[jira] [Created] (JENA-2118) Change IO.asUTF8 to map bad characters to U+FFFD not throw an exception.

[Andy Seaborne (Jira)]

Andy Seaborne created JENA-2118:
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             Summary: Change IO.asUTF8 to map bad characters to U+FFFD not 
throw an exception.
                 Key: JENA-2118
                 URL: https://issues.apache.org/jira/browse/JENA-2118
             Project: Apache Jena
          Issue Type: Bug
    Affects Versions: Jena 4.1.0
            Reporter: Andy Seaborne
            Assignee: Andy Seaborne
             Fix For: Jena 4.2.0


`IO.asUTF8` uses an unmodified `CharsetDecoder` created from 
`StandardCharsets.UTF_8` passed to JDK `InputStreamReader`. It has "unmappable" 
set to REPORT.

But if `InputStreamReader` is passed the charset, it creates then modifies to 
get a `CharsetDecoder` with unmappable set to "REPLACE" (i.e. use U+FFFD, the 
unicode "unmappable" character.)

Change the behaviour to be "REPLACE".






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