Hi Franz
I'm not sure I totally understand whats going wrong here. The same
ElementHandler object instance gets used by a SAXReader so I don't
understand whats going wrong.
Do you think you could make a JUnit test case (see
dom4j/src/test/org/dom4j/Test*.java for an example) that demonstrates the
problem you're having then we can try fix it?
FWIW I'd like to introduce a full XPath/XSLT pattern style ElementHandler
mechansim to provide more powerful parsing so this code will be reviewd &
updated soon.
James
----- Original Message -----
From: "Franz Beil" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, March 16, 2002 12:07 PM
Subject: [dom4j-user] loosing embedded SAXReader ElementHandler
> Hi,
>
> this is about a problem with an embedded ElementHandler added to a
SAXReader
> called in a main ElementHandler.
>
> I have a project in which I want to construct a DOM from a main XML file
> that contains <import name="href"/> tags for component files. To do this I
> added an ElementHandler to the SAXReader that reads the main file. This
> MainHandler calls another SAXReader to read component files. The <import
> .../> elements are to be replaced by the component root elements.
> Since I have to do some modification of the component DOMs, I added
another
> ElementHandler (ComponentHandler) to the component SAXReader.
> My problem occurs with the handler of the component reader: although the
> reader processes all imports, its handler seems to be lost after
processing
> of the first <import .../>.
>
> The very ugly workaround for the time being is to get a new SAXReader with
> added componentHandler on each call of MainHandler.onEnd().
>
> Did anyone encounter this or a similar problem. Any help or suggestions
are
> greatly appreciated.
> Best,
> Franz
>
> -------------
>
> This code skeleton illustrates the problem: only the /file/content
elements
> of the first imported file are handled (i.e. printed) although the
resulting
> DOM contains all imports. With the commented lines replacing their
> respective counterparts, all /file/content elements will be printed.
>
> public class MainHandler implements ElementHandler {
>
> SAXReader myReader;
>
> public MainHandler() {
> this.myReader = new SAXReader();
> mainReader.addHandler("/file/content", new ComponentHandler());
> }
>
> public void onStart(ElementPath path) {}
>
> public void onEnd(ElementPath path) {
> String href = path.getCurrent().attribute("href").getValue();
> Element importRef = path.getCurrent();
> Element parentElement = curr.getParent();
> // SAXReader onEndReader = new SAXReader();
> // onEndReader.addHandler("/file/content", new ComponentHandler());
>
> File file = new File(href);
> try {
> Element importElement = myReader.read(file).getRootElement();
> // Element importElement =
> onEndReader.read(file).getRootElement();
> } catch {}
>
> // prune and replace
> importRef.detach();
> parentElement.add(importElement);
> }
> }
>
> public class ComponentHandler implements ElementHandler {
> public void onStart(ElementPath path) {
>
System.out.println(path.getCurrent().attribute("name").getValue());
> }
> public void onEnd(ElementPath path) {}
> }
>
>
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