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https://issues.apache.org/jira/browse/XERCESJ-1033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliotte Rusty Harold resolved XERCESJ-1033.
--------------------------------------------
Resolution: Not A Bug
CDATASections are not necessarily separate nodes. It's not wrong to drop an
empty one. Per spec "When a document is first made available via the DOM, there
is only one Text node for each block of text." That means CDATA sections are
necessarily combined with surrounding text.
> Empty CDATA section is not retrievable (child is null)
> ------------------------------------------------------
>
> Key: XERCESJ-1033
> URL: https://issues.apache.org/jira/browse/XERCESJ-1033
> Project: Xerces2-J
> Issue Type: Bug
> Components: DOM (Level 3 Core)
> Affects Versions: 2.6.2
> Environment: JDK 1.4.2
> Reporter: Detlev Beutner
> Priority: Major
> 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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