diff -r 000000000000 -r 1918ee327afb examples/xmlpatterns/qobjectxmlmodel/qobjectxmlmodel.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/xmlpatterns/qobjectxmlmodel/qobjectxmlmodel.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,459 @@
+/****************************************************************************
+**
+** 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 examples 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 <QVector>
+#include <QtDebug>
+
+#include <QCoreApplication>
+#include <QMetaProperty>
+#include <QXmlQuery>
+#include <QXmlResultItems>
+
+#include "qobjectxmlmodel.h"
+
+QT_BEGIN_NAMESPACE
+
+/*
+<metaObjects>
+    <metaObject className="QObject"/>
+    <metaObject className="QWidget" superClass="QObject">
+    </metaObject>
+    ...
+</metaObjects>
+<QObject objectName="MyWidget" property1="..." property2="..."> <!-- This is root() -->
+    <QObject objectName="MyFOO" property1="..."/>
+    ....
+</QObject>
+*/
+
+QObjectXmlModel::QObjectXmlModel(QObject *const object, const QXmlNamePool &np)
+    : QSimpleXmlNodeModel(np),
+      m_baseURI(QUrl::fromLocalFile(QCoreApplication::applicationFilePath())),
+      m_root(object),
+      m_allMetaObjects(allMetaObjects())
+{
+    Q_ASSERT(m_baseURI.isValid());
+}
+
+//! [5]
+QXmlNodeModelIndex QObjectXmlModel::qObjectSibling(const int pos, const QXmlNodeModelIndex &n) const
+{
+    Q_ASSERT(pos == 1 || pos == -1);
+    Q_ASSERT(asQObject(n));
+
+    const QObject *parent = asQObject(n)->parent();
+    if (parent) {
+        const QList<QObject *> &children = parent->children();
+        const int siblingPos = children.indexOf(asQObject(n)) + pos;
+
+        if (siblingPos >= 0 && siblingPos < children.count())
+            return createIndex(children.at(siblingPos));
+        else
+            return QXmlNodeModelIndex();
+    }
+    else
+        return QXmlNodeModelIndex();
+}
+//! [5]
+
+//! [1]
+QObjectXmlModel::QObjectNodeType QObjectXmlModel::toNodeType(const QXmlNodeModelIndex &n)
+{
+    return QObjectNodeType(n.additionalData() & (15 << 26));
+}
+//! [1]
+
+//! [9]
+QObjectXmlModel::AllMetaObjects QObjectXmlModel::allMetaObjects() const
+{
+    QXmlQuery query(namePool());
+    query.bindVariable("root", root());
+    query.setQuery("declare variable $root external;"
+                   "$root/descendant-or-self::QObject");
+    Q_ASSERT(query.isValid());
+
+    QXmlResultItems result;
+    query.evaluateTo(&result);
+    QXmlItem i(result.next());
+
+    AllMetaObjects objects;
+    while (!i.isNull()) {
+        const QMetaObject *moo = asQObject(i.toNodeModelIndex())->metaObject();
+        while (moo) {
+            if (!objects.contains(moo))
+                objects.append(moo);
+            moo = moo->superClass();
+        }
+        i = result.next();
+    }
+
+    Q_ASSERT(!objects.contains(0));
+    return objects;
+}
+//! [9]
+
+QXmlNodeModelIndex QObjectXmlModel::metaObjectSibling(const int pos, const QXmlNodeModelIndex &n) const
+{
+    Q_ASSERT(pos == 1 || pos == -1);
+    Q_ASSERT(!n.isNull());
+
+    const int indexOf = m_allMetaObjects.indexOf(static_cast<const QMetaObject *>(n.internalPointer())) + pos;
+
+    if (indexOf >= 0 && indexOf < m_allMetaObjects.count())
+        return createIndex(const_cast<QMetaObject *>(m_allMetaObjects.at(indexOf)), MetaObject);
+    else
+        return QXmlNodeModelIndex();
+}
+
+//! [2]
+QXmlNodeModelIndex QObjectXmlModel::nextFromSimpleAxis(SimpleAxis axis, const QXmlNodeModelIndex &n) const
+{
+    switch (toNodeType(n))
+    {
+        case IsQObject:
+        {
+            switch (axis)
+            {
+                case Parent:
+                    return createIndex(asQObject(n)->parent());
+
+                case FirstChild:
+                {
+                    if (!asQObject(n) || asQObject(n)->children().isEmpty())
+                        return QXmlNodeModelIndex();
+                    else
+                        return createIndex(asQObject(n)->children().first());
+                }
+                
+                case NextSibling:
+                    return qObjectSibling(1, n);
+
+//! [10]                    
+                case PreviousSibling:
+                {
+                    if (asQObject(n) == m_root)
+                        return createIndex(qint64(0), MetaObjects);
+                    else
+                        return qObjectSibling(-1, n);
+                }
+//! [10]                    
+            }
+            Q_ASSERT(false);
+        }
+
+//! [7]
+        case QObjectClassName:
+        case QObjectProperty:
+        {
+            Q_ASSERT(axis == Parent);
+            return createIndex(asQObject(n));
+        }
+//! [7]
+//! [2]
+//! [3]
+
+//! [11]        
+        case MetaObjects:
+        {
+            switch (axis)
+            {
+                case Parent:
+                    return QXmlNodeModelIndex();
+                case PreviousSibling:
+                    return QXmlNodeModelIndex();
+                case NextSibling:
+                    return root();
+                case FirstChild:
+                {
+                    return createIndex(const_cast<QMetaObject*>(m_allMetaObjects.first()),MetaObject);
+                }
+            }
+            Q_ASSERT(false);
+        }
+//! [11]        
+
+        case MetaObject:
+        {
+            switch (axis)
+            {
+                case FirstChild:
+                    return QXmlNodeModelIndex();
+                case Parent:
+                    return createIndex(qint64(0), MetaObjects);
+                case PreviousSibling:
+                    return metaObjectSibling(-1, n);
+                case NextSibling:
+                    return metaObjectSibling(1, n);
+            }
+        }
+
+        case MetaObjectClassName:
+        case MetaObjectSuperClass:
+        {
+            Q_ASSERT(axis == Parent);
+            return createIndex(asQObject(n), MetaObject);
+        }
+//! [3]
+//! [4]
+    }
+
+    Q_ASSERT(false);
+    return QXmlNodeModelIndex();
+}
+//! [4]
+
+//! [6]
+QVector<QXmlNodeModelIndex> QObjectXmlModel::attributes(const QXmlNodeModelIndex& n) const
+{
+     QVector<QXmlNodeModelIndex> result;
+     QObject *const object = asQObject(n);
+
+     switch(toNodeType(n))
+     {
+        case IsQObject:
+        {
+            const QMetaObject *const metaObject = object->metaObject();
+            const int count = metaObject->propertyCount();
+            result.append(createIndex(object, QObjectClassName));
+
+            for (int i = 0; i < count; ++i) {
+                const QMetaProperty qmp(metaObject->property(i));
+                const int ii = metaObject->indexOfProperty(qmp.name());
+                if (i == ii)
+                    result.append(createIndex(object, QObjectProperty | i));
+            }
+            return result;
+        }
+//! [6]
+
+        case MetaObject:
+        {
+            result.append(createIndex(object, MetaObjectClassName));
+            result.append(createIndex(object, MetaObjectSuperClass));
+            return result;
+        }
+//! [8]
+        default:
+            return QVector<QXmlNodeModelIndex>();
+     }
+}
+//! [8]
+
+QObject *QObjectXmlModel::asQObject(const QXmlNodeModelIndex &n)
+{
+    return static_cast<QObject *>(n.internalPointer());
+}
+
+bool QObjectXmlModel::isProperty(const QXmlNodeModelIndex n)
+{
+    return n.additionalData() & QObjectProperty;
+}
+
+QUrl QObjectXmlModel::documentUri(const QXmlNodeModelIndex& ) const
+{
+    return m_baseURI;
+}
+
+QXmlNodeModelIndex::NodeKind QObjectXmlModel::kind(const QXmlNodeModelIndex& n) const
+{
+    switch (toNodeType(n))
+    {
+        case IsQObject:
+        case MetaObject:
+        case MetaObjects:
+            return QXmlNodeModelIndex::Element;
+
+        case QObjectProperty:
+        case MetaObjectClassName:
+        case MetaObjectSuperClass:
+        case QObjectClassName:
+            return QXmlNodeModelIndex::Attribute;
+    }
+
+    Q_ASSERT(false);
+    return QXmlNodeModelIndex::Element;
+}
+
+QXmlNodeModelIndex::DocumentOrder QObjectXmlModel::compareOrder(const QXmlNodeModelIndex& , const QXmlNodeModelIndex& ) const
+{
+    return QXmlNodeModelIndex::Follows; // TODO
+}
+
+//! [0]
+QXmlNodeModelIndex QObjectXmlModel::root() const
+{
+    return createIndex(m_root);
+}
+//! [0]
+
+QXmlNodeModelIndex QObjectXmlModel::root(const QXmlNodeModelIndex& n) const
+{
+    QObject *p = asQObject(n);
+    Q_ASSERT(p);
+
+    do {
+        QObject *const candidate = p->parent();
+        if (candidate)
+            p = candidate;
+        else
+            break;
+    }
+    while (true);
+
+    return createIndex(p);
+}
+
+/*!
+  We simply throw all of them into a QList and
+  return an iterator over it.
+ */
+QXmlNodeModelIndex::List QObjectXmlModel::ancestors(const QXmlNodeModelIndex n) const
+{
+    const QObject *p = asQObject(n);
+    Q_ASSERT(p);
+
+    QXmlNodeModelIndex::List result;
+    do {
+        QObject *const candidate = p->parent();
+        if (candidate) {
+            result.append(createIndex(candidate, 0));
+            p = candidate;
+        }
+        else
+            break;
+    }
+    while (true);
+
+    return result;
+}
+
+QMetaProperty QObjectXmlModel::toMetaProperty(const QXmlNodeModelIndex &n)
+{
+    const int propertyOffset = n.additionalData() & (~QObjectProperty);
+    const QObject *const qo = asQObject(n);
+    return qo->metaObject()->property(propertyOffset);
+}
+
+QXmlName QObjectXmlModel::name(const QXmlNodeModelIndex &n) const
+{
+    switch (toNodeType(n))
+    {
+        case IsQObject:
+            return QXmlName(namePool(), QLatin1String("QObject"));
+        case MetaObject:
+            return QXmlName(namePool(), QLatin1String("metaObject"));
+        case QObjectClassName:
+        case MetaObjectClassName:
+            return QXmlName(namePool(), QLatin1String("className"));
+        case QObjectProperty:
+            return QXmlName(namePool(), toMetaProperty(n).name());
+        case MetaObjects:
+            return QXmlName(namePool(), QLatin1String("metaObjects"));
+        case MetaObjectSuperClass:
+            return QXmlName(namePool(), QLatin1String("superClass"));
+    }
+
+    Q_ASSERT(false);
+    return QXmlName();
+}
+
+QVariant QObjectXmlModel::typedValue(const QXmlNodeModelIndex &n) const
+{
+    switch (toNodeType(n))
+    {
+        case QObjectProperty:
+        {
+           const QVariant &candidate = toMetaProperty(n).read(asQObject(n));
+           if (isTypeSupported(candidate.type()))
+               return candidate;
+           else
+               return QVariant();
+        }
+        
+        case MetaObjectClassName:
+            return QVariant(static_cast<QMetaObject*>(n.internalPointer())->className());
+            
+        case MetaObjectSuperClass:
+        {
+            const QMetaObject *const superClass = static_cast<QMetaObject*>(n.internalPointer())->superClass();
+            if (superClass)
+                return QVariant(superClass->className());
+            else
+                return QVariant();
+        }
+        
+        case QObjectClassName:
+            return QVariant(asQObject(n)->metaObject()->className());
+            
+        default:
+            return QVariant();
+    }
+}
+
+/*!
+ Returns \c true if QVariants of type \a type can be used
+ in QtXmlPatterns, otherwise \c false.
+ */
+bool QObjectXmlModel::isTypeSupported(QVariant::Type type)
+{
+    /* See data/qatomicvalue.cpp too. */
+    switch (type)
+    {
+        /* Fallthrough all these. */
+        case QVariant::Char:
+        case QVariant::String:
+        case QVariant::Url:
+        case QVariant::Bool:
+        case QVariant::ByteArray:
+        case QVariant::Int:
+        case QVariant::LongLong:
+        case QVariant::ULongLong:
+        case QVariant::Date:
+        case QVariant::DateTime:
+        case QVariant::Time:
+        case QVariant::Double:
+            return true;
+        default:
+            return false;
+    }
+}
+
+QT_END_NAMESPACE