@JRubyMethod(visibility = PRIVATE) public IRubyObject initialize( ThreadContext context, IRubyObject src, IRubyObject dest, IRubyObject _opt) { Ruby runtime = context.runtime; EncodingService encodingService = runtime.getEncodingService(); // both may be null Encoding srcEncoding = encodingService.getEncodingFromObjectNoError(src); Encoding destEncoding = encodingService.getEncodingFromObjectNoError(dest); int flags = 0; IRubyObject replace = context.nil; if (srcEncoding == destEncoding && srcEncoding != null) { throw runtime.newConverterNotFoundError( "code converter not found (" + srcEncoding + " to " + destEncoding + ")"); } // Ensure we'll be able to get charsets fo these encodings try { if (srcEncoding != destEncoding) { if (srcEncoding != null) encodingService.charsetForEncoding(srcEncoding); if (destEncoding != null) encodingService.charsetForEncoding(destEncoding); } } catch (RaiseException e) { if (e.getException().getMetaClass().getBaseName().equals("CompatibilityError")) { throw runtime.newConverterNotFoundError( "code converter not found (" + srcEncoding + " to " + destEncoding + ")"); } else { throw e; } } if (!_opt.isNil()) { if (_opt instanceof RubyHash) { RubyHash opt = (RubyHash) _opt; flags |= EncodingUtils.econvPrepareOpts(context, opt, new IRubyObject[] {opt}); IRubyObject value = opt.fastARef(runtime.newSymbol("replace")); if (value != null) { replace = value; } } else { flags = (int) _opt.convertToInteger().getLongValue(); replace = context.nil; } } transcoder = new CharsetTranscoder(context, destEncoding, srcEncoding, flags, replace); return context.runtime.getNil(); }