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Posted to users@wicket.apache.org by Wicket <wi...@gmail.com> on 2011/01/19 18:39:47 UTC

Dealing with json in wicket

Hi,

I read about how to make a JSON response thru wicket but how do you 
handle the request?

/ Mathias

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Re: Dealing with json in wicket

Posted by "Marc Nuri (GMail)" <ma...@gmail.com>.

Hi
I use a combination of an IRequestTarget implementation and an extended
UrlCodingStrategy.
Regards.
--
Marc Nuri
This is what I use, maybe it helps
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
public abstract class JSONRequestTarget implements IRequestTarget {
    private final RequestParameters requestParameters;

    public JSONRequestTarget(RequestParameters requestParameters) {
        this.requestParameters = requestParameters;
    }

    protected abstract JSONArray getJSONData();

    @Override
    public void respond(RequestCycle requestCycle) {
        //Change enconding to support tildes and special characters
        requestCycle.getResponse().setContentType("text/html;
charset=utf-8");
        requestCycle.getResponse().setCharacterEncoding("utf-8");
        requestCycle.getResponse().write(getJSONData().toString());
    }

    @Override
    public void detach(RequestCycle requestCycle) {
        //Clean up stuff
        requestParameters.setParameters(null);
    }

    public Map<String, ?> getParameters() {
        return requestParameters.getParameters();
    }
}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
public abstract class JSONUrlCodingStrategy extends
AbstractRequestTargetUrlCodingStrategy {

    public JSONUrlCodingStrategy(final String mountPath) {
        super(mountPath);
    }

    protected abstract JSONRequestTarget
generateRequestTarget(RequestParameters requestParameters);

    @Override
    public CharSequence encode(IRequestTarget requestTarget) {
        if (!(requestTarget instanceof JSONRequestTarget)) {
            throw new IllegalArgumentException("This encoder can only be
used with "
                    + "instances of " + JSONRequestTarget.class.getName());
        }
        final AppendingStringBuffer url = new AppendingStringBuffer(40);
        url.append(getMountPath());
        final JSONRequestTarget target = (JSONRequestTarget) requestTarget;
        appendParameters(url, new PageParameters(target.getParameters()));
        return url;
    }

    @Override
    public IRequestTarget decode(RequestParameters requestParameters) {
        return generateRequestTarget(requestParameters);
    }

    @Override
    public boolean matches(IRequestTarget requestTarget) {
        boolean ret = false;
        if (requestTarget instanceof JSONRequestTarget) {
            ret = true;
        }
        return ret;
    }

}

>
>

Re: Dealing with json in wicket

Posted by Marc Nuri San Félix <ma...@marcnuri.com>.

Hi
I use a combination of an IRequestTarget implementation and an extended
UrlCodingStrategy.
Regards.
--
Marc Nuri
This is what I use, maybe it helps
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
public abstract class JSONRequestTarget implements IRequestTarget {
    private final RequestParameters requestParameters;

    public JSONRequestTarget(RequestParameters requestParameters) {
        this.requestParameters = requestParameters;
    }

    protected abstract JSONArray getJSONData();

    @Override
    public void respond(RequestCycle requestCycle) {
        //Change enconding to support tildes and special characters
        requestCycle.getResponse().setContentType("text/html;
charset=utf-8");
        requestCycle.getResponse().setCharacterEncoding("utf-8");
        requestCycle.getResponse().write(getJSONData().toString());
    }

    @Override
    public void detach(RequestCycle requestCycle) {
        //Clean up stuff
        requestParameters.setParameters(null);
    }

    public Map<String, ?> getParameters() {
        return requestParameters.getParameters();
    }
}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
public abstract class JSONUrlCodingStrategy extends
AbstractRequestTargetUrlCodingStrategy {

    public JSONUrlCodingStrategy(final String mountPath) {
        super(mountPath);
    }

    protected abstract JSONRequestTarget
generateRequestTarget(RequestParameters requestParameters);

    @Override
    public CharSequence encode(IRequestTarget requestTarget) {
        if (!(requestTarget instanceof JSONRequestTarget)) {
            throw new IllegalArgumentException("This encoder can only be
used with "
                    + "instances of " + JSONRequestTarget.class.getName());
        }
        final AppendingStringBuffer url = new AppendingStringBuffer(40);
        url.append(getMountPath());
        final JSONRequestTarget target = (JSONRequestTarget) requestTarget;
        appendParameters(url, new PageParameters(target.getParameters()));
        return url;
    }

    @Override
    public IRequestTarget decode(RequestParameters requestParameters) {
        return generateRequestTarget(requestParameters);
    }

    @Override
    public boolean matches(IRequestTarget requestTarget) {
        boolean ret = false;
        if (requestTarget instanceof JSONRequestTarget) {
            ret = true;
        }
        return ret;
    }

}

>
>