[6.0] Removing Adapter and AdapterInstance classes

[Hackwar]

Summary of Changes

This PR removes the deprecated classes Adapter and AdapterInstance. It depends on #43792 and #43793. Those PRs remove the dependency on these classes. Thus this PR can only be merged when those 2 have been merged.

Testing Instructions

Codereview.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org: CMS Adapter removed Manual#301

• No documentation changes for manual.joomla.org needed

[laoneo]

Can they be moved to the compat plugin instead and then remove in 7?

[Hackwar]

These classes have been broken sind Joomla 1.5 and have been deprecated since Joomla 4.3. It is impossible to use them without mostly re-implementing them entirely in your own class. There is NO code out there, which can use these classes. There is no gain whatsoever in keeping them.

[exlemor]

I have tested this item ✅ successfully on 933e78d

I have successfully confirmed that those 2 files are deleted and the change to the file plugins/behaviour/compat6/src/classmap/classmap.php have been made in the Download package.

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43794.}

[muhme]

I have tested this item ✅ successfully on 933e78d

Tested with JBT and current 6.0-dev

• Enable 'Behaviour - Backward Compatibility 6' plugin and set 'Classes Aliases' Yes
• Create override: administrator backend -> System -> Site Templates -> Cassiopeia Details and Files -> Create Overrides -> com_content -> article
  • See 'Override created in /templates/cassiopeia/html/com_content/article'
• Edit templates/cassiopeia/html/com_content/article/default.php file in inserting following lines after last use line 23:

  echo "Overwrite is used";
  new JAdapter(null, __DIR__, 'Test');
  class MyTestAdapter extends JAdapterInstance
  {
  }
  

• Create an article and show the single article, it must containt Overwrite is used and should work
• Installed this PR
  • ✅ Checked libraries/src/Adapter/AdapterInstance.php and libraries/src/Adapter/Adapter.php are deleted
  • ✅ Checked AdapterInstance and Adapter are removed from plugins/behaviour/compat6/src/classmap/classmap.php
  • ✅ Article view fails with Class "JAdapter" not found even if 'Behaviour - Backward Compatibility 6' plugin is enabled and 'Classes Aliases' set Yes

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    _{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43794.}

[Bodge-IT]

Thanks for the work on this @Hackwar, nice to get that group of PRs done. Thanks to testers @muhme & @exlemor for testing.