--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/data/qcomparisonfactory.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,154 @@
+/****************************************************************************
+**
+** Copyright (C) 2008 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qatomiccomparators_p.h"
+#include "qatomicstring_p.h"
+#include "qcomparisonplatform_p.h"
+#include "qvaluefactory_p.h"
+
+#include "qcomparisonfactory_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+/**
+ * @short Helper class for ComparisonFactory::fromLexical() which exposes
+ * CastingPlatform appropriately.
+ *
+ * @relates ComparisonFactory
+ */
+class PerformComparison : public ComparisonPlatform<PerformComparison, true>
+                        , public SourceLocationReflection
+{
+public:
+    PerformComparison(const SourceLocationReflection *const sourceLocationReflection,
+                      const AtomicComparator::Operator op) : m_sourceReflection(sourceLocationReflection)
+                                                           , m_operator(op)
+    {
+        Q_ASSERT(m_sourceReflection);
+    }
+
+    bool operator()(const AtomicValue::Ptr &operand1,
+                    const AtomicValue::Ptr &operand2,
+                    const SchemaType::Ptr &type,
+                    const ReportContext::Ptr &context)
+    {
+        const ItemType::Ptr asItemType((AtomicType::Ptr(type)));
+
+        /* One area where the Query Transform world differs from the Schema
+         * world is that @c xs:duration is not considedered comparable, because
+         * it's according to Schema is partially comparable. This means
+         * ComparisonPlatform::fetchComparator() flags it as impossible, and
+         * hence we need to override that.
+         *
+         * SchemaType::wxsTypeMatches() will return true for sub-types of @c
+         * xs:duration as well, but that's ok since AbstractDurationComparator
+         * works for them too. */
+        if(BuiltinTypes::xsDuration->wxsTypeMatches(type))
+            prepareComparison(AtomicComparator::Ptr(new AbstractDurationComparator()));
+        else if (BuiltinTypes::xsGYear->wxsTypeMatches(type) ||
+                 BuiltinTypes::xsGYearMonth->wxsTypeMatches(type) ||
+                 BuiltinTypes::xsGMonth->wxsTypeMatches(type) ||
+                 BuiltinTypes::xsGMonthDay->wxsTypeMatches(type) ||
+                 BuiltinTypes::xsGDay->wxsTypeMatches(type))
+            prepareComparison(AtomicComparator::Ptr(new AbstractDateTimeComparator()));
+        else
+            prepareComparison(fetchComparator(asItemType, asItemType, context));
+
+        return flexibleCompare(operand1, operand2, context);
+    }
+
+    const SourceLocationReflection *actualReflection() const
+    {
+        return m_sourceReflection;
+    }
+
+    AtomicComparator::Operator operatorID() const
+    {
+        return m_operator;
+    }
+
+private:
+    const SourceLocationReflection *const m_sourceReflection;
+    const AtomicComparator::Operator      m_operator;
+};
+
+bool ComparisonFactory::compare(const AtomicValue::Ptr &operand1,
+                                const AtomicComparator::Operator op,
+                                const AtomicValue::Ptr &operand2,
+                                const SchemaType::Ptr &type,
+                                const ReportContext::Ptr &context,
+                                const SourceLocationReflection *const sourceLocationReflection)
+{
+    Q_ASSERT(operand1);
+    Q_ASSERT(operand2);
+    Q_ASSERT(context);
+    Q_ASSERT(sourceLocationReflection);
+    Q_ASSERT(type);
+    Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,
+               "We can only compare atomic values.");
+
+    return PerformComparison(sourceLocationReflection, op)(operand1, operand2, type, context);
+}
+
+bool ComparisonFactory::constructAndCompare(const DerivedString<TypeString>::Ptr &operand1,
+                                            const AtomicComparator::Operator op,
+                                            const DerivedString<TypeString>::Ptr &operand2,
+                                            const SchemaType::Ptr &type,
+                                            const ReportContext::Ptr &context,
+                                            const SourceLocationReflection *const sourceLocationReflection)
+{
+    Q_ASSERT(operand1);
+    Q_ASSERT(operand2);
+    Q_ASSERT(context);
+    Q_ASSERT(sourceLocationReflection);
+    Q_ASSERT(type);
+    Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,
+               "We can only compare atomic values.");
+
+    const AtomicValue::Ptr value1 = ValueFactory::fromLexical(operand1->stringValue(), type, context, sourceLocationReflection);
+    const AtomicValue::Ptr value2 = ValueFactory::fromLexical(operand2->stringValue(), type, context, sourceLocationReflection);
+
+    return compare(value1, op, value2, type, context, sourceLocationReflection);
+}
+
+QT_END_NAMESPACE