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I am working on migrating an extension from Magento 1.9 to Magento 2.

I want to know about the class migration followed between Magento 1.x to Magento 2.

Can anyone please help me in tracing the class-mapping followed in Magento 2 from Magento 1?

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Up to now, there is no exact place to find list the ( in web )

But you can identify the Classes declaration and naming convention like

Core Classes

vendor\magento\framework\

For example, Varien_Object in Magento 1 is equivalent to \Magento\Framework\DataObject

Modules

vendor\magento\module-catalog   (vendor name/module name - Magento_Catalog)

Also in the Magento 2, there are a set of classes that are generated automatically and stored in var/generation

Lib

root\lib

Frameworks

vendor/zendframework
vendor/ symfony

To find the exact class , you can go by naming convention in Magento 2 or use grep -i -n -r "string" /var/related folder ( Ubuntu ) for exact search.

Hope this helps.

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