Xparse-J Update 1.1 (2/2) - exploring XML

Xparse-J Update 1.1

Code Change

The code change of Node.find() is relatively minor:

  public Node find(String path, int[] occur) {
    Node n = this;
    JSArray a = new JSArray();
    a.split(path, "/");
    int i = 0;
    while (i 
The findChildElement() method is now called with every
corresponding occurrence parameter in order to return
the n-th Node of the respective simple path expression, i.e.
child element. Be prepared to catch an IndexOutOfBounds
exception if the array does not have as many elements as the path
expression.
Adapting the RSSViewerApplet was quite straightforward as well:
  public void load(String srcURL) throws Exception {
    int dim[] = {1, 1};
    root = new Xparse().parse(readChannel(srcURL));
	...
    while (true) {
      n = top.find("item/title", dim);
      if (n == null) break;
      items.insertElementAt(n.getCharacters(), 2*dim[0]-2);
      n = top.find("item/link", dim);
      if (n == null) break;
      items.insertElementAt(new URL(n.getCharacters()), 2*dim[0]-1);
      ++dim[0];
    }
  }

The loop over RSS items happens in the first dimension of the
occurrence array, as every item only has one title and
one link. Everything else remains unchanged.
Conclusion
With this update to Node.find() Xparse-J is now a truly
generic tool for parsing and manipulating XML documents. If you can
live without all the hard 'n heavy W3C functionality present in the
heavyweights of Xerces and 
xml4j, give
Xparse-J a try!





Produced by Michael Claßen


URL: http://www.webreference.com/xml/column36/2.html

Created: Aug 01, 2001

Revised: Aug 01, 2001