namespace QPatternist;
54 Atomizer::Atomizer(const Expression::Ptr &operand) : SingleContainer(operand)
58 Item::Iterator::Ptr Atomizer::mapToSequence(const Item &item, const DynamicContext::Ptr &) const
60 /* Function & Operators, 2.4.2 fn:data, says "If the node does not have a
61 * typed value an error is raised [err:FOTY0012]."
62 * When does a node not have a typed value? */
64 return item.sequencedTypedValue();
67 Item::Iterator::Ptr Atomizer::evaluateSequence(const DynamicContext::Ptr &context) const
69 return makeSequenceMappingIterator<Item>(ConstPtr(this),
70 m_operand->evaluateSequence(context),
74 Item Atomizer::evaluateSingleton(const DynamicContext::Ptr &context) const
76 const Item item(m_operand->evaluateSingleton(context));
78 if(!item) /* Empty is allowed, cardinality is considered '?' */
81 const Item::Iterator::Ptr it(mapToSequence(item, context));
82 Q_ASSERT_X(it, Q_FUNC_INFO, "A valid QAbstractXmlForwardIterator must always be returned.");
84 Item result(it->next());
85 Q_ASSERT_X(!it->next(), Q_FUNC_INFO,
86 "evaluateSingleton should never be used if the cardinality is two or more");
91 Expression::Ptr Atomizer::typeCheck(const StaticContext::Ptr &context,
92 const SequenceType::Ptr &reqType)
94 /* Compress -- the earlier the better. */
95 if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(m_operand->staticType()->itemType()))
96 return m_operand->typeCheck(context, reqType);
98 return SingleContainer::typeCheck(context, reqType);
101 SequenceType::Ptr Atomizer::staticType() const
103 const SequenceType::Ptr opt(m_operand->staticType());
104 return makeGenericSequenceType(opt->itemType()->atomizedType(),
108 SequenceType::List Atomizer::expectedOperandTypes() const
110 SequenceType::List result;
111 result.append(CommonSequenceTypes::ZeroOrMoreItems);
115 ExpressionVisitorResult::Ptr Atomizer::accept(const ExpressionVisitor::Ptr &visitor) const
117 return visitor->visit(this);
120 const SourceLocationReflection *Atomizer::actualReflection() const
122 return m_operand->actualReflection();