DOMBuilder.java 文件源码

/**
 * Fire off the full parse of the input and return the resulting DOM object.
 * Any errors encountered during the parse will be logged in the Log class.
 * <p>
 * @see Log
 * <p>
 * @return the DOM built by parsing the string or file.
 */
@Override
public DOM build() {
  ParserErrorListener parserListener = new ParserErrorListener(dom);
  ISELexer lexer = new ISELexer(ais);
  lexer.removeErrorListeners();
  lexer.addErrorListener(parserListener);

  CommonTokenStream tokenStream = new CommonTokenStream(lexer);

  ISEParser parser = new ISEParser(tokenStream);
  parser.removeErrorListeners();
  parser.addErrorListener(parserListener);

  ParseTreeWalker ptw = new ParseTreeWalker();
  tokens = parser.getTokenStream();
  ParseTree pt = parser.document();
  ptw.walk(this, pt);
  dom.index();
  return dom;
}