Archive::Zip::Member is missing desiredCompressionMethod

Esamina l’implementazione inclusa di Archive::Zip di PerlOnJava, in cui compressionMethod viene registrato per gli oggetti membro, quindi confrontala con l’API desiredCompressionMethod prevista descritta nell’issue. Aggiungi un test di regressione del progetto per la selezione della compressione dei membri ed esegui IO-StructuredOutput-1.008 t/1.t sia sul backend JVM sia sul backend dell’interprete per verificare che tutti i 37 test abbiano esito positivo.

Summary

IO-StructuredOutput-1.008 fails its complete upstream test suite on PerlOnJava because the bundled Archive::Zip::Member implementation does not provide the CPAN-compatible desiredCompressionMethod method.

CPAN evidence

• Distribution: IO-StructuredOutput-1.008
• Failing test: t/1.t
• Archived CPAN tester run: 20260915-125610-17469
• System Perl: PASS, 37/37 tests
• PerlOnJava JVM backend: FAIL, 16/37 tests; exit status 255
• PerlOnJava interpreter backend: FAIL, 16/37 tests; exit status 255

The system-Perl comparison was run in an isolated local library containing the target distribution and its missing pure-Perl dependencies. The full upstream test suite completed successfully there.

Failure

The test reaches the CSV-output case and then aborts when IO::StructuredOutput::output calls:

$member->desiredCompressionMethod(COMPRESSION_DEFLATED);

PerlOnJava reports:

Can't locate object method "desiredCompressionMethod" via package "Archive::Zip::Member"

The failure occurs in both execution backends and is reproducible with the dependency PERL5LIB overlay selected by the CPAN tester.

Expected behavior

Archive::Zip::Member should expose the compression-selection API expected by CPAN Archive::Zip, including desiredCompressionMethod, so the CSV output path completes and t/1.t passes all 37 tests.

Implementation evidence

The bundled PerlOnJava Archive::Zip implementation registers compressionMethod for member objects but does not register or implement desiredCompressionMethod. The Java-backed ZIP writer already supports stored and deflated compression methods, so this appears to be an API compatibility omission rather than an upstream or environment failure.

Environment

• PerlOnJava commit: 1ac22252c2ed069829f8769b9ceeb14372cd163f
• macOS Darwin arm64
• OpenJDK 24.0.2
• PerlOnJava reports Perl version 5.044001

Acceptance criteria

• Add desiredCompressionMethod compatibility for Archive::Zip::Member.
• Add a project-owned regression test covering member compression selection through the PerlOnJava implementation.
• Verify IO-StructuredOutput-1.008 t/1.t passes on both JVM and interpreter backends.