src/engine/EntityTemplateTable.h

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#ifndef ENTITYTEMPLATETABLE_H
#define ENTITYTEMPLATETABLE_H

#include <boost/shared_ptr.hpp>
#include "EntityInstance.h"
#include "TemplateTable.h"
#include "EntityTemplate.h"
#include "BehaviorTemplateTable.h"
#include "LibraryEntities.h"
#include "util/Error.h"

namespace green
{
        class EntityTemplateTable : public TemplateTable
        {
                protected:
                        BehaviorTemplateTablePtr mBehaviorTemplates;
                                                
                public:
                        
                        Key AddEntry(const Name& name, EntityTemplatePtr entry)
                        {
                                CHECK_SHARED(entry);
                                return TemplateTable::AddEntry(name, entry);
                        }
                        
                        void SetBehaviorTemplateTable(BehaviorTemplateTablePtr behaviors) {
                                CHECK_SHARED(behaviors);
                                mBehaviorTemplates = behaviors;
                        }

                        EntityInstancePtr
                                        Instantiate(Key key, ArgListPtr initArgs) const
                        {
                                CHECK_SHARED(initArgs);
                                EntityTemplatePtr entry = ENTITY_TEMPLATE_CAST(
                                                this->_checkInstArgs(key, initArgs));
                                
                                CHECK_SHARED(entry);
                                
                                // create a new instance with entry as its template
                                EntityInstancePtr instance(new EntityInstance(key, entry, mBehaviorTemplates));
                                instance->SetTemplate(key);
                                
                                // now fill in the default values and such from the template
                                this->_doInstantiate(instance, entry, initArgs);
                                
                                // and return the instance
                                return instance;
                        
                        }
                                
        };
        typedef boost::shared_ptr<EntityTemplateTable> EntityTemplateTablePtr;
        #define ENTITY_TEMPLATE_TABLE_CAST(x) boost::dynamic_pointer_cast<EntityTemplateTable>(x)
}

#endif

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