TypeTransitionManager.php

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<?php
namespace Magento\Catalog\Model\Product;

use Magento\Catalog\Model\Product;
use Magento\Catalog\Model\Product\Type;

class TypeTransitionManager
{
    protected $compatibleTypes;

    protected $weightResolver;

    public function __construct(
        \Magento\Catalog\Model\Product\Edit\WeightResolver $weightResolver,
        array $compatibleTypes
    ) {
        $this->compatibleTypes = $compatibleTypes;
        $this->weightResolver = $weightResolver;
    }

    public function processProduct(Product $product)
    {
        if (in_array($product->getTypeId(), $this->compatibleTypes)) {
            $product->setTypeInstance(null);
            $productTypeId = $this->weightResolver->resolveProductHasWeight($product)
                ? Type::TYPE_SIMPLE
                : Type::TYPE_VIRTUAL;
            $product->setTypeId($productTypeId);
        }
    }
}