How to use

compile

method

in

sirius.kernel.xml.StructuredNode

/**
 * Returns a given node at the relative path.
 *
 * @param xpath the xpath used to retrieve the resulting node
 * @return the node returned by the given xpath expression
 * @throws IllegalArgumentException if an invalid xpath was given
 */
@Nullable
public StructuredNode queryNode(String xpath) {
  try {
    Node result = (Node) compile(xpath).evaluate(node, XPathConstants.NODE);
    if (result == null) {
      return null;
    }
    return new StructuredNode(result);
  } catch (XPathExpressionException e) {
    throw new IllegalArgumentException(e);
  }
}

/**
 * Returns the property at the given relative path as string.
 *
 * @param path the xpath used to retrieve property
 * @return a string representation of the value returned by the given xpath expression
 * @throws IllegalArgumentException if an invalid xpath was given
 */
@Nullable
public String queryString(String path) {
  try {
    Object result = compile(path).evaluate(node, XPathConstants.NODE);
    if (result == null) {
      return null;
    }
    if (result instanceof Node) {
      String s = ((Node) result).getTextContent();
      if (s != null) {
        return s.trim();
      }
      return s;
    }
    return result.toString().trim();
  } catch (XPathExpressionException e) {
    throw new IllegalArgumentException(e);
  }
}

/**
 * Returns a list of nodes at the relative path.
 *
 * @param xpath the xpath used to retrieve the resulting nodes
 * @return the list of nodes returned by the given xpath expression
 * @throws IllegalArgumentException if an invalid xpath was given
 */
@Nonnull
public List<StructuredNode> queryNodeList(String xpath) {
  try {
    NodeList result = (NodeList) compile(xpath).evaluate(node, XPathConstants.NODESET);
    List<StructuredNode> resultList = new ArrayList<>(result.getLength());
    for (int i = 0; i < result.getLength(); i++) {
      resultList.add(new StructuredNode(result.item(i)));
    }
    return resultList;
  } catch (XPathExpressionException e) {
    throw new IllegalArgumentException(e);
  }
}