ArrayIndexOutOfBoundsException for compiled JRuby script

Yoko Harada added a comment - 03/Mar/11 8:59 AM Thanks for reporting the bug and helpful code. I could reproduce the exception. I'll have a look.

Yoko Harada added a comment - 03/Mar/11 4:36 PM Hi, I fixed the bug in rev. c32ed17, so you won't get ArrayIndexOutOfBoundsException anymore. But, Two bugs and your misunderstanding were related to run a given sample code correctly. So, let me explain about these. The first bug fix might bother you, but this is the sharing variable policy. Please bear in mind. When a local variable behavior is transient, all local variables should vanish after evaluation. This is to avoid possibilities that lvars in file1.rb are used in file2.rb accidentally. So, you should add it again before the compile method. The second bug fix is exactly the culprit of ArrayIndexOutOfBoundsException. I'd like to say thank you for finding the bug. At last, you need to set ScriptContext to ScriptEngine before compile method is used. I know this is very hard to understand. JSR223 lacks many features to run Ruby code. If there was compile(script, context) method, you would have used that. Unfortunately, not. JRuby needs to know local variables' presence while parsing. Your code didn't set ScriptContext to JRubyEngine, so you'll get another exception. "rbEngine.eval(rbScript, context);" won't set context to ScriptEgine (JSR2223 spec says so), just use to the evaluation. Below is the code run successfully: System.setProperty("org.jruby.embed.localcontext.scope", "threadsafe"); System.setProperty("org.jruby.embed.localvariable.behavior", "transient"); ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine rbEngine = manager.getEngineByName("jruby"); ScriptContext context = new SimpleScriptContext(); String[] texts = new String[] {"ab", "cd"}; context.setAttribute("texts", texts, ScriptContext.ENGINE_SCOPE); String rbScript = " require 'java'\n" + " puts 'test script'\n" + " puts texts[0]\n"; rbEngine.eval(rbScript, context); context.setAttribute("texts", texts, ScriptContext.ENGINE_SCOPE); // needs to set again rbEngine.setContext(context); // needs set context to engine CompiledScript compiledScript = ((Compilable) rbEngine).compile(rbScript); compiledScript.eval(context);