Hello,
it is safe to cast Node returned from selectNodes() or
selectSingleNodes() to Element if you are sure that XPath expression
returns element(s). Depending on XPath it can return Element,
Attribute, Text etc. So if you hope your Xpath returns Elements only,
it is safe to cast. If you are not sure, you should check type before
cast.
Sincerely
Filip Jirsák
2009/5/1 Per Olesen <p...@trifork.com>:
> I was wondering. Is it safe to cast Node to Element? I am using the
> selectSingleNode method, which gives me a Node instance, but I need an
> Element instance, to be able to set CDATA data on the node/element.
>
> I have seen a lot of code when googling, that simply casts the return
> value of selectSingleNode to Element, but is it safe?
>
> From an example in the dom4j cookbook, I see that selectNodes()
> returns an (untyped) List, where each list entry then is casted to
> Element, like this:
>
> XPath xpathSelector = DocumentHelper.createXPath("/people/
> pers...@name='James']");
> List results = xpathSelector.selectNodes(doc);
> for ( Iterator iter = result.iterator(); iter.hasNext(); ) {
> Element element = (Element) iter.next();
> System.out.println(element.getName();
> }
>
> Does the same hold for selectSingleNode() ?
>
>
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