Breaking: #101327 - Harden FileInterface::getSize()

See forge#101327

Description

A return type declaration has been added to method stub \TYPO3\CMS\Core\Resource\FileInterface::getSize(). As a consequence, implementations of said method, \TYPO3\CMS\Core\Resource\AbstractFile::getSize() and \TYPO3\CMS\Core\Resource\FileReference::getSize() received return type declarations as well.

Also, \TYPO3\CMS\Core\Resource\AbstractFile::getSize() has been adjusted to actually just return integer. It formerly returned null if the actual size could not be gathered. It now returns 0 in that case.

Impact

Code, that calls \TYPO3\CMS\Core\Resource\AbstractFile::getSize() through derivatives like \TYPO3\CMS\Core\Resource\File::getSize() might be adjusted to not respect null any more.

Implementations (classes) that implement \TYPO3\CMS\Core\Resource\FileInterface, have to adjust the return type of method getSize() to match the contract.

Affected installations

Installations that implement \TYPO3\CMS\Core\Resource\FileInterface or that call \TYPO3\CMS\Core\Resource\FileInterface::getSize() via derivatives.

Migration

Adjust the return type and possible null checks.