public void doStuff(String input) throws Exception { GroovyRecognizer parser; SourceBuffer sourceBuffer = new SourceBuffer(); UnicodeEscapingReader unicodeReader = new UnicodeEscapingReader(new StringReader(input), sourceBuffer); GroovyLexer lexer = new GroovyLexer(unicodeReader); unicodeReader.setLexer(lexer); parser = GroovyRecognizer.make(lexer); parser.setSourceBuffer(sourceBuffer); String[] tokenNames = parser.getTokenNames(); parser.compilationUnit(); AST ast = parser.getAST(); AntlrASTProcessor snippets = new AntlrASTProcessSnippets(); ast = snippets.process(ast); Visitor visitor = new LineColumnChecker(sourceBuffer, tokenNames); AntlrASTProcessor traverser = new SourceCodeTraversal(visitor); traverser.process(ast); } }