property.h

/*
 * Copyright 2016 Ophidian
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
 */

#ifndef OPHIDIAN_SRC_ENTITY_SYSTEM_PROPERTY_H
#define OPHIDIAN_SRC_ENTITY_SYSTEM_PROPERTY_H

#include "entity.h"

namespace ophidian{
namespace entity_system{


class property {
    friend class attorney;
public:
    property() {}
    virtual ~property() { }

private:

    virtual void destroy( entity_index e ) = 0;


    virtual void create( ) = 0;


    virtual void preallocate( std::size_t qnt ) = 0;

};

/*
 * This class provides three static functions to access private methods from properties.
 */
class attorney {
private:
    inline static void destroy(property & p, entity_index e) {
        return p.destroy(e);
    }
    inline static void create(property & p) {
        return p.create();
    }
    inline static void preallocate(property & p, size_t qnt) {
        return p.preallocate(qnt);
    }
    friend class entity_system;
};

} /* namespace entity system */
} /* namespace ophidian */

#endif //OPHIDIAN_SRC_ENTITY_SYSTEM_PROPERTY_H