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https://issues.apache.org/jira/browse/XERCESJ-911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14365609#comment-14365609
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Michael Glavassevich commented on XERCESJ-911:
----------------------------------------------
Here's a pointer to a rather long discussion on this subject on the j-users
mailing list in 2011: http://markmail.org/thread/mivj2rtk2gs6d6so. Very
unlikely that the design is going to change at this point.
> Traversing the DOM throws NullPointerException
> ----------------------------------------------
>
> Key: XERCESJ-911
> URL: https://issues.apache.org/jira/browse/XERCESJ-911
> Project: Xerces2-J
> Issue Type: Bug
> Components: DOM (Level 3 Core)
> Affects Versions: 2.6.2
> Environment: Operating System: Other
> Platform: PC
> Reporter: Malik Hemani
>
> I'm traversing a Document parsed by the DOMParser and running into
> NullPointerExceptions.
> The exception occurs at
> org.apache.xerces.dom.ParentNode.nodeListItem(Unknown Source)
> org.apache.xerces.dom.ParentNode.item(Unknown Source)
> Sometimes is it also seen when 'NodeList.getLength()' is called.
> The traversing is done using a for loop and recursing into the routine,
> EXAMPLE:
> ========
> Node findNode(Node parentNode) {
> NodeList childNodes = parentNode.getChildNodes();
> for(int i = 0; i < childNodes.getLength(); i++) {
> Node child = childNodes.item(i);
> if (child != null && child.getNodeType != Node.ELEMENT_NODE) {
> continue;
> }
> else {
> // do something
> ...
> ...
> }
> }
> // Then recursively call the above routine
> for (int i = 0; i < childNodes.getLength(); i++) {
> Node child = childnodes.item(i);
>
> if (child != null) {
> Node found = findNode(child);
> // more code to follow
> ...
> ...
> }
> }
> }
> If you need the sample XML document, I prefer to email it you.
> Thanks.
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