Re: Parsing XML attributes with DOM

From:
Thomas Fritsch <i.dont.like.spam@invalid.com>
Newsgroups:
comp.lang.java.help
Date:
Mon, 06 Nov 2006 17:50:29 GMT
Message-ID:
<newscache$5klb8j$zf9$1@news.ops.de>
Ian Wilson wrote:
[...]

-------------------- animals.xml ------------------------
<inventory>
  <animal type="mammal">
    <name>Fred</name>
    <species>Hippo</species>
    <weight units="Kg">1552</weight>
  </animal>
  <animal type="reptile">
    <name>Gert</name>
    <species>Croc</species>
  </animal>
</inventory>
-------------------- ParseXML.java -----------------------

[...]

    private static void doNode(Node node, String name) {
        String nodeName = "unknown";
        switch (node.getNodeType()) {
        case Node.ELEMENT_NODE:
            if (name.length() == 0) {
                nodeName = node.getNodeName();
            } else {
                nodeName = name + "." + node.getNodeName();
            }
            doRecursive(node, nodeName);
            break;
        case Node.TEXT_NODE:
            String text = node.getNodeValue();
            if (text.length() == 0 || text.matches("\n *")
                    || text.equals("\\r")) {
                break;
            }

            // I seem to be on the wrong track here!
            String type = "";
            NamedNodeMap attrs = node.getAttributes();
            if (attrs != null) {
                Node attr = attrs.getNamedItem("type");
                if (attr != null) {
                    type = attr.getNodeValue();
                }
            }

            System.out.println(name + "(" + type + ") = '"
                                    + text + "'.");

Some thoughts:
(1) You should place the code above (concerning the extraction of the
"type" attribute) not in your Node.TEXT_NODE case, but in your
Node.ELEMENT_NODE case. Reason is that the "type" attribute belongs to
an element-node (the <animal> element), not to a text-node.
(2) You should do something similar (like you do for extracting the
"type" attribute) for extracting the "weight" attribute from an element
node.

            nodeName = "unknown";
            break;
        default:
            System.out.println("Other node " + node.getNodeType()
                    + " : " + node.getClass());
            break;
        }
    } // doNode()

}

[...]

Clues?


--
Thomas

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