| /**************************************************************************** |
| ** |
| ** 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 |
| ** Licensees holding valid commercial Qt licenses may use this file in |
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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 |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| // |
| // 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. |
| // |
| |
| /** |
| * @file |
| * @short This file is included by qcastingplatform_p.h. |
| * If you need includes in this file, put them in CasttingPlatform.h, outside of the namespace. |
| */ |
| |
| template <typename TSubClass, const bool issueError> |
| Item CastingPlatform<TSubClass, issueError>::castWithCaster(const Item &sourceValue, |
| const AtomicCaster::Ptr &caster, |
| const ReportContext::Ptr &context) const |
| { |
| Q_ASSERT(sourceValue); |
| Q_ASSERT(caster); |
| Q_ASSERT(context); |
| |
| const Item retval(caster->castFrom(sourceValue, context)); |
| |
| if(issueError) |
| { |
| if(retval.template as<AtomicValue>()->hasError()) |
| { |
| issueCastError(retval, sourceValue, context); |
| return Item(); |
| } |
| else |
| return retval; |
| } |
| else |
| return retval; |
| } |
| |
| template <typename TSubClass, const bool issueError> |
| Item CastingPlatform<TSubClass, issueError>::cast(const Item &sourceValue, |
| const ReportContext::Ptr &context) const |
| { |
| Q_ASSERT(sourceValue); |
| Q_ASSERT(context); |
| Q_ASSERT(targetType()); |
| |
| if(m_caster) |
| return castWithCaster(sourceValue, m_caster, context); |
| else |
| { |
| bool castImpossible = false; |
| const AtomicCaster::Ptr caster(locateCaster(sourceValue.type(), context, castImpossible, static_cast<const TSubClass *>(this), targetType())); |
| |
| if(!issueError && castImpossible) |
| { |
| /* If we're supposed to issue an error(issueError) then this |
| * line will never be reached, because locateCaster() will in |
| * that case throw. */ |
| return ValidationError::createError(); |
| } |
| else |
| return castWithCaster(sourceValue, caster, context); |
| } |
| } |
| |
| template <typename TSubClass, const bool issueError> |
| bool CastingPlatform<TSubClass, issueError>::prepareCasting(const ReportContext::Ptr &context, |
| const ItemType::Ptr &sourceType) |
| { |
| Q_ASSERT(sourceType); |
| Q_ASSERT(context); |
| |
| if(*sourceType == *BuiltinTypes::xsAnyAtomicType || |
| *sourceType == *BuiltinTypes::item || |
| *sourceType == *CommonSequenceTypes::Empty || |
| *sourceType == *BuiltinTypes::numeric) |
| return true; /* The type could not be narrowed better than xs:anyAtomicType |
| or numeric at compile time. We'll do lookup at runtime instead. */ |
| |
| bool castImpossible = false; |
| m_caster = locateCaster(sourceType, context, castImpossible, static_cast<const TSubClass *>(this), targetType()); |
| |
| return !castImpossible; |
| } |
| |
| template <typename TSubClass, const bool issueError> |
| AtomicCaster::Ptr CastingPlatform<TSubClass, issueError>::locateCaster(const ItemType::Ptr &sourceType, |
| const ReportContext::Ptr &context, |
| bool &castImpossible, |
| const SourceLocationReflection *const location, |
| const ItemType::Ptr &targetType) |
| { |
| Q_ASSERT(sourceType); |
| Q_ASSERT(targetType); |
| |
| const AtomicCasterLocator::Ptr locator(static_cast<AtomicType *>( |
| targetType.data())->casterLocator()); |
| if(!locator) |
| { |
| if(issueError) |
| { |
| context->error(QtXmlPatterns::tr("No casting is possible with %1 as the target type.") |
| .arg(formatType(context->namePool(), targetType)), |
| ReportContext::XPTY0004, location); |
| } |
| else |
| castImpossible = true; |
| |
| return AtomicCaster::Ptr(); |
| } |
| |
| const AtomicCaster::Ptr caster(static_cast<const AtomicType *>(sourceType.data())->accept(locator, location)); |
| if(!caster) |
| { |
| if(issueError) |
| { |
| context->error(QtXmlPatterns::tr("It is not possible to cast from %1 to %2.") |
| .arg(formatType(context->namePool(), sourceType)) |
| .arg(formatType(context->namePool(), targetType)), |
| ReportContext::XPTY0004, location); |
| } |
| else |
| castImpossible = true; |
| |
| return AtomicCaster::Ptr(); |
| } |
| |
| return caster; |
| } |
| |
| template <typename TSubClass, const bool issueError> |
| void CastingPlatform<TSubClass, issueError>::checkTargetType(const ReportContext::Ptr &context) const |
| { |
| Q_ASSERT(context); |
| |
| const ItemType::Ptr tType(targetType()); |
| Q_ASSERT(tType); |
| Q_ASSERT(tType->isAtomicType()); |
| const AtomicType::Ptr asAtomic(tType); |
| |
| /* This catches casting to xs:NOTATION and xs:anyAtomicType. */ |
| if(asAtomic->isAbstract()) |
| { |
| context->error(QtXmlPatterns::tr("Casting to %1 is not possible because it " |
| "is an abstract type, and can therefore never be instantiated.") |
| .arg(formatType(context->namePool(), tType)), |
| ReportContext::XPST0080, |
| static_cast<const TSubClass*>(this)); |
| } |
| } |
| |
| template <typename TSubClass, const bool issueError> |
| void CastingPlatform<TSubClass, issueError>::issueCastError(const Item &validationError, |
| const Item &sourceValue, |
| const ReportContext::Ptr &context) const |
| { |
| Q_ASSERT(validationError); |
| Q_ASSERT(context); |
| Q_ASSERT(validationError.isAtomicValue()); |
| Q_ASSERT(validationError.template as<AtomicValue>()->hasError()); |
| |
| const ValidationError::Ptr err(validationError.template as<ValidationError>()); |
| QString msg(err->message()); |
| |
| if(msg.isNull()) |
| { |
| msg = QtXmlPatterns::tr("It's not possible to cast the value %1 of type %2 to %3") |
| .arg(formatData(sourceValue.stringValue())) |
| .arg(formatType(context->namePool(), sourceValue.type())) |
| .arg(formatType(context->namePool(), targetType())); |
| } |
| else |
| { |
| Q_ASSERT(!msg.isEmpty()); |
| msg = QtXmlPatterns::tr("Failure when casting from %1 to %2: %3") |
| .arg(formatType(context->namePool(), sourceValue.type())) |
| .arg(formatType(context->namePool(), targetType())) |
| .arg(msg); |
| } |
| |
| /* If m_errorCode is FORG0001, we assume our sub-classer doesn't have a |
| * special wish about error code, so then we use the error object's code. |
| */ |
| context->error(msg, m_errorCode == ReportContext::FORG0001 ? err->errorCode() : m_errorCode, |
| static_cast<const TSubClass*>(this)); |
| } |
| |