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+/****************************************************************************
+**
+** 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  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.
+
+#ifndef Patternist_InsertionIterator_H
+#define Patternist_InsertionIterator_H
+
+#include "qabstractxmlforwarditerator_p.h"
+#include "qitem_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    /**
+     * @short Conceptually inserts one QAbstractXmlForwardIterator into another, make two QAbstractXmlForwardIterator instances appear as one.
+     *
+     * An InsertionIterator represents a sequence that is the merge of two
+     * sequences, where one of the iterators is conceptually inserted at a
+     * given position. This is done while retaining the characteristic of being
+     * pull-based.
+     *
+     * InsertionIterator contains the logic for the implementation of the <tt>fn:insert-before()</tt>
+     * function, whose definition therefore specifies the detailed behaviors of the
+     * InsertionIterator.
+     *
+     * @see <a href="http://www.w3.org/TR/xpath-functions/#func-insert-before">XQuery 1.0
+     * and XPath 2.0 Functions and Operators, 15.1.7 fn:insert-before</a>
+     * @author Frans Englich <fenglich@trolltech.com>
+     * @ingroup Patternist_iterators
+     */
+    class InsertionIterator : public Item::Iterator
+    {
+    public:
+
+        /**
+         * Creates an InsertionIterator whose result is a merge of the
+         * iterator @p insertIterator into the iterator @p target at position @p
+         * position.
+         *
+         * @param target the iterator containing the items that the
+         * item in @p insertIterator will be inserted into.
+         * @param position the insertion position. Must be 1 or larger
+         * @param insertIterator the iterator containing the items to insert
+         * at position @p position
+         */
+        InsertionIterator(const Item::Iterator::Ptr &target,
+                          const xsInteger position,
+                          const Item::Iterator::Ptr &insertIterator);
+
+        virtual Item next();
+        virtual Item current() const;
+        virtual xsInteger position() const;
+        virtual xsInteger count();
+        virtual Item::Iterator::Ptr copy() const;
+
+    private:
+        const Item::Iterator::Ptr m_target;
+        const xsInteger m_insertPos;
+        const Item::Iterator::Ptr m_inserts;
+        Item m_current;
+        xsInteger m_position;
+        bool m_isInserting;
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif