Serializing Java using XML is bound to have limits, even with all the
customizing and plugin features. XML Schema isn't a design tool for Java
classes. Using objects created from the xjc generated classes in an
application where thread safety (or any other facet of dynamic behaviour)
matters obviously raises issues that are not addressed by the JAXB
specification.
One way to go would be to avoid Java class generation from a schema and to
annotate Java classes with JAXB annotations. This way it would be easy to
deal with synchronisation, or use better strategies for list allocations,
etc.
If you want to stick with generating classes, you might consider using a
design pattern akin to Decorator or Proxy to deal with synchronisation or
other dynamic behaviour issues.
And you always have the option of not using some or all of the document
classes in your application's business logic at all. Transforming between
related objects does create an overhead, but it'll also effectively decouple
the XML representation from the business logic.
.W
On Fri, Oct 2, 2009 at 2:47 AM, Roger Parkinson <roger_at_senanque.co.nz>wrote:
> I could use this too.
> I had a recent performance issue with ArrayList, it goes slow as the size
> gets past a certain point.
> Had to change it to a TreeSet (or similar, I forget the details).
> It wasn't anywhere near JAXB so that was easy, but it might have been, in
> which case I would looking for an answer to this question.
>
> Regards
>
>
> rubinod wrote:
>
> Hi,
>
> I need something thread safe so even a Vector or something from
> java.util.concurrent would be more useful.
>
> Thanks
>
>
> Wolfgang Laun-2 wrote:
>
>
> This depends on PlatformType - is it an xs:simpleType?
>
> What would you like to have instead of ArrayList, and why?
>
> -W
>
>
> On Wed, Sep 30, 2009 at 6:28 PM, rubinod <webaccounts_at_rubino.co.uk> <webaccounts_at_rubino.co.uk> wrote:
>
>
>
> Hi,
>
> Say I have the following:
>
> <xs:element name="Platforms">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="platform" minOccurs="0"
> maxOccurs="unbounded"
> type="c:PlatformType"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
>
> when I run the schema through JAXB to generate the class files I get:
>
> @XmlRootElement(name = "Platforms")
> public class Platforms
> implements Serializable
> {
>
> @XmlElement(name = "platform")
> protected List<Platform> platforms;
>
> public List<Platform> getPlatforms() {
> if (platforms == null) {
> platforms = new ArrayList<Platform>();
> }
> return this.platforms;
> }
>
> }
>
> I would like to be able to override the default List implementation as I
> dont want an ArrayList- is this possible?
>
> Thanks
>
> --
> View this message in context:http://www.nabble.com/Overiding-default-JAXB-mappings-tp25684570p25684570.html
> Sent from the java.net - jaxb users mailing list archive at Nabble.com.
>
>
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