retrieve json object fields

[Jordan Blay]

Hi!

Since Jersey doesn't have the @Required annotation I decided to implement
mine.

In my code, I need to retrieve the query parameters, the form parameters and
the json object fields and values.

My filter is:


private class Filter implements ResourceFilter, ContainerRequestFilter {

private final ArrayList<String> requiredParameters;

protected Filter() {
requiredParameters = null;
}

protected Filter(ArrayList<String> requiredParameters) {
this.requiredParameters = requiredParameters;
}

@Override
public ContainerRequestFilter getRequestFilter() {
return this;
}

@Override
public ContainerResponseFilter getResponseFilter() {
return null;
}

// ContainerRequestFilter

@Override
public ContainerRequest filter(ContainerRequest request) {
if (requiredParameters != null && requiredParameters.size() > 0) {
// loop over them and see if the required parameters are not
// empty
MultivaluedMap<String, String> params = request.getQueryParameters();
params.putAll(request.getFormParameters());

StringBuffer missingParams = new StringBuffer();
for (String reqParam : requiredParameters) {
List<String> paramValues = params.get(reqParam);
if (paramValues == null || paramValues != null && paramValues.size() ==
0)
missingParams.append(reqParam + ",");
}
if (missingParams.length() > 0)
throw new WrongInputException("Required parameters are missing: " +
missingParams);
}
return request;
}
}

As you can see in filter method I can retrieve the query and form param as
map: name and value. I would like to retrieve the same for the json object.

For instance, if I have the object:

@XmlRootElement
public class AnyEmail{
String name;
}

I will also get "name","value" in another map.

What is the way to do it? Is there a prepared Jersey method for it or I have
to use reflection and do it myself?

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