https://bugs.freedesktop.org/show_bug.cgi?id=42982
Bug #: 42982
Summary: [EasyHack] improve UNO API error reporting
Classification: Unclassified
Product: LibreOffice
Version: LibO Master
Platform: Other
OS/Version: All
Status: NEW
Severity: minor
Priority: medium
Component: Libreoffice
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
There are many implementations of UNO APIs in LibreOffice,
and a lot of them have only very primitive error reporting.
In many cases the only form of error reporting used is
"throw RuntimeException;", which is completely unhelpful
to API users such as extension developers.
Such exceptions should be improved:
1. most importantly, an error message should be included in
the exception so the API user may get some idea what
is going wrong.
for this, the newly introduced printf-style OSL_FORMAT
macro may be useful.
2. in some cases a more specific exception than RuntimeException
can be thrown.
but beware that only the exceptions that are listed in the
exception specification of the UNO API method may be thrown;
subtypes of RuntimeException are always allowed, but there
are surprising exceptions (IIRC IllegalArgumentException is
one) that are not subtypes of RuntimeException.
the offending exceptions can easily be found with "git grep".
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