ParseTreeDOMSerializer.java 文件源码

public ParseTreeDOMSerializer(List<String> ruleNames, Map<Integer, String> invTokenMap, TokenStream tokenStream) {
    this.tokenStream = tokenStream;
      this.ruleNames = ruleNames;
      this.invTokenMap = invTokenMap;
      nodeStack = new Stack<Element>();

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
Document document = null;
try {
    DocumentBuilder builder = factory.newDocumentBuilder();
    document = builder.newDocument();
    Element root = (Element) document.createElement("ast");
    document.appendChild(root);
    nodeStack.push(root);
    domDoc = document;
} catch (Exception pce) {
    pce.printStackTrace();
}
  }