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Posted to j-dev@xerces.apache.org by "Nathan Beyer (JIRA)" <xe...@xml.apache.org> on 2005/06/17 05:27:28 UTC
[jira] Updated: (XERCESJ-1033) Empty CDATA section is not retrievable (child is null)
[ http://issues.apache.org/jira/browse/XERCESJ-1033?page=all ]
Nathan Beyer updated XERCESJ-1033:
----------------------------------
Attachment: bug_1033_patch.txt
The attached patch is a small modification that should resolve this issue, assuming the creation of an empty CDATA node is correct according to the specification.
The path was diffed against the Xerces-J_2_6_2 CVS tag.
> Empty CDATA section is not retrievable (child is null)
> ------------------------------------------------------
>
> Key: XERCESJ-1033
> URL: http://issues.apache.org/jira/browse/XERCESJ-1033
> Project: Xerces2-J
> Type: Bug
> Components: DOM
> Versions: 2.6.2
> Environment: JDK 1.4.2
> Reporter: Detlev Beutner
> Attachments: bug_1033_patch.txt
>
> If a CDATA section is empty, ie <![CDATA[]]>, it is not possible to retrieve this node (eg by getFirstChild()). Instead, null is returned.
> From org.w3c.dom.Node javadoc, getFirstChild() only returns null if there is *no* child. And if there is a CDATA section child, getNodeValue returns "content of the CDATA Section", so in this case by getFirstChild().getNodeValue() an empty string must be returned. In fact, by this call, a NullPointerException gets thrown.
> XML-test-document:
> -----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----
> <test><![CDATA[]]></test>
> -----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----
> Java-test-program:
> -----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----
> import javax.xml.parsers.DocumentBuilder;
> import javax.xml.parsers.DocumentBuilderFactory;
> import org.w3c.dom.Document;
> import org.w3c.dom.Element;
> import org.w3c.dom.Node;
> public class XercesTester {
> public static void main(String[] args) {
> try{
> DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
> DocumentBuilder parser = factory.newDocumentBuilder();
> Document doc = parser.parse("c:/test.xml");
> Element testNode = doc.getDocumentElement();
> System.out.println("Test Root Node: " + testNode.getNodeName());
> System.out.println("Node Value of Root Node: " + testNode.getNodeValue());
> Node cDataNode = testNode.getFirstChild();
> if (cDataNode == null) {
> System.out.println("CDATA Node is null - everything stopped, xml implementation failed!");
> } else {
> System.out.println("CDATA Node: " + cDataNode.getNodeName());
> System.out.println("Node Value of CDATA Node: ---" + cDataNode.getNodeValue() + "---");
> }
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
> }
> -----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----cut-----
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