JuliaInterop / JuliaInterop/JavaCall.jl

jar-file inside jar-file

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#77 2 comments 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
Julia
Stars
125
Forks
53
PR merge metrics
No merged PRs in 30d

Description

I have a jar-file which packages its libraries in a lib-directory inside itself. The MANIFEST.MF inside the jar allows the libraries to be found.

When I call a class from the jar the library inside it is not found and I get java.lang.NoClassDefFoundError. I have to extract the lib-directory and add it manually to the class path.

How can I add jar-file inside a jar-file to the class path in JavaCall.jl?

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by examining JavaCall.jl's classpath handling and how it processes a JAR's MANIFEST.MF and nested lib-directory. Reproduce the reported NoClassDefFoundError with a JAR containing libraries inside itself. Done means JavaCall.jl can load those nested libraries without manually extracting them or adding them separately to the class path.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, julia
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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