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diff --git a/src/declarative/qml/qdeclarativepropertycache.cpp b/src/declarative/qml/qdeclarativepropertycache.cpp
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+++ b/src/declarative/qml/qdeclarativepropertycache.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 "qdeclarativepropertycache_p.h"
+
+#include "qdeclarativeengine_p.h"
+#include "qdeclarativebinding_p.h"
+#include <QtCore/qdebug.h>
+
+Q_DECLARE_METATYPE(QScriptValue);
+
+QT_BEGIN_NAMESPACE
+
+QDeclarativePropertyCache::Data::Flags QDeclarativePropertyCache::Data::flagsForProperty(const QMetaProperty &p, QDeclarativeEngine *engine) 
+{
+    int propType = p.userType();
+
+    Flags flags;
+
+    if (p.isConstant())
+        flags |= Data::IsConstant;
+    if (p.isWritable())
+        flags |= Data::IsWritable;
+    if (p.isResettable())
+        flags |= Data::IsResettable;
+
+    if (propType == qMetaTypeId<QDeclarativeBinding *>()) {
+        flags |= Data::IsQmlBinding;
+    } else if (propType == qMetaTypeId<QScriptValue>()) {
+        flags |= Data::IsQScriptValue;
+    } else if (p.isEnumType()) {
+        flags |= Data::IsEnumType;
+    } else {
+        QDeclarativeMetaType::TypeCategory cat = engine ? QDeclarativeEnginePrivate::get(engine)->typeCategory(propType)
+                                               : QDeclarativeMetaType::typeCategory(propType);
+        if (cat == QDeclarativeMetaType::Object)
+            flags |= Data::IsQObjectDerived;
+        else if (cat == QDeclarativeMetaType::List)
+            flags |= Data::IsQList;
+    }
+
+    return flags;
+}
+
+void QDeclarativePropertyCache::Data::load(const QMetaProperty &p, QDeclarativeEngine *engine)
+{
+    propType = p.userType();
+    if (QVariant::Type(propType) == QVariant::LastType)
+        propType = qMetaTypeId<QVariant>();
+    coreIndex = p.propertyIndex();
+    notifyIndex = p.notifySignalIndex();
+    flags = flagsForProperty(p, engine);
+}
+
+void QDeclarativePropertyCache::Data::load(const QMetaMethod &m)
+{
+    coreIndex = m.methodIndex();
+    flags |= Data::IsFunction;
+    propType = QVariant::Invalid;
+
+    const char *returnType = m.typeName();
+    if (returnType) 
+        propType = QMetaType::type(returnType);
+
+    QList<QByteArray> params = m.parameterTypes();
+    if (!params.isEmpty())
+        flags |= Data::HasArguments;
+}
+
+
+QDeclarativePropertyCache::QDeclarativePropertyCache(QDeclarativeEngine *e)
+: QDeclarativeCleanup(e), engine(e)
+{
+}
+
+QDeclarativePropertyCache::~QDeclarativePropertyCache()
+{
+    clear();
+}
+
+void QDeclarativePropertyCache::clear()
+{
+    for (int ii = 0; ii < indexCache.count(); ++ii) 
+        indexCache.at(ii)->release();
+
+    for (StringCache::ConstIterator iter = stringCache.begin(); 
+            iter != stringCache.end(); ++iter)
+        (*iter)->release();
+
+    for (IdentifierCache::ConstIterator iter = identifierCache.begin(); 
+            iter != identifierCache.end(); ++iter)
+        (*iter)->release();
+
+    indexCache.clear();
+    stringCache.clear();
+    identifierCache.clear();
+}
+
+QDeclarativePropertyCache::Data QDeclarativePropertyCache::create(const QMetaObject *metaObject, 
+                                                const QString &property)
+{
+    Q_ASSERT(metaObject);
+
+    QDeclarativePropertyCache::Data rv;
+    int idx = metaObject->indexOfProperty(property.toUtf8());
+    if (idx != -1) {
+        rv.load(metaObject->property(idx));
+        return rv;
+    }
+
+    int methodCount = metaObject->methodCount();
+    for (int ii = methodCount - 1; ii >= 0; --ii) {
+        QMetaMethod m = metaObject->method(ii);
+        if (m.access() == QMetaMethod::Private)
+            continue;
+        QString methodName = QString::fromUtf8(m.signature());
+
+        int parenIdx = methodName.indexOf(QLatin1Char('('));
+        Q_ASSERT(parenIdx != -1);
+        methodName = methodName.left(parenIdx);
+
+        if (methodName == property) {
+            rv.load(m);
+            return rv;
+        }
+    }
+
+    return rv;
+}
+
+QDeclarativePropertyCache *QDeclarativePropertyCache::copy() const
+{
+    QDeclarativePropertyCache *cache = new QDeclarativePropertyCache(engine);
+    cache->indexCache = indexCache;
+    cache->stringCache = stringCache;
+    cache->identifierCache = identifierCache;
+
+    for (int ii = 0; ii < indexCache.count(); ++ii)
+        indexCache.at(ii)->addref();
+    for (StringCache::ConstIterator iter = stringCache.begin(); iter != stringCache.end(); ++iter)
+        (*iter)->addref();
+    for (IdentifierCache::ConstIterator iter = identifierCache.begin(); iter != identifierCache.end(); ++iter)
+        (*iter)->addref();
+
+    return cache;
+}
+
+void QDeclarativePropertyCache::append(QDeclarativeEngine *engine, const QMetaObject *metaObject, 
+                              Data::Flag propertyFlags, Data::Flag methodFlags)
+{
+    QDeclarativeEnginePrivate *enginePriv = QDeclarativeEnginePrivate::get(engine);
+
+    int propCount = metaObject->propertyCount();
+    int propOffset = metaObject->propertyOffset();
+
+    indexCache.resize(propCount);
+    for (int ii = propOffset; ii < propCount; ++ii) {
+        QMetaProperty p = metaObject->property(ii);
+        QString propName = QString::fromUtf8(p.name());
+
+        RData *data = new RData;
+        data->identifier = enginePriv->objectClass->createPersistentIdentifier(propName);
+
+        data->load(p, engine);
+        data->flags |= propertyFlags;
+
+        indexCache[ii] = data;
+
+        if (stringCache.contains(propName)) {
+            stringCache[propName]->release();
+            identifierCache[data->identifier.identifier]->release();
+        }
+
+        stringCache.insert(propName, data);
+        identifierCache.insert(data->identifier.identifier, data);
+        data->addref();
+        data->addref();
+    }
+
+    int methodCount = metaObject->methodCount();
+    int methodOffset = metaObject->methodOffset();
+    for (int ii = methodOffset; ii < methodCount; ++ii) {
+        QMetaMethod m = metaObject->method(ii);
+        if (m.access() == QMetaMethod::Private)
+            continue;
+        QString methodName = QString::fromUtf8(m.signature());
+
+        int parenIdx = methodName.indexOf(QLatin1Char('('));
+        Q_ASSERT(parenIdx != -1);
+        methodName = methodName.left(parenIdx);
+
+        RData *data = new RData;
+        data->identifier = enginePriv->objectClass->createPersistentIdentifier(methodName);
+
+        if (stringCache.contains(methodName)) {
+            stringCache[methodName]->release();
+            identifierCache[data->identifier.identifier]->release();
+        }
+
+        data->load(m);
+        if (m.methodType() == QMetaMethod::Slot || m.methodType() == QMetaMethod::Method) 
+            data->flags |= methodFlags;
+
+        stringCache.insert(methodName, data);
+        identifierCache.insert(data->identifier.identifier, data);
+        data->addref();
+    }
+}
+
+// ### Optimize - check engine for the parent meta object etc.
+QDeclarativePropertyCache *QDeclarativePropertyCache::create(QDeclarativeEngine *engine, const QMetaObject *metaObject)
+{
+    Q_ASSERT(engine);
+    Q_ASSERT(metaObject);
+
+    QDeclarativePropertyCache *cache = new QDeclarativePropertyCache(engine);
+    cache->update(engine, metaObject);
+    return cache;
+}
+
+void QDeclarativePropertyCache::update(QDeclarativeEngine *engine, const QMetaObject *metaObject)
+{
+    Q_ASSERT(engine);
+    Q_ASSERT(metaObject);
+    QDeclarativeEnginePrivate *enginePriv = QDeclarativeEnginePrivate::get(engine);
+
+    clear();
+
+    // ### The properties/methods should probably be spliced on a per-metaobject basis
+    int propCount = metaObject->propertyCount();
+
+    indexCache.resize(propCount);
+    for (int ii = propCount - 1; ii >= 0; --ii) {
+        QMetaProperty p = metaObject->property(ii);
+        QString propName = QString::fromUtf8(p.name());
+
+        RData *data = new RData;
+        data->identifier = enginePriv->objectClass->createPersistentIdentifier(propName);
+
+        data->load(p, engine);
+
+        indexCache[ii] = data;
+
+        if (stringCache.contains(propName))
+            continue;
+
+        stringCache.insert(propName, data);
+        identifierCache.insert(data->identifier.identifier, data);
+        data->addref();
+        data->addref();
+    }
+
+    int methodCount = metaObject->methodCount();
+    for (int ii = methodCount - 1; ii >= 0; --ii) {
+        QMetaMethod m = metaObject->method(ii);
+        if (m.access() == QMetaMethod::Private)
+            continue;
+        QString methodName = QString::fromUtf8(m.signature());
+
+        int parenIdx = methodName.indexOf(QLatin1Char('('));
+        Q_ASSERT(parenIdx != -1);
+        methodName = methodName.left(parenIdx);
+
+        if (stringCache.contains(methodName))
+            continue;
+
+        RData *data = new RData;
+        data->identifier = enginePriv->objectClass->createPersistentIdentifier(methodName);
+
+        data->load(m);
+
+        stringCache.insert(methodName, data);
+        identifierCache.insert(data->identifier.identifier, data);
+        data->addref();
+    }
+}
+
+QDeclarativePropertyCache::Data *
+QDeclarativePropertyCache::property(int index) const
+{
+    if (index < 0 || index >= indexCache.count())
+        return 0;
+
+    return indexCache.at(index);
+}
+
+QDeclarativePropertyCache::Data *
+QDeclarativePropertyCache::property(const QString &str) const
+{
+    return stringCache.value(str);
+}
+
+QString QDeclarativePropertyCache::Data::name(QObject *object)
+{
+    if (!object)
+        return QString();
+
+    return name(object->metaObject());
+}
+
+QString QDeclarativePropertyCache::Data::name(const QMetaObject *metaObject)
+{
+    if (!metaObject || coreIndex == -1)
+        return QString();
+
+    if (flags & IsFunction) {
+        QMetaMethod m = metaObject->method(coreIndex);
+
+        QString name = QString::fromUtf8(m.signature());
+        int parenIdx = name.indexOf(QLatin1Char('('));
+        if (parenIdx != -1)
+            name = name.left(parenIdx);
+        return name;
+    } else {
+        QMetaProperty p = metaObject->property(coreIndex);
+        return QString::fromUtf8(p.name());
+    }
+}
+
+QStringList QDeclarativePropertyCache::propertyNames() const
+{
+    return stringCache.keys();
+}
+
+QDeclarativePropertyCache::Data *QDeclarativePropertyCache::property(QDeclarativeEngine *engine, QObject *obj, 
+                                                   const QScriptDeclarativeClass::Identifier &name, Data &local)
+{
+    QDeclarativePropertyCache::Data *rv = 0;
+
+    QDeclarativeEnginePrivate *enginePrivate = QDeclarativeEnginePrivate::get(engine);
+
+    QDeclarativePropertyCache *cache = 0;
+    QDeclarativeDeclarativeData *ddata = QDeclarativeDeclarativeData::get(obj);
+    if (ddata && ddata->propertyCache && ddata->propertyCache->qmlEngine() == engine)
+        cache = ddata->propertyCache;
+    if (!cache) {
+        cache = enginePrivate->cache(obj);
+        if (cache && ddata && !ddata->propertyCache) { cache->addref(); ddata->propertyCache = cache; }
+    }
+
+    if (cache) {
+        rv = cache->property(name);
+    } else {
+        local = QDeclarativePropertyCache::create(obj->metaObject(), enginePrivate->objectClass->toString(name));
+        if (local.isValid())
+            rv = &local;
+    }
+
+    return rv;
+}
+
+QDeclarativePropertyCache::Data *QDeclarativePropertyCache::property(QDeclarativeEngine *engine, QObject *obj, 
+                                                   const QString &name, Data &local)
+{
+    QDeclarativePropertyCache::Data *rv = 0;
+
+    if (!engine) {
+        local = QDeclarativePropertyCache::create(obj->metaObject(), name);
+        if (local.isValid())
+            rv = &local;
+    } else {
+        QDeclarativeEnginePrivate *enginePrivate = QDeclarativeEnginePrivate::get(engine);
+
+        QDeclarativePropertyCache *cache = 0;
+        QDeclarativeDeclarativeData *ddata = QDeclarativeDeclarativeData::get(obj);
+        if (ddata && ddata->propertyCache && ddata->propertyCache->qmlEngine() == engine)
+            cache = ddata->propertyCache;
+        if (!cache) {
+            cache = enginePrivate->cache(obj);
+            if (cache && ddata && !ddata->propertyCache) { cache->addref(); ddata->propertyCache = cache; }
+        }
+
+        if (cache) {
+            rv = cache->property(name);
+        } else {
+            local = QDeclarativePropertyCache::create(obj->metaObject(), name);
+            if (local.isValid())
+                rv = &local;
+        }
+    }
+
+    return rv;
+}
+
+QT_END_NAMESPACE