[GROOVY-3946] Allow overriding the default Groovy class loader

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.6.7
• Fix Version/s: 1.6.8, 1.7.1, 1.8-beta-1
• Assignee: Guillaume Delcroix
• Reporter: Tiago Fernandez
• Created: 18/Dec/09 04:22
• Updated: 30/Dec/09 16:30
• Resolved: 30/Dec/09 16:30

Description

I am using Groovy with JSR-223 and I need to override the default Groovy class loader so I can provide a custom CompilationUnit with an additional PrimaryClassNodeOperation in the SEMANTIC_ANALYSIS phase.

I don't know too much about Groovy internals, but as GroovyScriptEngineImpl's loader field is private and never gets reassigned, the only way I found for making it work is using reflection:

private void overrideDefaultGroovyClassLoader(final ScriptEngine engine) throws Exception {
  final Field classLoader = engine.getClass().getDeclaredField("loader");
  classLoader.setAccessible(true);
  classLoader.set(engine, new CustomGroovyClassLoader());
}

If there is not a better way for doing this today, maybe GroovyScriptEngineImpl should provide a setter or a post construct-like callback method for allowing overriding such field.