Request for new method int NLS.charsetToCCSID( Charset );

[Stefan4112]

Java has the class Charset that can replace the encoding name string. The problem with Charset is that Java changed names (long time ago...). For example from "Cp850" to "IBM850" (CCSID 850). And the name "IBM850" is unknown by jtopen. Instead of adding all aliases known by Java, I propose to support Charset.

int NLS.charsetToCCSID( Charset );

Code example to show problem:

String encoding = NLS.ccsidToEncoding(850)  // returns "Cp850"
Charset charset = Charset.forName(encoding)
String encoding2 = charset.name() // returns "IBM850" because "Cp850" is the old name

The name change can be found here:
https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html
https://docs.oracle.com/en/java/javase/25/intl/supported-encodings.html

[ThePrez]

Valid idea. I have created some workarounds

https://github.com/ThePrez/CcsidGuesser/blob/main/src%2Fmain%2Fjava%2Fcom%2Fgithub%2Ftheprez%2Fccsidguesser%2FCcsidUtils.java#L181

But I agree this would be a good add to JTOpen

[jeber-ibm]

I think we can use the existing encodingToCcsid with a program that generates the values for the encodingCcsid_ hashtable in ConversionMaps.

We can create a hashtable with all the possible supported CCSIDs using a program that looks at the supported charsets and maps them using the existing encodingCcsid_ hashtable.

My proposed program can be found at ... https://github.com/IBM/JTOpen-test/blob/main/src/test/Conv/GenEncodingCcsidConversionMap.java

When I run it using Java 8 on IBM i, it generates 1012 entries for the table, including the following.
encodingCcsid_.put("cp037", "37"); encodingCcsid_.put("Cp037", "37"); encodingCcsid_.put("ibm037", "37"); encodingCcsid_.put("ibm-037", "37"); encodingCcsid_.put("csIBM037", "37"); encodingCcsid_.put("ebcdic-cp-us", "37"); encodingCcsid_.put("ebcdic-cp-ca", "37"); encodingCcsid_.put("ebcdic-cp-nl", "37"); encodingCcsid_.put("ebcdic-cp-wt", "37"); encodingCcsid_.put("037", "37"); encodingCcsid_.put("cpibm37", "37"); encodingCcsid_.put("cs-ebcdic-cp-wt", "37"); encodingCcsid_.put("ibm-37", "37"); encodingCcsid_.put("cs-ebcdic-cp-us", "37"); encodingCcsid_.put("cs-ebcdic-cp-ca", "37"); encodingCcsid_.put("cs-ebcdic-cp-nl", "37"); encodingCcsid_.put("IBM037", "37");

The last entry is always the preferred name.