| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
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| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
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| ** |
| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| #include <QVariant> |
| #include <QStringList> |
| |
| #include "qanyuri_p.h" |
| #include "qatomicstring_p.h" |
| #include "qbuiltintypes_p.h" |
| #include "qcommonsequencetypes_p.h" |
| #include "qgenericsequencetype_p.h" |
| #include "qinteger_p.h" |
| #include "qitem_p.h" |
| #include "qsequencetype_p.h" |
| #include "qvariableloader_p.h" |
| #include "qxmlquery_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QPatternist |
| { |
| |
| class VariantListIterator : public ListIteratorPlatform<QVariant, Item, VariantListIterator> |
| { |
| public: |
| inline VariantListIterator(const QVariantList &list) : ListIteratorPlatform<QVariant, Item, VariantListIterator>(list) |
| { |
| } |
| |
| private: |
| friend class ListIteratorPlatform<QVariant, Item, VariantListIterator>; |
| |
| inline Item inputToOutputItem(const QVariant &inputType) const |
| { |
| return AtomicValue::toXDM(inputType); |
| } |
| }; |
| |
| class StringListIterator : public ListIteratorPlatform<QString, Item, StringListIterator> |
| { |
| public: |
| inline StringListIterator(const QStringList &list) : ListIteratorPlatform<QString, Item, StringListIterator>(list) |
| { |
| } |
| |
| private: |
| friend class ListIteratorPlatform<QString, Item, StringListIterator>; |
| |
| static inline Item inputToOutputItem(const QString &inputType) |
| { |
| return AtomicString::fromValue(inputType); |
| } |
| }; |
| |
| /** |
| * Takes two DynamicContext instances, and redirects the storage of temporary trees |
| * to one of them. |
| * |
| * @since 4.5 |
| */ |
| class TemporaryTreesRedirectingContext : public DelegatingDynamicContext |
| { |
| public: |
| TemporaryTreesRedirectingContext(const DynamicContext::Ptr &other, |
| const DynamicContext::Ptr &modelStorage) : DelegatingDynamicContext(other) |
| , m_modelStorage(modelStorage) |
| { |
| Q_ASSERT(m_modelStorage); |
| } |
| |
| void addNodeModel(const QAbstractXmlNodeModel::Ptr &nodeModel) override |
| { |
| m_modelStorage->addNodeModel(nodeModel); |
| } |
| |
| private: |
| const DynamicContext::Ptr m_modelStorage; |
| }; |
| } |
| |
| using namespace QPatternist; |
| |
| SequenceType::Ptr VariableLoader::announceExternalVariable(const QXmlName name, |
| const SequenceType::Ptr &declaredType) |
| { |
| Q_UNUSED(declaredType); |
| const QVariant &variant = m_bindingHash.value(name); |
| |
| |
| if(variant.isNull()) |
| return SequenceType::Ptr(); |
| else if(variant.userType() == qMetaTypeId<QIODevice *>()) |
| return CommonSequenceTypes::ExactlyOneAnyURI; |
| else if(variant.userType() == qMetaTypeId<QXmlQuery>()) |
| { |
| const QXmlQuery variableQuery(qvariant_cast<QXmlQuery>(variant)); |
| return variableQuery.d->expression()->staticType(); |
| } |
| else |
| { |
| return makeGenericSequenceType(AtomicValue::qtToXDMType(qvariant_cast<QXmlItem>(variant)), |
| Cardinality::exactlyOne()); |
| } |
| } |
| |
| Item::Iterator::Ptr VariableLoader::evaluateSequence(const QXmlName name, |
| const DynamicContext::Ptr &context) |
| { |
| |
| const QVariant &variant = m_bindingHash.value(name); |
| Q_ASSERT_X(!variant.isNull(), Q_FUNC_INFO, |
| "We assume that we have a binding."); |
| |
| /* Same code as in the default clause below. */ |
| if(variant.userType() == qMetaTypeId<QIODevice *>()) |
| return makeSingletonIterator(itemForName(name)); |
| else if(variant.userType() == qMetaTypeId<QXmlQuery>()) |
| { |
| const QXmlQuery variableQuery(qvariant_cast<QXmlQuery>(variant)); |
| |
| return variableQuery.d->expression()->evaluateSequence(DynamicContext::Ptr(new TemporaryTreesRedirectingContext(variableQuery.d->dynamicContext(), context))); |
| } |
| |
| const QVariant v(qvariant_cast<QXmlItem>(variant).toAtomicValue()); |
| |
| switch(v.type()) |
| { |
| case QVariant::StringList: |
| return Item::Iterator::Ptr(new StringListIterator(v.toStringList())); |
| case QVariant::List: |
| return Item::Iterator::Ptr(new VariantListIterator(v.toList())); |
| default: |
| return makeSingletonIterator(itemForName(name)); |
| } |
| } |
| |
| Item VariableLoader::itemForName(const QXmlName &name) const |
| { |
| const QVariant &variant = m_bindingHash.value(name); |
| |
| if(variant.userType() == qMetaTypeId<QIODevice *>()) |
| return Item(AnyURI::fromValue(QLatin1String("tag:trolltech.com,2007:QtXmlPatterns:QIODeviceVariable:") + m_namePool->stringForLocalName(name.localName()))); |
| |
| const QXmlItem item(qvariant_cast<QXmlItem>(variant)); |
| |
| if(item.isNode()) |
| return Item::fromPublic(item); |
| else |
| { |
| const QVariant atomicValue(item.toAtomicValue()); |
| /* If the atomicValue is null it means it doesn't exist in m_bindingHash, and therefore it must |
| * be a QIODevice, since Patternist guarantees to only ask for variables that announceExternalVariable() |
| * has accepted. */ |
| if(atomicValue.isNull()) |
| return Item(AnyURI::fromValue(QLatin1String("tag:trolltech.com,2007:QtXmlPatterns:QIODeviceVariable:") + m_namePool->stringForLocalName(name.localName()))); |
| else |
| return AtomicValue::toXDM(atomicValue); |
| } |
| } |
| |
| Item VariableLoader::evaluateSingleton(const QXmlName name, |
| const DynamicContext::Ptr &) |
| { |
| return itemForName(name); |
| } |
| |
| bool VariableLoader::isSameType(const QVariant &v1, |
| const QVariant &v2) const |
| { |
| /* Are both of type QIODevice *? */ |
| if(v1.userType() == qMetaTypeId<QIODevice *>() && v1.userType() == v2.userType()) |
| return true; |
| |
| /* Ok, we have two QXmlItems. */ |
| const QXmlItem i1(qvariant_cast<QXmlItem>(v1)); |
| const QXmlItem i2(qvariant_cast<QXmlItem>(v2)); |
| |
| if(i1.isNode()) |
| { |
| Q_ASSERT(false); |
| return false; |
| } |
| else if(i2.isAtomicValue()) |
| return i1.toAtomicValue().type() == i2.toAtomicValue().type(); |
| else |
| { |
| /* One is an atomic, the other is a node or they are null. */ |
| return false; |
| } |
| } |
| |
| void VariableLoader::removeBinding(const QXmlName &name) |
| { |
| m_bindingHash.remove(name); |
| } |
| |
| bool VariableLoader::hasBinding(const QXmlName &name) const |
| { |
| return m_bindingHash.contains(name) |
| || (m_previousLoader && m_previousLoader->hasBinding(name)); |
| } |
| |
| QVariant VariableLoader::valueFor(const QXmlName &name) const |
| { |
| if(m_bindingHash.contains(name)) |
| return m_bindingHash.value(name); |
| else if(m_previousLoader) |
| return m_previousLoader->valueFor(name); |
| else |
| return QVariant(); |
| } |
| |
| void VariableLoader::addBinding(const QXmlName &name, |
| const QVariant &value) |
| { |
| m_bindingHash.insert(name, value); |
| } |
| |
| bool VariableLoader::invalidationRequired(const QXmlName &name, |
| const QVariant &variant) const |
| { |
| return hasBinding(name) && !isSameType(valueFor(name), variant); |
| } |
| |
| QT_END_NAMESPACE |
| |