ok Martin thanks for explanation!
On 04/25/2013 05:00 PM, Martin Grigorov wrote:
Hi Wolfgang,
On Thu, Apr 25, 2013 at 5:46 PM, Wolfgang <[email protected]> wrote:
Hi heikki!
I needed the same so I did following:
extending AbstractResource
implemented the needed:
protected ResourceResponse newResourceResponse(Attributes attributes) {
ResourceResponse resourceResponse = new ResourceResponse();
final StringBuilder sb = new StringBuilder();
//do sb.append() here your json etc.
resourceResponse.**setWriteCallback(new WriteCallback() {
@Override
public void writeData(Attributes attributes) throws
IOException {
Response response = attributes.getResponse();
response.write(sb.toString());
}
});
resourceResponse.**setContentType("application/**json");
return resourceResponse;
}
written a subclass of ResourceReference which takes a Class as constructor
parameter.
@Martin: why doesn't wicket hasn't something generic?
I guess because it is too simple.
Or maybe it is not ?! See below.
public class GenericResourceReference extends ResourceReference {
private Class<? extends IResource> iResourceClass;
Problem 1) You keep a reference to a class!
- may lead to class loader leaks
- definitely a problem in OSGi environment
public GenericResourceReference(**Class<? extends IResource>
iResourceClass) {
super(iResourceClass.getName()**);
this.iResourceClass = iResourceClass;
}
@Override
public IResource getResource() {
try {
return iResourceClass.newInstance();
What if there is no default constructor ? Users will ask for a factory...
It is much easier to do:
mountResource("/my.json", new ResourceReference("someName") {
@Override
public IResource getResource() {
return new MyResource(...);
}
});
No usage of reflection. The application developer knows what constructor
arguments to pass, etc.
} catch (InstantiationException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
and mounted it in the WebApplication init() method like this:
mountResource("/my.json", new GenericResourceReference(**
MyResource.class));
Greetings from sunny Austria.
-Wolfgang
On 04/25/2013 04:28 PM, heikki wrote:
thanks,
that example does indeed work fine, but I'd rather have *no* markup file,
just generate the XML or JSON myself and send that back in the response.
So I need a mounted IResource to do that ? Any tip how to go about it for
this use case, e.g. use a ByteArrayResource ?
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