--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/expr/qcastingplatform.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,221 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/**
+ * @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));
+}
+