axmol/core/base/ObjectFactory.cpp

/****************************************************************************
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

https://axmolengine.github.io/

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#include <functional>
#include "base/ObjectFactory.h"

NS_AX_BEGIN

ObjectFactory::TInfo::TInfo() : _class(""), _fun(nullptr), _func(nullptr) {}

ObjectFactory::TInfo::TInfo(std::string_view type, Instance ins) : _class(type), _fun(ins), _func(nullptr)
{
    ObjectFactory::getInstance()->registerType(*this);
}

ObjectFactory::TInfo::TInfo(std::string_view type, InstanceFunc ins) : _class(type), _fun(nullptr), _func(ins)
{
    ObjectFactory::getInstance()->registerType(*this);
}

ObjectFactory::TInfo::TInfo(const TInfo& t)
{
    _class = t._class;
    _fun   = t._fun;
    _func  = t._func;
}

ObjectFactory::TInfo::~TInfo()
{
    _class = "";
    _fun   = nullptr;
    _func  = nullptr;
}

ObjectFactory::TInfo& ObjectFactory::TInfo::operator=(const TInfo& t)
{
    _class = t._class;
    _fun   = t._fun;
    _func  = t._func;
    return *this;
}

ObjectFactory* ObjectFactory::_sharedFactory = nullptr;

ObjectFactory::ObjectFactory() {}

ObjectFactory::~ObjectFactory()
{
    _typeMap.clear();
}

ObjectFactory* ObjectFactory::getInstance()
{
    if (nullptr == _sharedFactory)
    {
        _sharedFactory = new ObjectFactory();
    }
    return _sharedFactory;
}

void ObjectFactory::destroyInstance()
{
    AX_SAFE_DELETE(_sharedFactory);
}

Ref* ObjectFactory::createObject(std::string_view name)
{
    Ref* o = nullptr;
    do
    {
        // const TInfo t = _typeMap[name.data];
        auto it = _typeMap.find(name);
        if (it == _typeMap.end())
            break;
        auto& t = it->second;
        if (t._fun != nullptr)
        {
            o = t._fun();
        }
        else if (t._func != nullptr)
        {
            o = t._func();
        }
    } while (0);

    return o;
}

void ObjectFactory::registerType(const TInfo& t)
{
    _typeMap.emplace(t._class, t);
}

NS_AX_END