xml-dev - Re: How to ask a SAX parser to stop firing events ? (whithout using Exce

[David Megginson <david@megginson.com>]

Sebastien Sahuc <ssahuc@imediation.com> writes:

> Suppose the Parser has fed your application with half of the XML 
> document and you don't need to go further. How can you gently say to 
> the parser you've done with it ? I would like not to send an 
> Exception, because at runtime it is too time consuming and not really 
> nice. 

In Java, an exception is the *normal* way to do this.  Here's an
example (for SAX1):

  public class DoneParsingException extends SAXException
  {
  }

and then

  public void startElement (String name, AttributeList atts)
  {
    if (iHaveSeenEnough) {
      throw new DoneParsingException();
    }
  }

and then

  try {
    parse(myDocument);
  } catch (DoneParsingException e) {
    System.out.println("Parsing finished OK");
  } catch (SAXException e) {
    System.out.println("Something went wrong");
  }

I'm not sure what is time consuming about this.


All the best,


David

-- 
David Megginson                 david@megginson.com
           http://www.megginson.com/

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