/*! Callback called for each element in an AttachmentMap (this is used by
    preWriteAttachmentMapField).
 */
void OSBCommonElement::handleAttachmentMapElementPreWrite(
    FieldContainer *refedFC)
{
    OSG_OSB_LOG(("OSBCommonElement::handleAttachmentMapElementPreWrite\n"));

    if(refedFC == NULL)
        return;

    Attachment *refedAtt = dynamic_cast<Attachment *>(refedFC);

    // skip attachments marked as 'internal'
    if(refedAtt                              == NULL ||
       refedAtt->getSFInternal()->getValue() == true   )
    {
        return;
    }

    OSBRootElement    *root     = editRoot();
    UInt32             refedId  = refedAtt->getId  ();
    const std::string &typeName = refedAtt->getType().getName();

    // only schedule a container once
    if(root->getIdSet().count(refedId) > 0)
        return;

    OSBElementBase *elem = OSBElementFactory::the()->acquire(typeName, root);

    root->editIdSet      ().insert   (refedId);
    root->editElementList().push_back(elem   );
    elem->setContainer(refedAtt);
    elem->preWrite    (refedAtt);
}
/*! Fills the "pointer field" described by \a ptrField with the correct
    pointers.

    \param[in] ptrField Field to fill.
 */
void
OSBRootElement::mapPtrField(const PtrFieldInfo &ptrField)
{
    OSG_OSB_LOG(("OSBRootElement::mapPtrField\n"));

    PtrFieldInfo::PtrIdStoreConstIt   idIt       = ptrField.beginIdStore();
    PtrFieldInfo::PtrIdStoreConstIt   idEnd      = ptrField.endIdStore  ();

    PtrFieldInfo::BindingStoreConstIt bindingIt  = ptrField.beginBindingStore();
    PtrFieldInfo::BindingStoreConstIt bindingEnd = ptrField.endBindingStore  ();

    const FieldContainerIdMap        &idMap      = getIdMap();
          FieldContainerIdMapConstIt  idMapIt;
          FieldContainerIdMapConstIt  idMapEnd   = idMap.end();
        
    if(bindingIt != bindingEnd)
    {
        if(ptrField.getHandledField() == true)
        {
            FieldContainer    *fieldCon = ptrField.getContainer();
            UInt32             fieldId  = ptrField.getFieldId();
        
            EditFieldHandlePtr fHandle  = fieldCon->editField(fieldId);

            EditMapFieldHandlePtr sfMapField =
                boost::dynamic_pointer_cast<EditMapFieldHandle>(fHandle);

            if(sfMapField == NULL || sfMapField->isValid() == false)
                return;

            sfMapField->fillFrom(ptrField.getBindingStore(),
                                 ptrField.getIdStore     (),
                                 idMap);
        }
        else
        {
            Attachment          *att    = NULL;
            AttachmentContainer *attCon =
                dynamic_cast<AttachmentContainer *>(ptrField.getContainer());
            
            for(; (idIt != idEnd) && (bindingIt != bindingEnd); ++idIt, 
                                                                ++bindingIt)
            {
                if(*idIt != 0)
                {
                    idMapIt = idMap.find(*idIt);
                    
                    if(idMapIt != idMapEnd)
                    {
                        att = dynamic_cast<Attachment *>(
                            FieldContainerFactory::the()->getContainer(
                                idMapIt->second));
                    }
                    else
                    {
                        FWARNING(("OSBRootElement::mapPtrField: could not find "
                                  "FieldContainer with id [%u]\n", *idIt));
                        att = NULL;
                    }
                }
                else
                {
                    att = NULL;
                }
                
                if(att != NULL)
                {
                    OSG_OSB_LOG(("OSBRootElement::mapPtrField: adding "
                            "attchment [%u] [%u]\n",
                            att->getType().getGroupId(), *bindingIt));
                }

                attCon->addAttachment(att, *bindingIt);
            }
        }
    }
    else
    {
        FieldContainer    *fc       = NULL;
        FieldContainer    *fieldCon = ptrField.getContainer();
        UInt32             fieldId  = ptrField.getFieldId();
        
        EditFieldHandlePtr fHandle  = fieldCon->editField(fieldId);
        
        FieldContainerPtrSFieldBase::EditHandlePtr pSFHandle = 
            boost::dynamic_pointer_cast<
                FieldContainerPtrSFieldBase::EditHandle>(fHandle);
            
        FieldContainerPtrMFieldBase::EditHandlePtr pMFHandle = 
            boost::dynamic_pointer_cast<
                FieldContainerPtrMFieldBase::EditHandle>(fHandle);
        
        for(; idIt != idEnd; ++idIt)
        {
            if(*idIt != 0)
            {
                idMapIt = idMap.find(*idIt);
                
                if(idMapIt != idMapEnd)
                {
                    fc = FieldContainerFactory::the()->getContainer(
                        idMapIt->second);
                }
                else
                {
                    FWARNING(("OSBRootElement::mapPtrField: could not find "
                              "FieldContainer with (file) id [%u]\n", *idIt));
                    fc = NULL;
                }
            }
            else
            {
                fc = NULL;
            }

            if(pSFHandle != NULL && pSFHandle->isValid())
            {
                pSFHandle->set(fc);
            }
            else if(pMFHandle != NULL && pMFHandle->isValid())
            {
                pMFHandle->add(fc);
            }
            else
            {
                FWARNING(("OSBRootElement::mapPtrField: FieldHandles invalid, "
                          "can not set pointer - target fc [%u][%s] "
                          "fieldId [%u][%s] file id [%u] system id [%u]\n",
                          (fc != NULL ? fc->getId() : 0),
                          (fc != NULL ? fc->getType().getCName() : ""),
                          fieldId,
                          (fc != NULL ?
                          fc->getType().getFieldDesc(fieldId)->getCName() : ""),
                          *idIt,
                          (idMapIt != idMapEnd ? idMapIt->second : 0) ));
            }
        }
    }
}