public static void main(String[] args) throws Exception { try { CatalogReader foo = new CatalogReader("Catalog.xml"); Map<String, TableData> catalog = foo.getCatalog(); // System.out.println (CatalogReader.printCatalog (res)); InputStreamReader converter = new InputStreamReader(System.in); BufferedReader in = new BufferedReader(converter); System.out.format("\nSQL>"); String soFar = in.readLine() + " "; // loop forever, or until someone asks to quit while (true) { // keep on reading from standard in until we hit a ";" while (soFar.indexOf(';') == -1) soFar += (in.readLine() + " "); // split the string String toParse = soFar.substring(0, soFar.indexOf(';') + 1); soFar = soFar.substring(soFar.indexOf(';') + 1, soFar.length()); toParse = toParse.toLowerCase(); // parse it ANTLRStringStream parserIn = new ANTLRStringStream(toParse); SQLLexer lexer = new SQLLexer(parserIn); CommonTokenStream tokens = new CommonTokenStream(lexer); SQLParser parser = new SQLParser(tokens); // if we got a quit if (parser.parse() == false) break; // print the results System.out.println("RESULT OF PARSING"); System.out.println("Expressions in SELECT:"); ArrayList<Expression> mySelect = parser.getSELECT(); for (Expression e : mySelect) System.out.println("\t" + e); System.out.println("Tables in FROM:"); Map<String, String> myFrom = parser.getFROM(); System.out.println("\t" + myFrom); System.out.println("WHERE clause:"); Expression myWhere = parser.getWHERE(); if (myWhere != null) System.out.println("\t" + myWhere); System.out.println("GROUPING att:"); String myGroup = parser.getGROUPBY(); if (myGroup != null) System.out.println("\t" + myGroup); SemanticChecker sc = new SemanticChecker(mySelect, myFrom, myWhere, myGroup, catalog); if (sc.execute() == true) new Optimizer(mySelect, myFrom, myWhere, myGroup, catalog).execute(); else System.err.println("Semantic checking failed"); System.out.format("\nSQL>"); } } catch (Exception e) { System.err.println("Interpreter.main.73: error!"); } }