Using DOM

Question

Hi everyone,
I was wondering if someone could give me a hand with the following.
I am planning to create a simple search engine to search for products for a computer parts retailer. The list of products is stored in an XML repository , and all queries to this repository are sent as XML documents.
The search engine web page will display a single text input field, into which a user can enter a keyword to search for
I am using DOM to convert the Html search query to an XML document.
Here is my DOM code so far.
<%@page import="java.io.*"%>
<%@page import="javax.xml.parsers.*"%>
<%@page import="org.w3c.dom.*"%>
<%@page import="org.apache.xml.serialize.*"%>
<%!
String 
search,textfield;
%>
<%
// Retrieve the Search query
search = request.getParameter("search");
textfield = request.getParameter("textField");
// Create a new DOM factory, and from that a new DOM builder object
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();// Note that we are creating a new (empty) document
Document document = builder.newDocument();
// The root element of our document wil be <query>
// It gets stored as the child node of the whole document (it is the root)
rootElement = document.createElement("query");
document.appendChild(rootElement);
// Create an <searchterm> element , place underneath <query>
Element searchtermElement = document.createElement("searchterm");
searchtermElement.appendChild(document.createTextNode(searchterm));
rootElement.appendChild(searchtermElem
I am just wondering if my DOM code looks correct so far?

Answer 1

A further cast didn't help either. For a change I have abandonded the JAXP approach and instead have built an example found at
http://otn.oracle.com/pub/listings/vohra_xmlschema_l4.html
that shows how to validate against a schema.
I have changed the method to return the validated document and have then tried to apply some of the D0M validation methods supposed to return a NameList but I still always get null.
I have posted the example Java program at
http://home.arcor.de/martin.honnen/java/xml/Test20040308.java.txt
and run it against the example schema and XML files at http://home.arcor.de/martin.honnen/java/xml/test20040307Xsd.xml http://home.arcor.de/martin.honnen/java/xml/test20040307.xml
While the parsing works and the XML is judged valid according to the schema attempts to use the DOM validation methods to return a NameList fail to return one.
Does anyone have an example using any DOM Level 3 validation interfaces/methods successfully?