Refactored the UserDataContainer so that the osg::UserDataContainer is now a pure virtual base class,

with a osg::DefaultUserDataContainer subclassed from this.  The user object access methods have now all
been moved from osg::Object into the UserDataContainer class, except for the set/getUserData() methods
that are left in osg::Object for backwards compatibility, and the description list access methods have
been moved back into osg::Node.

main UserObject access methods are now all def

examples/osguserdata/osguserdata.cpp

@@ -32,25 +32,25 @@ namespace MyNamespace
 {
 
 /** Provide an simple example of customizing the default UserDataContainer.*/
-class MyUserDataContainer : public osg::UserDataContainer
+class MyUserDataContainer : public osg::DefaultUserDataContainer
 {
     public:
         MyUserDataContainer() {}
         MyUserDataContainer(const MyUserDataContainer& udc, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
-            UserDataContainer(udc, copyop) {}
+            DefaultUserDataContainer(udc, copyop) {}
 
         META_Object(MyNamespace, MyUserDataContainer)
 
         virtual Object* getUserObject(unsigned int i)
         {
             OSG_NOTICE<<"MyUserDataContainer::getUserObject("<<i<<")"<<std::endl;
-            return  osg::UserDataContainer::getUserObject(i);
+            return  osg::DefaultUserDataContainer::getUserObject(i);
         }
 
         virtual const Object* getUserObject(unsigned int i) const
         {
             OSG_NOTICE<<"MyUserDataContainer::getUserObject("<<i<<") const"<<std::endl;
-            return osg::UserDataContainer::getUserObject(i);
+            return osg::DefaultUserDataContainer::getUserObject(i);
         }
 
 
@@ -64,7 +64,7 @@ class MyUserDataContainer : public osg::UserDataContainer
 REGISTER_OBJECT_WRAPPER( MyUserDataContainer,
                          new MyNamespace::MyUserDataContainer,
                          MyNamespace::MyUserDataContainer,
-                         "osg::Object osg::UserDataContainer MyNamespace::MyUserDataContainer" )
+                         "osg::Object osg::UserDataContainer osg::DefaultUserDataContainer MyNamespace::MyUserDataContainer" )
 {
 }
 
@@ -160,16 +160,20 @@ void testResults(osg::Node* node)
         OSG_NOTICE<<"Height not found"<<std::endl;
     }
 
-    OSG_NOTICE<<"node->getNumUserObjects()="<<node->getNumUserObjects()<<std::endl;
+    osg::UserDataContainer* udc = node->getUserDataContainer();
-    for(unsigned int i=0; i<node->getNumUserObjects(); ++i)
+    if (udc)
+    {
+        OSG_NOTICE<<"udc->getNumUserObjects()="<<udc->getNumUserObjects()<<std::endl;
+        for(unsigned int i=0; i<udc->getNumUserObjects(); ++i)
         {
             MyGetValueVisitor mgvv;
-        osg::Object* userObject = node->getUserObject(i);
+            osg::Object* userObject = udc->getUserObject(i);
             osg::ValueObject* valueObject = dynamic_cast<osg::ValueObject*>(userObject);
             OSG_NOTICE<<"userObject="<<userObject<<", className="<<userObject->className()<<", getName()="<<userObject->getName()<<" valueObject="<<valueObject<<" getNumeric "<<getNumeric<float>(userObject)<<" ";
             if (valueObject) valueObject->get(mgvv);
             OSG_NOTICE<<std::endl;
         }
+    }
     
     OSG_NOTICE<<std::endl<<std::endl;
 }
@@ -196,7 +200,7 @@ int main(int argc, char** argv)
 
     osg::ref_ptr<osg::Drawable> drawable = new osg::Geometry;
     drawable->setName("myDrawable");
-    node->addUserObject(drawable.get());
+    node->getOrCreateUserDataContainer()->addUserObject(drawable.get());
 
     node->setUserValue("fred",12);
     node->setUserValue("john",1.1);

include/osg/Node

@@ -318,6 +318,33 @@ class OSG_EXPORT Node : public Object
         /** Return the node's const StateSet. Returns NULL if a stateset is not attached.*/
         inline const osg::StateSet* getStateSet() const { return _stateset.get(); }
 
+
+        /** A vector of std::string's which are used to describe the object.*/
+        typedef std::vector<std::string> DescriptionList;
+
+        /** Set the list of string descriptions.*/
+        void setDescriptions(const DescriptionList& descriptions);
+
+        /** Get the description list of the node.*/
+        DescriptionList& getDescriptions();
+
+        /** Get the const description list of the const node.*/
+        const DescriptionList& getDescriptions() const;
+
+
+        /** Get a single const description of the const node.*/
+        const std::string& getDescription(unsigned int i) const;
+
+        /** Get a single description of the node.*/
+        std::string& getDescription(unsigned int i);
+
+        /** Get the number of descriptions of the node.*/
+        unsigned int getNumDescriptions() const;
+
+        /** Add a description string to the node.*/
+        void addDescription(const std::string& desc);
+        
+
         /** Set the initial bounding volume to use when computing the overall bounding volume.*/
         void setInitialBound(const osg::BoundingSphere& bsphere) { _initialBound = bsphere; dirtyBound(); }
 

include/osg/Object

@@ -26,6 +26,7 @@ namespace osg {
 
 // forward declare
 class State;
+class UserDataContainer;
 
 #define _ADDQUOTES(def) #def
 #define ADDQUOTES(def) _ADDQUOTES(def)
@@ -54,9 +55,9 @@ class OSG_EXPORT Object : public Referenced
             and therefore cannot be constructed on its own, only derived
             classes which override the clone and className methods are
             concrete classes and can be constructed.*/
-        inline Object():Referenced(),_dataVariance(UNSPECIFIED) {}
+        inline Object():Referenced(),_dataVariance(UNSPECIFIED), _userDataContainer(0) {}
 
-        inline explicit Object(bool threadSafeRefUnref):Referenced(threadSafeRefUnref),_dataVariance(UNSPECIFIED) {}
+        inline explicit Object(bool threadSafeRefUnref):Referenced(threadSafeRefUnref),_dataVariance(UNSPECIFIED),_userDataContainer(0) {}
 
         /** Copy constructor, optional CopyOp object can be used to control
           * shallow vs deep copying of dynamic data.*/
@@ -121,17 +122,17 @@ class OSG_EXPORT Object : public Referenced
 
 
         /** set the UserDataContainer object.*/
-        void setUserDataContainer(osg::Object* udc) { _userDataContainer = udc; }
+        void setUserDataContainer(osg::UserDataContainer* udc);
 
         /** get the UserDataContainer attached to this object.*/
-        osg::Object* getUserDataContainer() { return _userDataContainer.get(); }
+        osg::UserDataContainer* getUserDataContainer() { return _userDataContainer; }
 
         /** get the const UserDataContainer attached to this object.*/
-        const osg::Object* getUserDataContainer() const { return _userDataContainer.get(); }
+        const osg::UserDataContainer* getUserDataContainer() const { return _userDataContainer; }
 
         /** Convinience method that returns the UserDataContainer, and if one doesn't already exist creates and assigns
-         * one to the Object and then return this new UserDataContainer.*/
+         * a DefaultUserDataContainer to the Object and then return this new UserDataContainer.*/
-        osg::Object* getOrCreateUserDataContainer();
+        osg::UserDataContainer* getOrCreateUserDataContainer();
 
 
         /**
@@ -148,37 +149,6 @@ class OSG_EXPORT Object : public Referenced
         /** Get const user data.*/
         virtual const Referenced* getUserData() const;
         
-        /** Add user data object. Returns the index position of object added. */
-        virtual unsigned int addUserObject(Object* obj);
-
-         /** Add element to list of user data objects.*/
-        virtual void setUserObject(unsigned int i, Object* obj);
-
-        /** Remove element from the list of user data objects.*/
-        virtual void removeUserObject(unsigned int i);
-
-
-        /** Get user data object as specified index position. */
-        virtual Object* getUserObject(unsigned int i);
-
-        /** Get const user data object as specified index position. */
-        virtual const Object* getUserObject(unsigned int i) const;
-
-        /** Get number of user objects assigned to this object.*/
-        virtual unsigned int getNumUserObjects() const;
-
-        /** Get the index position of specified user data object.*/
-        virtual unsigned int getUserObjectIndex(const osg::Object* obj, unsigned int startPos=0) const;
-
-        /** Get the index position of first user data object that matches specified name.*/
-        virtual unsigned int getUserObjectIndex(const std::string& name, unsigned int startPos=0) const;
-
-        
-        /** Get first user data object with specified name. */
-        Object* getUserObject(const std::string& name, unsigned int startPos=0);
-
-        /** Get first const user data object with specified name. */
-        const Object* getUserObject(const std::string& name, unsigned int startPos=0) const;
 
 
         /** Convinience method that casts the named UserObject to osg::TemplateValueObject<T> and gets the value.
@@ -193,33 +163,6 @@ class OSG_EXPORT Object : public Referenced
         void setUserValue(const std::string& name, const T& value);
 
         
-        /** A vector of std::string's which are used to describe the object.*/
-        typedef std::vector<std::string> DescriptionList;
-
-        /** Set the list of string descriptions.*/
-        virtual void setDescriptions(const DescriptionList& descriptions);
-
-        /** Get the description list of the node.*/
-        virtual DescriptionList& getDescriptions();
-
-        /** Get the const description list of the const node.*/
-        virtual const DescriptionList& getDescriptions() const;
-
-
-        /** Get a single const description of the const node.*/
-        const std::string& getDescription(unsigned int i) const;
-
-        /** Get a single description of the node.*/
-        std::string& getDescription(unsigned int i);
-
-        /** Get the number of descriptions of the node.*/
-        unsigned int getNumDescriptions() const;
-
-        /** Add a description string to the node.*/
-        void addDescription(const std::string& desc);
-
-
-        
         /** Resize any per context GLObject buffers to specified size. */
         virtual void resizeGLObjectBuffers(unsigned int /*maxSize*/) {}
 
@@ -238,12 +181,12 @@ class OSG_EXPORT Object : public Referenced
             Nodes cannot be created on stack i.e Node node will not compile,
             forcing all nodes to be created on the heap i.e Node* node
             = new Node().*/
-        virtual ~Object() {}
+        virtual ~Object();
         
         std::string _name;
         DataVariance _dataVariance;
 
-        ref_ptr<osg::Object> _userDataContainer;
+        osg::UserDataContainer* _userDataContainer;
 
     private:
 

include/osg/UserDataContainer

@@ -28,7 +28,93 @@ class OSG_EXPORT UserDataContainer : public osg::Object
         UserDataContainer();
         UserDataContainer(const UserDataContainer& udc, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
 
-        META_Object(osg, UserDataContainer)
+        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const UserDataContainer*>(obj)!=0; }
+
+        /** return the name of the object's library. Must be defined
+            by derived classes. The OpenSceneGraph convention is that the
+            namespace of a library is the same as the library name.*/
+        virtual const char* libraryName() const { return "osg"; }
+
+        /** return the name of the object's class type. Must be defined
+            by derived classes.*/
+        virtual const char* className() const  { return "UserDataContainer"; }
+
+        /**
+         * Set user data, data must be subclassed from Referenced to allow
+         * automatic memory handling.  If your own data isn't directly
+         * subclassed from Referenced then create an adapter object
+         * which points to your own object and handles the memory addressing.
+         */
+        virtual void setUserData(Referenced* obj) = 0;
+
+        /** Get user data.*/
+        virtual Referenced* getUserData() = 0;
+
+        /** Get const user data.*/
+        virtual const Referenced* getUserData() const  = 0;
+
+        /** Add user data object. Returns the index position of object added. */
+        virtual unsigned int addUserObject(Object* obj)  = 0;
+
+         /** Add element to list of user data objects.*/
+        virtual void setUserObject(unsigned int i, Object* obj)  = 0;
+
+        /** Remove element from the list of user data objects.*/
+        virtual void removeUserObject(unsigned int i)  = 0;
+
+
+        /** Get user data object as specified index position. */
+        virtual Object* getUserObject(unsigned int i)  = 0;
+
+        /** Get const user data object as specified index position. */
+        virtual const Object* getUserObject(unsigned int i) const  = 0;
+
+        /** Get number of user objects assigned to this object.*/
+        virtual unsigned int getNumUserObjects() const  = 0;
+
+        /** Get the index position of specified user data object.*/
+        virtual unsigned int getUserObjectIndex(const osg::Object* obj, unsigned int startPos=0) const = 0;
+
+        /** Get the index position of first user data object that matches specified name.*/
+        virtual unsigned int getUserObjectIndex(const std::string& name, unsigned int startPos=0) const = 0;
+
+        
+        /** Get first user data object with specified name. */
+        virtual Object* getUserObject(const std::string& name, unsigned int startPos=0);
+
+        /** Get first const user data object with specified name. */
+        virtual const Object* getUserObject(const std::string& name, unsigned int startPos=0) const;
+
+
+        typedef std::vector<std::string> DescriptionList;
+
+        /** Set the list of string descriptions.*/
+        virtual void setDescriptions(const DescriptionList& descriptions) = 0;
+
+        /** Get the description list.*/
+        virtual DescriptionList& getDescriptions() = 0;
+
+        /** Get the const description list.*/
+        virtual const DescriptionList& getDescriptions() const = 0;
+
+        /** Get number of description strings.*/
+        virtual unsigned int getNumDescriptions() const = 0;
+
+        /** Add a description string.*/
+        virtual void addDescription(const std::string& desc) = 0;
+
+    protected:
+        virtual ~UserDataContainer() {}
+};
+
+/** Internal structure for storing all user data.*/
+class OSG_EXPORT DefaultUserDataContainer : public osg::UserDataContainer
+{
+    public:
+        DefaultUserDataContainer();
+        DefaultUserDataContainer(const DefaultUserDataContainer& udc, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
+
+        META_Object(osg, DefaultUserDataContainer)
 
 
         virtual void setThreadSafeRefUnref(bool threadSafe);
@@ -73,18 +159,26 @@ class OSG_EXPORT UserDataContainer : public osg::Object
         virtual unsigned int getUserObjectIndex(const std::string& name, unsigned int startPos=0) const;
 
 
+
+        
         /** Set the list of string descriptions.*/
         virtual void setDescriptions(const DescriptionList& descriptions);
 
-        /** Get the description list of the node.*/
+        /** Get the description list.*/
         virtual DescriptionList& getDescriptions();
 
-        /** Get the const description list of the const node.*/
+        /** Get the const description list.*/
         virtual const DescriptionList& getDescriptions() const;
 
+        /** Get number of description strings.*/
+        virtual unsigned int getNumDescriptions() const;
 
-    protected:
+        /** Add a description string.*/
-        virtual ~UserDataContainer() {}
+        virtual void addDescription(const std::string& desc);
+
+protected:
+
+        virtual ~DefaultUserDataContainer() {}
 
         typedef std::vector< osg::ref_ptr<osg::Object> > ObjectList;
 
@@ -93,7 +187,6 @@ class OSG_EXPORT UserDataContainer : public osg::Object
         ObjectList              _objectList;
 };
 
-
 }
 
 #endif

include/osg/ValueObject

@@ -15,6 +15,7 @@
 #define OSG_VALUEOBJECT 1
 
 #include <osg/Object>
+#include <osg/UserDataContainer>
 
 namespace osg {
 
@@ -171,7 +172,7 @@ template<typename T>
 bool osg::Object::getUserValue(const std::string& name, T& value) const
 {
     typedef TemplateValueObject<T> UserValueObject;
-    const UserValueObject* uvo = dynamic_cast<const UserValueObject*>(getUserObject(name));
+    const UserValueObject* uvo = _userDataContainer ? dynamic_cast<const UserValueObject*>(_userDataContainer->getUserObject(name)) : 0;
     if (uvo)
     {
         value = uvo->getValue();
@@ -189,9 +190,11 @@ void osg::Object::setUserValue(const std::string& name, const T& value)
 {
     typedef TemplateValueObject<T> UserValueObject;
 
-    unsigned int i = getUserObjectIndex(name);
+    getOrCreateUserDataContainer();
-    if (i<getNumUserObjects()) setUserObject(i, new UserValueObject(name,value));
+    
-    else addUserObject(new UserValueObject(name,value));
+    unsigned int i = _userDataContainer->getUserObjectIndex(name);
+    if (i<_userDataContainer->getNumUserObjects()) _userDataContainer->setUserObject(i, new UserValueObject(name,value));
+    else _userDataContainer->addUserObject(new UserValueObject(name,value));
 }
 
 }

src/osg/Node.cpp

@@ -17,6 +17,7 @@
 #include <osg/Notify>
 #include <osg/OccluderNode>
 #include <osg/Transform>
+#include <osg/UserDataContainer>
 
 #include <algorithm>
 
@@ -472,6 +473,51 @@ bool Node::containsOccluderNodes() const
     return _numChildrenWithOccluderNodes>0 || dynamic_cast<const OccluderNode*>(this);
 }
 
+void Node::setDescriptions(const DescriptionList& descriptions)
+{
+    getOrCreateUserDataContainer()->setDescriptions(descriptions);
+}
+
+Node::DescriptionList& Node::getDescriptions()
+{
+    return getOrCreateUserDataContainer()->getDescriptions();
+}
+
+static OpenThreads::Mutex s_mutex_StaticDescriptionList;
+static const Node::DescriptionList& getStaticDescriptionList()
+{
+    OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_StaticDescriptionList);
+    static Node::DescriptionList s_descriptionList;
+    return s_descriptionList;
+}
+
+const Node::DescriptionList& Node::getDescriptions() const
+{
+    if (_userDataContainer) return _userDataContainer->getDescriptions();
+    else return getStaticDescriptionList();
+}
+
+std::string& Node::getDescription(unsigned int i)
+{
+    return getOrCreateUserDataContainer()->getDescriptions()[i];
+}
+
+const std::string& Node::getDescription(unsigned int i) const
+{
+    if (_userDataContainer) return _userDataContainer->getDescriptions()[i];
+    else return getStaticDescriptionList()[i];
+}
+
+unsigned int Node::getNumDescriptions() const
+{
+    return _userDataContainer ? _userDataContainer->getDescriptions().size() : 0;
+}
+
+void Node::addDescription(const std::string& desc)
+{
+    getOrCreateUserDataContainer()->getDescriptions().push_back(desc);
+}
+
 BoundingSphere Node::computeBound() const
 {
     return BoundingSphere();

src/osg/Object.cpp

@@ -23,143 +23,66 @@ namespace osg
 Object::Object(const Object& obj,const CopyOp& copyop): 
     Referenced(),
     _name(obj._name),
-    _dataVariance(obj._dataVariance)
+    _dataVariance(obj._dataVariance),
+    _userDataContainer(0)
 {
-    if (obj._userDataContainer.valid())
+    if (obj._userDataContainer)
     {
         if (copyop.getCopyFlags()&osg::CopyOp::DEEP_COPY_USERDATA)
         {
-            _userDataContainer = obj.getUserDataContainer()->clone(copyop);
+            setUserDataContainer(osg::clone(obj._userDataContainer,copyop));
         }
         else
         {
-            _userDataContainer = obj._userDataContainer;
+            setUserDataContainer(obj._userDataContainer);
         }
     }
 }
 
+Object::~Object()
+{
+    if (_userDataContainer) _userDataContainer->unref();
+}
+
+
 void Object::setThreadSafeRefUnref(bool threadSafe)
 {
     Referenced::setThreadSafeRefUnref(threadSafe);
-    if (_userDataContainer.valid()) _userDataContainer->setThreadSafeRefUnref(threadSafe);
+    if (_userDataContainer) _userDataContainer->setThreadSafeRefUnref(threadSafe);
 }
 
-osg::Object* Object::getOrCreateUserDataContainer()
+void Object::setUserDataContainer(osg::UserDataContainer* udc)
 {
-    if (!_userDataContainer) _userDataContainer = new UserDataContainer();
+    if (_userDataContainer == udc) return;
-    return _userDataContainer.get();
+    
+    if (_userDataContainer) _userDataContainer->unref();
+    
+    _userDataContainer = udc;
+    
+    if (_userDataContainer) _userDataContainer->ref();
+}
+
+osg::UserDataContainer* Object::getOrCreateUserDataContainer()
+{
+    if (!_userDataContainer) setUserDataContainer(new DefaultUserDataContainer());
+    return _userDataContainer;
 }
 
 void Object::setUserData(Referenced* obj)
 {
+    if (getUserData()==obj) return;
+    
     getOrCreateUserDataContainer()->setUserData(obj);
 }
 
 Referenced* Object::getUserData()
 {
-    return _userDataContainer.valid() ? _userDataContainer->getUserData() : 0;
+    return _userDataContainer ? _userDataContainer->getUserData() : 0;
 }
 
 const Referenced* Object::getUserData() const
 {
-    return _userDataContainer.valid() ? _userDataContainer->getUserData() : 0;
+    return _userDataContainer ? _userDataContainer->getUserData() : 0;
-}
-
-unsigned int Object::addUserObject(Object* obj)
-{
-    // make sure the UserDataContainer exists
-    return getOrCreateUserDataContainer()->addUserObject(obj);
-}
-
-void Object::removeUserObject(unsigned int i)
-{
-    if (_userDataContainer.valid()) _userDataContainer->removeUserObject(i);
-}
-
-void Object::setUserObject(unsigned int i, Object* obj)
-{
-    // make sure the UserDataContainer exists
-    getOrCreateUserDataContainer()->setUserObject(i,obj);
-}
-
-Object* Object::getUserObject(unsigned int i)
-{
-    return _userDataContainer.valid() ? _userDataContainer->getUserObject(i) : 0;
-}
-
-const Object* Object::getUserObject(unsigned int i) const
-{
-    return _userDataContainer.valid() ? _userDataContainer->getUserObject(i) : 0;
-}
-
-unsigned int Object::getNumUserObjects() const
-{
-    return _userDataContainer.valid() ? _userDataContainer->getNumUserObjects() : 0;
-}
-
-unsigned int Object::getUserObjectIndex(const osg::Object* obj, unsigned int startPos) const
-{
-    return _userDataContainer.valid() ? _userDataContainer->getUserObjectIndex(obj, startPos) : 0;
-}
-
-unsigned int Object::getUserObjectIndex(const std::string& name, unsigned int startPos) const
-{
-    return _userDataContainer.valid() ? _userDataContainer->getUserObjectIndex(name, startPos) : 0;
-}
-
-Object* Object::getUserObject(const std::string& name, unsigned int startPos)
-{
-     return getUserObject(getUserObjectIndex(name, startPos));
-}
-
-const Object* Object::getUserObject(const std::string& name, unsigned int startPos) const
-{
-     return getUserObject(getUserObjectIndex(name, startPos));
-}
-
-void Object::setDescriptions(const DescriptionList& descriptions)
-{
-    getOrCreateUserDataContainer()->setDescriptions(descriptions);
-}
-
-Object::DescriptionList& Object::getDescriptions()
-{
-    return getOrCreateUserDataContainer()->getDescriptions();
-}
-
-static OpenThreads::Mutex s_mutex_StaticDescriptionList;
-static const Object::DescriptionList& getStaticDescriptionList()
-{
-    OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_StaticDescriptionList);
-    static Object::DescriptionList s_descriptionList;
-    return s_descriptionList;
-}
-
-const Object::DescriptionList& Object::getDescriptions() const
-{
-    if (_userDataContainer.valid()) return _userDataContainer->getDescriptions();
-    else return getStaticDescriptionList();
-}
-
-std::string& Object::getDescription(unsigned int i)
-{
-    return getOrCreateUserDataContainer()->getDescriptions()[i];
-}
-
-const std::string& Object::getDescription(unsigned int i) const
-{
-    if (_userDataContainer.valid()) return _userDataContainer->getDescriptions()[i];
-    else return getStaticDescriptionList()[i];
-}
-
-unsigned int Object::getNumDescriptions() const
-{
-    return _userDataContainer.valid() ? _userDataContainer->getDescriptions().size() : 0;
-}
-
-void Object::addDescription(const std::string& desc)
-{
-    getOrCreateUserDataContainer()->getDescriptions().push_back(desc);
 }
 
 } // end of namespace osg

src/osg/UserDataContainer.cpp

@@ -26,12 +26,35 @@ UserDataContainer::UserDataContainer():
 
 UserDataContainer::UserDataContainer(const UserDataContainer& udc, const osg::CopyOp& copyop):
     Object(udc, copyop)
+{
+}
+
+Object* UserDataContainer::getUserObject(const std::string& name, unsigned int startPos)
+{
+     return getUserObject(getUserObjectIndex(name, startPos));
+}
+
+const Object* UserDataContainer::getUserObject(const std::string& name, unsigned int startPos) const
+{
+     return getUserObject(getUserObjectIndex(name, startPos));
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// DefaultUserDataContainer
+//
+DefaultUserDataContainer::DefaultUserDataContainer()
+{
+}
+
+DefaultUserDataContainer::DefaultUserDataContainer(const DefaultUserDataContainer& udc, const osg::CopyOp& copyop):
+    UserDataContainer(udc, copyop)
 {
     _userData = udc._userData;
     _descriptionList = udc._descriptionList;
 }
 
-void UserDataContainer::setThreadSafeRefUnref(bool threadSafe)
+void DefaultUserDataContainer::setThreadSafeRefUnref(bool threadSafe)
 {
     Object::setThreadSafeRefUnref(threadSafe);
 
@@ -45,22 +68,22 @@ void UserDataContainer::setThreadSafeRefUnref(bool threadSafe)
     }
 }
 
-void UserDataContainer::setUserData(Referenced* obj)
+void DefaultUserDataContainer::setUserData(Referenced* obj)
 {
     _userData = obj;
 }
 
-Referenced* UserDataContainer::getUserData()
+Referenced* DefaultUserDataContainer::getUserData()
 {
     return _userData.get();
 }
 
-const Referenced* UserDataContainer::getUserData() const
+const Referenced* DefaultUserDataContainer::getUserData() const
 {
     return _userData.get();
 }
 
-unsigned int UserDataContainer::addUserObject(Object* obj)
+unsigned int DefaultUserDataContainer::addUserObject(Object* obj)
 {
     // make sure that the object isn't already in the container
     unsigned int i = getUserObjectIndex(obj);
@@ -78,7 +101,7 @@ unsigned int UserDataContainer::addUserObject(Object* obj)
     return pos;
 }
 
-void UserDataContainer::removeUserObject(unsigned int i)
+void DefaultUserDataContainer::removeUserObject(unsigned int i)
 {
     if (i<_objectList.size())
     {
@@ -86,7 +109,7 @@ void UserDataContainer::removeUserObject(unsigned int i)
     }
 }
 
-void UserDataContainer::setUserObject(unsigned int i, Object* obj)
+void DefaultUserDataContainer::setUserObject(unsigned int i, Object* obj)
 {
     if (i<_objectList.size())
     {
@@ -94,7 +117,7 @@ void UserDataContainer::setUserObject(unsigned int i, Object* obj)
     }
 }
 
-Object* UserDataContainer::getUserObject(unsigned int i)
+Object* DefaultUserDataContainer::getUserObject(unsigned int i)
 {
     if (i<_objectList.size())
     {
@@ -103,7 +126,7 @@ Object* UserDataContainer::getUserObject(unsigned int i)
     return 0;
 }
 
-const Object* UserDataContainer::getUserObject(unsigned int i) const
+const Object* DefaultUserDataContainer::getUserObject(unsigned int i) const
 {
     if (i<_objectList.size())
     {
@@ -112,12 +135,12 @@ const Object* UserDataContainer::getUserObject(unsigned int i) const
     return 0;
 }
 
-unsigned int UserDataContainer::getNumUserObjects() const
+unsigned int DefaultUserDataContainer::getNumUserObjects() const
 {
     return _objectList.size();
 }
 
-unsigned int UserDataContainer::getUserObjectIndex(const osg::Object* obj, unsigned int startPos) const
+unsigned int DefaultUserDataContainer::getUserObjectIndex(const osg::Object* obj, unsigned int startPos) const
 {
     for(unsigned int i = startPos; i < _objectList.size(); ++i)
     {
@@ -126,7 +149,7 @@ unsigned int UserDataContainer::getUserObjectIndex(const osg::Object* obj, unsig
     return _objectList.size();
 }
 
-unsigned int UserDataContainer::getUserObjectIndex(const std::string& name, unsigned int startPos) const
+unsigned int DefaultUserDataContainer::getUserObjectIndex(const std::string& name, unsigned int startPos) const
 {
     for(unsigned int i = startPos; i < _objectList.size(); ++i)
     {
@@ -136,21 +159,29 @@ unsigned int UserDataContainer::getUserObjectIndex(const std::string& name, unsi
     return _objectList.size();
 }
 
-void UserDataContainer::setDescriptions(const DescriptionList& descriptions)
+void DefaultUserDataContainer::setDescriptions(const DescriptionList& descriptions)
 {
     _descriptionList = descriptions;
 }
 
-Object::DescriptionList& UserDataContainer::getDescriptions()
+UserDataContainer::DescriptionList& DefaultUserDataContainer::getDescriptions()
 {
     return _descriptionList;
 }
 
-const Object::DescriptionList& UserDataContainer::getDescriptions() const
+const UserDataContainer::DescriptionList& DefaultUserDataContainer::getDescriptions() const
 {
     return _descriptionList;
 }
 
+unsigned int DefaultUserDataContainer::getNumDescriptions() const
+{
+    return _descriptionList.size();
+}
 
+void DefaultUserDataContainer::addDescription(const std::string& desc)
+{
+    _descriptionList.push_back(desc);
+}
 
 } // end of namespace osg

src/osgWrappers/serializers/osg/Object.cpp

@@ -1,4 +1,5 @@
 #include <osg/Object>
+#include <osg/UserDataContainer>
 #include <osgDB/ObjectWrapper>
 #include <osgDB/InputStream>
 #include <osgDB/OutputStream>
@@ -45,6 +46,6 @@ REGISTER_OBJECT_WRAPPER( Object,
     UPDATE_TO_VERSION( 77 )
     {
         REMOVE_SERIALIZER( UserData );
-        ADD_OBJECT_SERIALIZER( UserDataContainer, osg::Object, NULL );
+        ADD_OBJECT_SERIALIZER( UserDataContainer, osg::UserDataContainer, NULL );
     }
 }

src/osgWrappers/serializers/osg/UserDataContainer.cpp

@@ -4,12 +4,12 @@
 #include <osgDB/InputStream>
 #include <osgDB/OutputStream>
 
-static bool checkUDC_UserData( const osg::UserDataContainer& udc )
+static bool checkUDC_UserData( const osg::DefaultUserDataContainer& udc )
 {
     return dynamic_cast<const osg::Object*>(udc.getUserData())!=0;
 }
 
-static bool readUDC_UserData( osgDB::InputStream& is, osg::UserDataContainer& udc )
+static bool readUDC_UserData( osgDB::InputStream& is, osg::DefaultUserDataContainer& udc )
 {
     is >> osgDB::BEGIN_BRACKET;
     osg::Object* object = is.readObject();
@@ -18,7 +18,7 @@ static bool readUDC_UserData( osgDB::InputStream& is, osg::UserDataContainer& ud
     return true;
 }
 
-static bool writeUDC_UserData( osgDB::OutputStream& os, const osg::UserDataContainer& udc )
+static bool writeUDC_UserData( osgDB::OutputStream& os, const osg::DefaultUserDataContainer& udc )
 {
     os << osgDB::BEGIN_BRACKET << std::endl;
     os.writeObject(dynamic_cast<const osg::Object*>(udc.getUserData()));
@@ -27,12 +27,12 @@ static bool writeUDC_UserData( osgDB::OutputStream& os, const osg::UserDataConta
 }
 
 // _descriptions
-static bool checkUDC_Descriptions( const osg::UserDataContainer& udc )
+static bool checkUDC_Descriptions( const osg::DefaultUserDataContainer& udc )
 {
     return udc.getNumDescriptions()>0;
 }
 
-static bool readUDC_Descriptions( osgDB::InputStream& is, osg::UserDataContainer& udc )
+static bool readUDC_Descriptions( osgDB::InputStream& is, osg::DefaultUserDataContainer& udc )
 {
     unsigned int size = is.readSize(); is >> osgDB::BEGIN_BRACKET;
     for ( unsigned int i=0; i<size; ++i )
@@ -45,11 +45,11 @@ static bool readUDC_Descriptions( osgDB::InputStream& is, osg::UserDataContainer
     return true;
 }
 
-static bool writeUDC_Descriptions( osgDB::OutputStream& os, const osg::UserDataContainer& udc )
+static bool writeUDC_Descriptions( osgDB::OutputStream& os, const osg::DefaultUserDataContainer& udc )
 {
-    const osg::Object::DescriptionList& slist = udc.getDescriptions();
+    const osg::UserDataContainer::DescriptionList& slist = udc.getDescriptions();
     os.writeSize(slist.size()); os << osgDB::BEGIN_BRACKET << std::endl;
-    for ( osg::Object::DescriptionList::const_iterator itr=slist.begin();
+    for ( osg::UserDataContainer::DescriptionList::const_iterator itr=slist.begin();
           itr!=slist.end(); ++itr )
     {
         os.writeWrappedString( *itr );
@@ -60,12 +60,12 @@ static bool writeUDC_Descriptions( osgDB::OutputStream& os, const osg::UserDataC
 }
 
 
-static bool checkUDC_UserObjects( const osg::UserDataContainer& udc )
+static bool checkUDC_UserObjects( const osg::DefaultUserDataContainer& udc )
 {
     return udc.getNumUserObjects()>0;
 }
 
-static bool readUDC_UserObjects( osgDB::InputStream& is, osg::UserDataContainer& udc )
+static bool readUDC_UserObjects( osgDB::InputStream& is, osg::DefaultUserDataContainer& udc )
 {
     unsigned int size = is.readSize(); is >> osgDB::BEGIN_BRACKET;
     for( unsigned int i=0; i<size; ++i )
@@ -77,7 +77,7 @@ static bool readUDC_UserObjects( osgDB::InputStream& is, osg::UserDataContainer&
     return true;
 }
 
-static bool writeUDC_UserObjects( osgDB::OutputStream& os, const osg::UserDataContainer& udc )
+static bool writeUDC_UserObjects( osgDB::OutputStream& os, const osg::DefaultUserDataContainer& udc )
 {
     unsigned int numObjects = udc.getNumUserObjects();
     os.writeSize(numObjects); os << osgDB::BEGIN_BRACKET << std::endl;
@@ -90,13 +90,25 @@ static bool writeUDC_UserObjects( osgDB::OutputStream& os, const osg::UserDataCo
 }
 
 
-
+namespace UserDataContainerNamespace
-REGISTER_OBJECT_WRAPPER( UserDataContainer,
+{
-                         new osg::UserDataContainer,
+    REGISTER_OBJECT_WRAPPER( UserDataContainer,
+                            0,
                             osg::UserDataContainer,
                             "osg::Object osg::UserDataContainer" )
+    {
+    }
+}
+
+namespace DefaultUserDataContainerNamespace
 {
+    REGISTER_OBJECT_WRAPPER( DefaultUserDataContainer,
+                            new osg::DefaultUserDataContainer,
+                            osg::DefaultUserDataContainer,
+                            "osg::Object osg::UserDataContainer osg::DefaultUserDataContainer" )
+    {
         ADD_USER_SERIALIZER( UDC_UserData );  // _userData
         ADD_USER_SERIALIZER( UDC_Descriptions );  // _descriptions
         ADD_USER_SERIALIZER( UDC_UserObjects );  // _userData
+    }
 }