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diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qabstractfileengine.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qabstractfileengine.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+class ZipEngineHandler : public QAbstractFileEngineHandler
+{
+public:
+    QAbstractFileEngine *create(const QString &fileName) const;
+};
+
+QAbstractFileEngine *ZipEngineHandler::create(const QString &fileName) const
+{
+    // ZipEngineHandler returns a ZipEngine for all .zip files
+    return fileName.toLower().endsWith(".zip") ? new ZipEngine(fileName) : 0;
+}
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    ZipEngineHandler engine;
+
+    MainWindow window;
+    window.show();
+
+    return app.exec();
+}
+//! [0]
+
+
+//! [1]
+QAbstractSocketEngine *ZipEngineHandler::create(const QString &fileName) const
+{
+    // ZipEngineHandler returns a ZipEngine for all .zip files
+    return fileName.toLower().endsWith(".zip") ? new ZipEngine(fileName) : 0;
+}
+//! [1]
+
+
+//! [2]
+QAbstractFileEngineIterator *
+CustomFileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
+{
+    return new CustomFileEngineIterator(filters, filterNames);
+}
+//! [2]
+
+
+//! [3]
+class CustomIterator : public QAbstractFileEngineIterator
+{
+public:
+    CustomIterator(const QStringList &nameFilters, QDir::Filters filters)
+        : QAbstractFileEngineIterator(nameFilters, filters), index(0)
+    {
+        // In a real iterator, these entries are fetched from the
+        // file system based on the value of path().
+        entries << "entry1" << "entry2" << "entry3";
+    }
+
+    bool hasNext() const
+    {
+        return index < entries.size() - 1;
+    }
+
+    QString next()
+    {
+       if (!hasNext())
+           return QString();
+       ++index;
+       return currentFilePath();
+    }
+
+    QString currentFileName()
+    {
+        return entries.at(index);
+    }
+
+private:
+    QStringList entries;
+    int index;
+};
+//! [3]