Fix MultiSourceReader compatibility with Java 16+ #3670
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bbakerman
reviewed
Jul 23, 2024
| } | ||
| LINE_NUMBER_READER_EOS_IS_TERMINATOR = reader.getLineNumber() > 0; | ||
| } | ||
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bbakerman
approved these changes
Jul 23, 2024
| throw new UncheckedIOException(e); | ||
| } | ||
| LINE_NUMBER_READER_EOS_IS_TERMINATOR = reader.getLineNumber() > 0; | ||
| } |
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Minor pick - I would encapsulate this into a static method
So you can do
private static final boolean LINE_NUMBER_READER_EOS_IS_TERMINATOR = determineStuff();
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This is a fix for #2709
LineNumberReaderwas updated in Java 16 to consider EOS a line terminator, so if a source doesn't end in newline,getLineNumber()will return 1 + the value in older Java versions. We ran into this issue at Airbnb where we useMultiSourceReaderto read graphqls files. If a schema file didn't end in newline, theSourceLocationfor some types would be incorrect. This PR attempts to address this issue.Testing:
I ran the unit tests with Java 11 and Java 20 (this required bumping the language version in build.gradle) with and without this fix. Without this fix,
LineNumberingTest,MultiSourceReaderTest,ParserExceptionTest,TypeDefinitionRegistryTestfail with Java 20 as described in the open issue. With this fix, they succeed.This also fixed the bug we ran into at Airbnb.