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https://issues.apache.org/jira/browse/PDFBOX-5600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-5600.
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Resolution: Fixed
> applyGsubFeature() doesn't use the longest possible replacement
> ---------------------------------------------------------------
>
> Key: PDFBOX-5600
> URL: https://issues.apache.org/jira/browse/PDFBOX-5600
> Project: PDFBox
> Issue Type: Sub-task
> Components: FontBox
> Affects Versions: 3.0.0 PDFBox
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Major
> Labels: gsub
> Fix For: 3.0.0 PDFBox
>
>
> While working on latin ligatures I noticed that in words like "affluent" only
> "ff" was caught but not "ffl".
> CompoundCharacterTokenizer calls getRegexFromTokens which returns Strings like
> {noformat}
> (_79_99_)|(_80_99_)|(_92_99_)
> {noformat}
> and makes a regexp out of that.
> tokenize finds its match with find(), but not neccessarly the longest.
> Thus getRegexFromTokens should sort by reverse length the set that is used by
> CompoundCharacterTokenizer. I'm solving this with a custom TreeSet in
> getMatchersAsStrings.
> This will of course make everything slower; in the long run, maybe we should
> rewrite the code so that it doesn't use the regexp logic (although it's a
> smart idea!), but only after we have more real world test coverage.
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