Injecting dependencies to Restlet ServerResource using Spring IoC
<bean name="restlet-user-server-resource"
      class="project.server.rest.UserServerResource"
      scope="prototype" />

<bean name="restlet-api-server-application"
      class="org.restlet.Application">
        <property name="inboundRoot">
        <bean class="org.restlet.ext.spring.SpringRouter">
            <constructor-arg ref="restlet-api-server-application" />
            <property name="attachments">
            <map>
                <entry key="/user/{userId}"
                       value-ref="restlet-user-server-resource" />
            </map>
            </property>
        </bean>
    </property>
</bean>

<bean name="user-dao,userDao"
      parent="dao-tx-template">

    <property name="target">
        <bean class="project.server.data.dao.UserDao"
              p:sessionFactory-ref="session-factory" />
    </property>
</bean>

package project.server.rest;

import org.restlet.resource.ResourceException;
import org.restlet.resource.ServerResource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Configurable;

import project.server.data.dao.UserDao;
import project.server.data.entities.User;
import project.server.rest.interfaces.UserResource;

@Configurable
public class UserServerResource
extends ServerResource
implements UserResource
{
    private int userId;

    @Autowired
    private UserDao userDao;

    @Override
    public void doInit() throws ResourceException
    {
        String userIdString = (String)this.getRequestAttributes().get("userId");
        this.userId = Integer.parseInt(userIdString);
    }

    @Override
    public User represent()
    {
        System.out.println(this.userDao);

        User user = new User();
        user.setId(this.userId);
        user.setUserName("Something");
        user.setEmailAddress("[email protected]");
        return (user);
    }

    public void setUserDao(UserDao dao)
    {
        this.userDao = dao;
    }

    public UserDao getUserDao()
    {
        return (this.userDao);
    }
}

<bean name="restlet-user-server-resource"
      class="project.server.rest.UserServerResource"
      scope="prototype"
      p:userDao-ref="user-dao" />

<bean name="restlet-api-server-application"
      class="org.restlet.Application">
        <property name="inboundRoot">
        <bean class="org.restlet.ext.spring.SpringRouter">
            <constructor-arg ref="restlet-api-server-application" />
            <property name="attachments">
            <map>
                <entry key="/user/{userId}">
                    <bean class="org.restlet.ext.spring.SpringFinder">
                        <lookup-method name="create" bean="restlet-user-server-resource" />
                    </bean>
                </entry>
            </map>
            </property>
        </bean>
    </property>
</bean>