Hi,
Xybrek wrote:
> Hi I saw a XStream implementation for Google App Engine however I am
> still getting a "Cannot construct [class] as it does no have a no-args
> constructor:
>
> @Test
> public void testNoNoArgs() {
> Car car = new Car(1, "Blue");
> XStream xstream = new XStreamGae();
> String s = xstream.toXML(car);
> Car c = (Car) xstream.fromXML(s);
> }
>
>
> The complete stack trace is here: http://pastebin.com/TGF6N17W
>
> The XStream related dependency in my application are:
>
> <dependency>
> <groupId>com.thoughtworks.xstream</groupId>
> <artifactId>xstream</artifactId>
> <version>1.4.2</version>
> </dependency>
> <dependency>
> <groupId>xpp3</groupId>
> <artifactId>xpp3_min</artifactId>
> <version>1.1.4c</version>
> </dependency>
Xpp3 is superfluous, since ...
> <!-- XStreamGae Dependencies -->
> <dependency>
> <groupId>net.sf.kxml</groupId>
> <artifactId>kxml2-min</artifactId>
> <version>2.3.0</version>
> </dependency>
... XStreamGae uses kXML2 instead.
> <dependency>
> <groupId>xmlpull</groupId>
> <artifactId>xmlpull</artifactId>
> <version>1.1.3.1</version>
> </dependency>
>
> The XStreamGae class can be found here:
>
> http://www.wappworks.com/2011/11/11/using-xstream-with-google-app-engine/
>
> Is there a work-around to make this work-around work?
No. As you can see, XStreamGae is explicitly initialized in pure Java mode,
because the enhanced mode *cannot* work with GAE due to its security policy.
You will have to add a no-arg constructor.
- Jörg
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