Oracle java XML API - extract

Question

I am using XML oracle Java API, I need to extract tge DOC value, its not working for me
XMLTYPE xml ="
<PurchaseOrder>
<Reference>ADAMS-20011127121040988PST</Reference>
<DOC>SCOTT</DOC>
<Date>2002-03-31</Date>
</PurchaseOrder>";
System.out.println("Testing extract() ...");
try {
System.out.println(" length of text in DOC tag " + (xml.extract("/PurchaseOrder/Reference/DOC/text()",null).getStringVal()));
catch (SQLException e) {
System.out.println("Thin driver Expected exception: " + e);
Throwing java.sql.SQLException
any help please? is there anyother way to extract the value?

Answer 1

I guess this might help you..
Use XPATH if you are reading for a single value in xml .
It will be more cleaner...
String doc= "//PurchaseOrder/Reference/DOC/text()";
Call this in your class using some value
Suppose
setting_to_some_variable.setWhateverDoc(getNodeValueFromDocUsingXPath(doc));
          address
private String getNodeValueFromDocUsingXPath(String xpathString) {
          try {
               XPath xpath = xPathFactory.newXPath();
               XPathExpression expr = xpath.compile(xpathString);
               Node aNode = (Node) expr.evaluate(doc, XPathConstants.NODE);
               if (aNode != null) {
                    return aNode.getNodeValue();
          } catch (XPathExpressionException xpe) {
               xpe.printStackTrace(System.out);
          return null;
     }