I usually had a finite number of xml's 4 or 5 per project top. So I wrote
custom parsers/unmarshallers and use e4x. Works like clockwork :)
C
________________________________
From: W.R. de Boer <w...@innerfuse.biz>
To: flexcoders@yahoogroups.com
Sent: Tue, February 9, 2010 4:02:54 PM
Subject: [flexcoders] Best practices regarding XML to VO conversion
Hello,
I am having a question what the best approach is to convert existing XML data
to a object graph of value objects. I have spend quite some time to fix a
memory leak in my existing parsing practice and I am curious how others solve
this problem.
My common approach is to create a class such as EventReader and EventItemReader
class which is responsible for the parsing of the specific XML element and
return the appropriate value object. But somehow this code is leaking like a
mad dog (200kb per time) while the XML file is only 16kb. Now I have currently
rewritten it so that just using simple strong typed objects.
But I would love to find out what I am doing wrong in my current approach and
how to solve it. Because it makes it easier to reuse the parsing code/logic.
For example, normally, I use the approach of creating a public class with a few
public variables like this:
public class EventItemVO {
public var eventDate: Date;
public var eventName: String;
public var location: String;
}
and then I am having code like this to parse it:
try {
var xml: XML = new XML( loaderContent );
var parser: EventItemXMLReader = new EventItemXMLReader( xml );
parser.parse( );
} catch (e: Error) {
trace("Error occured while parsing");
} finally {
parser = null;
xml = null;
}
in the EventItemXMLReader- class I then return an instance of the EventItemVO-
class
Somehow this leaks and while I do the same stuff in the onComplete-handler of
the Loader and do:
array.push( {eventDate:date, eventName:name, location:location} );
The memory leak disappears. I would expect their is some reference kept alive
but I am having a hard-time finding the reference which keeps it from garbage
collecting it all.
How do you parse XML and convert it in value objects?
Yours,
Weyert de Boer
