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Posted to j-dev@xerces.apache.org by Stadelmann Adi <Ad...@bison-group.com> on 2001/12/18 15:49:50 UTC
missing interface for dom parsing events
hi,
while parsing xml into a dom tree, i need a event
after each endElement. then i can call my functions with
the already parsed dom-tree and decide while parsing for removing from the
document. this is a solution for parsing big xml sources,
and still can use the dom-tree parser instead of
a ugly sax-parser.
xni XMLDocumentHandler with "endElement(Element element);"
could be the solution, what you mean?
Adrian Stadelmann
Software Development
ps: below was my old solution....
---------------------------------------------------
BISON Schweiz AG
Eichweid 5
CH-6203 Sempach-Station
Phone direct +41 41 469 65 03
E-Mail mailto:adrian.stadelmann@bison-group.com
Homepage www.bison-group.com
> -----Ursprüngliche Nachricht-----
> Von: Stadelmann Adi
> Gesendet: Donnerstag, 6. Dezember 2001 09:58
> An: xerces-j-user@xml.apache.org
> Betreff: event of endElement while dom parsing
>
>
> hi
> i try to get events (endElement) while dom parsing for saving
> memory and
> performance.
> org.w3c.dom.events sends only events about an insert of a element, not
> the end of parsing
> could xni be my solution?
> a simple (but dirty) solution was with xerces1:
>
> public interface DOMHandler {
> /**
> * Handles the current parsed Element
> * For save the memory, you should returning true after handled a
> element.
> * This will remove the element in the document-tree
> *
> * @param element the current element
> * @return true if element handled. It will be removed automaticly
> form the DOMStreamParser
> * @exception IEException
> * if an error happen while handle
> */
> public boolean handleElementNode(Element elementNode) throws
> IEException;
> }
>
> and following subclass of DOMParser
>
> public class DOMStreamParser extends DOMParser {
> private DOMHandler _DOMHandler=null;
>
> public DOMStreamParser() {
> try{
> setDeferNodeExpansion(false);
> } catch (Exception e) {
> System.out.println("Error while setting freature off:"+e);
> }
> }
>
> /**
> * Sets a new DOMHandler
> */
> public void setDOMHandler(DOMHandler handler) {
> _DOMHandler=handler;
> }
>
> /**
> * Gets the DOMHandler
> */
> public DOMHandler getDOMHandler() {
> return _DOMHandler;
> }
>
> /**
> * Triggering of endElement and send Event to DOMHandler
> */
> public void endElement(int elementTypeIndex) throws Exception {
> DOMHandler handler=getDOMHandler();
> //First get current Node, because the super.endElement will change
> it
> Element elementNode=getCurrentElementNode();
>
> //call the official endElement
> super.endElement(elementTypeIndex);
>
> //Send notification to DOMHandler
> if (handler!=null && elementNode!=null) {
> boolean
> removeNode=getDOMHandler().handleElementNode(elementNode);
> if (removeNode) ...
> }
> }
> }
>
> cu.
> Adrian Stadelmann
> Software Development
> ---------------------------------------------------
> BISON Schweiz AG
> Eichweid 5
> CH-6203 Sempach-Station
>
>
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Adrian Stadelmann
Software Development
---------------------------------------------------
BISON Schweiz AG
Eichweid 5
CH-6203 Sempach-Station
Phone direct +41 41 469 65 03
E-Mail mailto:adrian.stadelmann@bison-group.com
Homepage www.bison-group.com
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Re: missing interface for dom parsing events
Posted by Andy Clark <an...@apache.org>.
Stadelmann Adi wrote:
> xni XMLDocumentHandler with "endElement(Element element);"
> could be the solution, what you mean?
We're not going to put anything in the XNI interfaces that
adds a direct dependency to other APIs. Therefore, we would
not add SAX or DOM dependencies to XNI.
--
Andy Clark * andyc@apache.org
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