Justin Leet created METRON-614:
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Summary: Eliminate use of the default Charset
Key: METRON-614
URL: https://issues.apache.org/jira/browse/METRON-614
Project: Metron
Issue Type: Bug
Reporter: Justin Leet
Priority: Minor
During work on Metron-612, I noticed a lot of our warnings are from implicit
use of the default Charset (e.g. when creating InputStreamReaders). Given that
this value is platform dependent, we should at least consider explicitly using
a particular Charset.
In addition, after fixing this, I would like to see it upgraded to a compile
error, because in my experience almost everyone tends to use methods that use
the implicit default Charset. This can be done by changing the compiler arg in
the pom to instead be
{code}
<compilerArgs>
<arg>-Xlint:unchecked</arg>
<arg>-Xep:DefaultCharset:ERROR</arg>
</compilerArgs>
{code}
My assumption is that we'll want UTF-8, but given a lack of expertise and that
usually there's a lot of opinions on character set issues, we may want to
consider other options.
http://errorprone.info/bugpattern/DefaultCharset
https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html lists
standard Charsets and provides more details.
{code}
Charset Description
US-ASCII Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block
of the Unicode character set
ISO-8859-1 ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1
UTF-8 Eight-bit UCS Transformation Format
UTF-16BE Sixteen-bit UCS Transformation Format, big-endian byte order
UTF-16LE Sixteen-bit UCS Transformation Format, little-endian byte order
UTF-16 Sixteen-bit UCS Transformation Format, byte order identified by an
optional byte-order mark
{code}
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