cafChildArrayFieldAccessor.h

// ##################################################################################################
//
//    Caffa
//    Copyright (C) 2022- Kontur AS
//
//    GNU Lesser General Public License Usage
//    This library is free software; you can redistribute it and/or modify
//    it under the terms of the GNU Lesser General Public License as published by
//    the Free Software Foundation; either version 2.1 of the License, or
//    (at your option) any later version.
//
//    This library is distributed in the hope that it will be useful, but WITHOUT ANY
//    WARRANTY; without even the implied warranty of MERCHANTABILITY or
//    FITNESS FOR A PARTICULAR PURPOSE.
//
//    See the GNU Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
//    for more details.
//
#pragma once
 
#include "cafAssert.h"
#include "cafObjectHandle.h"
 
#include <algorithm>
#include <memory>
#include <optional>
#include <vector>
 
namespace caffa
{
class FieldHandle;
class ObjectHandle;
 
class ChildArrayFieldAccessor
{
public:
    ChildArrayFieldAccessor( FieldHandle* field )
        : m_field( field )
    {
    }
    virtual ~ChildArrayFieldAccessor()                          = default;
    virtual size_t                              size() const    = 0;
    virtual void                                clear()         = 0;
    virtual std::vector<ObjectHandle::Ptr>      objects()       = 0;
    virtual std::vector<ObjectHandle::ConstPtr> objects() const = 0;
 
    virtual ObjectHandle::Ptr at( size_t index ) const                          = 0;
    virtual void              insert( size_t index, ObjectHandle::Ptr pointer ) = 0;
    virtual void              push_back( ObjectHandle::Ptr pointer )            = 0;
    virtual size_t            index( ObjectHandle::ConstPtr pointer ) const     = 0;
    virtual void              remove( size_t index )                            = 0;
 
protected:
    FieldHandle* m_field;
};
 
class ChildArrayFieldDirectStorageAccessor : public ChildArrayFieldAccessor
{
public:
    ChildArrayFieldDirectStorageAccessor( FieldHandle* field );
    ~ChildArrayFieldDirectStorageAccessor() override;
 
    size_t                              size() const override;
    void                                clear() override;
    std::vector<ObjectHandle::Ptr>      objects() override;
    std::vector<ObjectHandle::ConstPtr> objects() const override;
    ObjectHandle::Ptr                   at( size_t index ) const override;
    void                                insert( size_t index, ObjectHandle::Ptr pointer ) override;
    void                                push_back( ObjectHandle::Ptr pointer ) override;
    size_t                              index( ObjectHandle::ConstPtr object ) const override;
    virtual void                        remove( size_t index ) override;
 
private:
    std::vector<ObjectHandle::Ptr> m_pointers;
};
 
} // namespace caffa