1 files changed, 152 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qifthenclause.cpp b/src/xmlpatterns/expr/qifthenclause.cpp
new file mode 100644
index 0000000..454df9a
--- /dev/null
+++ b/src/xmlpatterns/expr/qifthenclause.cpp
@@ -0,0 +1,152 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qcommonsequencetypes_p.h"
+#include "qgenericsequencetype_p.h"
+#include "qoptimizationpasses_p.h"
+
+#include "qifthenclause_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+IfThenClause::IfThenClause(const Expression::Ptr &test,
+                           const Expression::Ptr &then,
+                           const Expression::Ptr &el) : TripleContainer(test, then, el)
+{
+}
+
+Item::Iterator::Ptr IfThenClause::evaluateSequence(const DynamicContext::Ptr &context) const
+{
+    return m_operand1->evaluateEBV(context)
+            ? m_operand2->evaluateSequence(context)
+            : m_operand3->evaluateSequence(context);
+}
+
+Item IfThenClause::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    return m_operand1->evaluateEBV(context)
+            ? m_operand2->evaluateSingleton(context)
+            : m_operand3->evaluateSingleton(context);
+}
+
+bool IfThenClause::evaluateEBV(const DynamicContext::Ptr &context) const
+{
+    return m_operand1->evaluateEBV(context)
+            ? m_operand2->evaluateEBV(context)
+            : m_operand3->evaluateEBV(context);
+}
+
+void IfThenClause::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
+{
+    if(m_operand1->evaluateEBV(context))
+        m_operand2->evaluateToSequenceReceiver(context);
+    else
+        m_operand3->evaluateToSequenceReceiver(context);
+}
+
+Expression::Ptr IfThenClause::compress(const StaticContext::Ptr &context)
+{
+    const Expression::Ptr me(TripleContainer::compress(context));
+
+    if(me != this)
+        return me;
+
+    /* All operands mustn't be evaluated in order for const folding to
+     * be possible. Let's see how far we get. */
+
+    if(m_operand1->isEvaluated())
+    {
+        if(m_operand1->evaluateEBV(context->dynamicContext()))
+            return m_operand2;
+        else
+            return m_operand3;
+    }
+    else
+        return me;
+}
+
+QList<QExplicitlySharedDataPointer<OptimizationPass> > IfThenClause::optimizationPasses() const
+{
+    return OptimizationPasses::ifThenPasses;
+}
+
+SequenceType::List IfThenClause::expectedOperandTypes() const
+{
+    SequenceType::List result;
+    result.append(CommonSequenceTypes::EBV);
+    result.append(CommonSequenceTypes::ZeroOrMoreItems);
+    result.append(CommonSequenceTypes::ZeroOrMoreItems);
+    return result;
+}
+
+SequenceType::Ptr IfThenClause::staticType() const
+{
+    const SequenceType::Ptr t1(m_operand2->staticType());
+    const SequenceType::Ptr t2(m_operand3->staticType());
+
+    return makeGenericSequenceType(t1->itemType() | t2->itemType(),
+                                   t1->cardinality() | t2->cardinality());
+}
+
+ExpressionVisitorResult::Ptr IfThenClause::accept(const ExpressionVisitor::Ptr &visitor) const
+{
+    return visitor->visit(this);
+}
+
+Expression::ID IfThenClause::id() const
+{
+    return IDIfThenClause;
+}
+
+/*
+Expression::Properties IfThenClause::properties() const
+{
+    return   m_operand1->properties()
+           | m_operand2->properties()
+           | m_operand3->properties()
+           & (  Expression::RequiresFocus
+              | Expression::IsEvaluated
+              | Expression::DisableElimination);
+}
+*/
+QT_END_NAMESPACE