Configuring Restlet with a servlet container + using the JAX-RS API + JSON encoding

GfeApp.java

import org.restlet.Context;
import org.restlet.ext.jaxrs.JaxRsApplication;
import javax.ws.rs.core.Application;
import java.util.HashSet;
import java.util.Set;
import org.codehaus.jackson.jaxrs.JacksonJsonProvider;


class GfeResources extends Application {
    @Override
    public Set<Object> getSingletons() {
        Set<Object> res = new HashSet<Object>();
        res.add(new JacksonJsonProvider());
        return res;
    }

    public Set<Class<?>> getClasses() {
        Set<Class<?>> res = new HashSet<Class<?>>();
        res.add(FilesystemResource.class);
        return res;
    }
}


public class GfeApp extends JaxRsApplication {
    public GfeApp(Context context) {
        super(context);
        add(new GfeResources());
    } 
}

pom.xml

<repositories>
       <repository>
            <id>maven-restlet</id>
            <name>Public online Restlet repository</name>
            <url>http://maven.restlet.org</url>
        </repository>
</repositories>

<dependencies>
        <dependency>
                    <groupId>org.restlet.jse</groupId>
                    <artifactId>org.restlet</artifactId>
                    <version>2.0.3</version>
                </dependency>
                <dependency>
                    <groupId>org.restlet.jse</groupId>
                    <artifactId>org.restlet.ext.jaxrs</artifactId>
                    <version>2.0.3</version>
                </dependency>
                <dependency>
                    <groupId>org.restlet.jee</groupId>
                    <artifactId>org.restlet.ext.servlet</artifactId>
                    <version>2.0.3</version>
                </dependency>
                <dependency>
                    <groupId>org.restlet.jse</groupId>
                    <artifactId>org.restlet.ext.jackson</artifactId>
                    <version>2.0.3</version>
                </dependency>
            </dependencies>

web.xml

<servlet>
        <servlet-name>RestRestlet</servlet-name>
        <servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class>
        <init-param>
            <param-name>org.restlet.application</param-name>
            <param-value>gfe.server.GfeApp</param-value>
        </init-param>
    </servlet>