Exemplo n.º 1
0
    public synchronized boolean isIdentifier(String text, Project project) {
      xPathLexer.start(text);
      assert xPathLexer.getState() == 0;

      boolean b = xPathLexer.getTokenType() == XPathTokenTypes.NCNAME;
      xPathLexer.advance();

      if (xPathLexer.getTokenType() == null) {
        return b;
      } else if (xPathLexer.getTokenType() == XPathTokenTypes.COL) {
        xPathLexer.advance();
        b = xPathLexer.getTokenType() == XPathTokenTypes.NCNAME;
        xPathLexer.advance();
        return b && xPathLexer.getTokenType() == null;
      }

      return false;
    }
Exemplo n.º 2
0
  public XPathElement[] split(String path) {
    ANTLRInputStream in;
    try {
      in = new ANTLRInputStream(new StringReader(path));
    } catch (IOException ioe) {
      throw new IllegalArgumentException("Could not read path: " + path, ioe);
    }
    XPathLexer lexer =
        new XPathLexer(in) {
          @Override
          public void recover(LexerNoViableAltException e) {
            throw e;
          }
        };
    lexer.removeErrorListeners();
    lexer.addErrorListener(new XPathLexerErrorListener());
    CommonTokenStream tokenStream = new CommonTokenStream(lexer);
    try {
      tokenStream.fill();
    } catch (LexerNoViableAltException e) {
      int pos = lexer.getCharPositionInLine();
      String msg = "Invalid tokens or characters at index " + pos + " in path '" + path + "'";
      throw new IllegalArgumentException(msg, e);
    }

    List<Token> tokens = tokenStream.getTokens();
    //		System.out.println("path="+path+"=>"+tokens);
    List<XPathElement> elements = new ArrayList<XPathElement>();
    int n = tokens.size();
    int i = 0;
    loop:
    while (i < n) {
      Token el = tokens.get(i);
      Token next = null;
      switch (el.getType()) {
        case XPathLexer.ROOT:
        case XPathLexer.ANYWHERE:
          boolean anywhere = el.getType() == XPathLexer.ANYWHERE;
          i++;
          next = tokens.get(i);
          boolean invert = next.getType() == XPathLexer.BANG;
          if (invert) {
            i++;
            next = tokens.get(i);
          }
          XPathElement pathElement = getXPathElement(next, anywhere);
          pathElement.invert = invert;
          elements.add(pathElement);
          i++;
          break;

        case XPathLexer.TOKEN_REF:
        case XPathLexer.RULE_REF:
        case XPathLexer.WILDCARD:
          elements.add(getXPathElement(el, false));
          i++;
          break;

        case Token.EOF:
          break loop;

        default:
          throw new IllegalArgumentException("Unknowth path element " + el);
      }
    }
    return elements.toArray(new XPathElement[0]);
  }