ContentArray.h

/*
 * Copyright (C) 2025, Robert Patterson
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#pragma once
 
#include "BaseTypes.h"
 
namespace mnx {
 
template <typename BaseContentT>
class ContentArray : public Array<BaseContentT>
{
public:
    using BaseArray = Array<BaseContentT>;     
    using BaseArray::BaseArray;  // Inherit constructors
 
    template <typename T, std::enable_if_t<std::is_base_of_v<BaseContentT, T>, int> = 0>
    [[nodiscard]] T get(size_t index) const
    {
        this->checkIndex(index);
        return this->operator[](index).template get<T>();
    }
 
    // Prevent inherited Array::append(...) overloads from being used on content arrays.
    BaseContentT append(...) = delete;
 
protected:
    template <typename T, typename... Args>
    T appendWithType(Args&&... args)
    {
        static_assert(std::is_base_of_v<BaseContentT, T>,
                      "ContentArray::appendWithType requires a compatible content base type.");
        auto result = BaseArray::template append<T>(std::forward<Args>(args)...);
        const BaseContentT& contentObject = result;
        if (T::ContentTypeValue != contentObject.defaultType()) {
            result.set_type(std::string(T::ContentTypeValue));
        }
        return result;
    }
 
    template <typename T, std::enable_if_t<std::is_base_of_v<BaseContentT, T>, int> = 0>
    [[nodiscard]] T getTypedObject(size_t index) const
    {
        this->checkIndex(index);
        auto element = (*this)[index];
        if (element.type() != T::ContentTypeValue) {
            throw std::invalid_argument("Type mismatch: expected " + std::string(T::ContentTypeValue) +
                                        ", got " + element.type());
        }
        return T(this->root(), this->pointer() / std::to_string(index));
    }
};
 
} // namespace mnx