JsonHttpView

ErrorInterceptor.java

package br.com.smartcoders.easyclinic.components;

import org.springframework.http.HttpStatus;

import br.com.caelum.vraptor.Intercepts;
import br.com.caelum.vraptor.Result;
import br.com.caelum.vraptor.InterceptionException;
import br.com.caelum.vraptor.core.InterceptorStack;
import br.com.caelum.vraptor.interceptor.Interceptor;
import br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor;
import br.com.caelum.vraptor.resource.ResourceMethod;
import br.com.smartcoders.easyclinic.services.security.AccessDeniedException;

@Intercepts(before=ParametersInstantiatorInterceptor.class)
public class ErrorInterceptor implements Interceptor {
    
    private Result result;

    private ErrorInterceptor(Result result){
        this.result = result;
    }
    
    @Override
    public void intercept(InterceptorStack stack, ResourceMethod method, Object resourceInstance) throws InterceptionException {
        try{
            try {
                stack.next(method, resourceInstance);
            }
            catch(InterceptionException error) {
                Class<? extends Throwable> errorClass = error.getCause().getClass();
                throw errorClass.cast(error.getCause());
            }
        }
        catch(HttpStatusException error) {
            error.printStackTrace();
            result.use(JsonHttpView.class)
                  .withStatus(error.getHttpStatus())
                  .withoutRoot()
                  .from(new ResultWrapper(error))
                  .serialize();
        }
        catch(AccessDeniedException error) {
            error.printStackTrace();
            result.use(JsonHttpView.class)
                  .withStatus(HttpStatus.FORBIDDEN)
                  .withoutRoot()
                  .from(new ResultWrapper(error))
                  .serialize();
        }
        catch(Throwable error) {
            error.printStackTrace();
            result.use(JsonHttpView.class)
                  .withStatus(HttpStatus.INTERNAL_SERVER_ERROR)
                  .withoutRoot()
                  .from(new ResultWrapper(error))
                  .serialize();
        }
    }

    @Override
    public boolean accepts(ResourceMethod method) {
        return true;
    }

}

JsonHttpView.java

package br.com.smartcoders.easyclinic.components;

import static br.com.caelum.vraptor.view.Results.*;

import javax.servlet.http.HttpServletResponse;

import org.springframework.http.HttpStatus;

import br.com.caelum.vraptor.Result;
import br.com.caelum.vraptor.View;
import br.com.caelum.vraptor.ioc.Component;
import br.com.caelum.vraptor.serialization.NoRootSerialization;
import br.com.caelum.vraptor.serialization.Serializer;

@Component
public class JsonHttpView implements View {
    
    private HttpServletResponse response;
    private Result result;
    
    public JsonHttpView(HttpServletResponse response, Result result) {
        this.response = response;
        this.result = result;
    }
    
    public JsonHttpView withStatus(HttpStatus status){
        response.setStatus(status.value());
        return this;
    } 
    
    public NoRootSerialization withoutRoot() {
        return result.use(json()).withoutRoot();
    }
    
    public Serializer from(Object object) {
        return result.use(json()).from(object);
    }
}