private IRubyObject prepareRaiseException(Ruby runtime, IRubyObject[] args, Block block) { if (args.length == 0) { IRubyObject lastException = errorInfo; if (lastException.isNil()) { return new RaiseException(runtime, runtime.getRuntimeError(), "", false).getException(); } return lastException; } IRubyObject exception; ThreadContext context = getRuntime().getCurrentContext(); if (args.length == 1) { if (args[0] instanceof RubyString) { return runtime.getRuntimeError().newInstance(context, args, block); } if (!args[0].respondsTo("exception")) { return runtime.newTypeError("exception class/object expected").getException(); } exception = args[0].callMethod(context, "exception"); } else { if (!args[0].respondsTo("exception")) { return runtime.newTypeError("exception class/object expected").getException(); } exception = args[0].callMethod(context, "exception", args[1]); } if (!runtime.getException().isInstance(exception)) { return runtime.newTypeError("exception object expected").getException(); } if (args.length == 3) { ((RubyException) exception).set_backtrace(args[2]); } return exception; }