GeckoGenerator.java 文件源码

protected SpecificationContext parse(Lexer lexer, Parser parser, InputStream is, Reader r) throws IOException, IllegalAccessException, PrintException {
  ANTLRInputStream input = new ANTLRInputStream(r);
  lexer.setInputStream(input);
  CommonTokenStream tokens = new CommonTokenStream(lexer);

  tokens.fill();

  if (options.showTokens) {
    for (Object tok : tokens.getTokens()) {
      System.out.println(tok);
    }
  }

  if (options.diagnostics) {
    parser.addErrorListener(new DiagnosticErrorListener());
    parser.getInterpreter().setPredictionMode(PredictionMode.LL_EXACT_AMBIG_DETECTION);
  }

  parser.setBuildParseTree(true);

  // SLL overrides diagnostics
  // %%% Not sure what it really is though.
  if (options.sll) {
    parser.getInterpreter().setPredictionMode(PredictionMode.SLL);
  }

  parser.setTokenStream(tokens);
  parser.setTrace(options.trace);

  SpecificationContext tree = ((GeckoIDLParser)parser).specification();

  if (options.printTree) {
    System.out.println(tree.toStringTree(parser));
  }
  if (options.gui) {
    tree.inspect(parser);
  }
  if (options.psFile != null) {
    tree.save(parser, options.psFile); // Generate postscript
  }

  return tree;
}