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# JVM Framework Wrappers
Wrappers so you can use all the Java Runtime Environments with their slightly incompatible APIs with more ease.
Used to use an over-engineered "plugin" mechanism although there was only one
"plugin", called "sunmajor", that handles all possible JREs.
IMPORTANT: The `<updated>` element in `vmfwk/distributions/OpenOfficeorg/javavendors_*.xml` files
should only be updated for incompatible changes, not for compatible ones. As stated in the commit
message of <https://gerrit.libreoffice.org/#/c/69730/> in LibreOffice gerrit:
javavendors\_\*.xml <updated\> should not have been updated...
Changing `<updated>` causes `jfw_startVM` and `jfw_getSelectedJRE` (both
`jvmfwk/source/framework.cxx`) to fail with `JFW_E_INVALID_SETTINGS`, which in turn causes functionality
that requires a JVM to issue a GUI error dialog stating that the user must select a new JRE in the
Options dialog. While that behavior makes sense if a JRE was selected that would no longer be
supported by the modified `javavendors_*.xml`, it is just annoying if an already selected JRE is still
supported. And a compatible change to `javavendors_*.xml` implies that an already selected JRE will
still be supported."
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