NoCookieFilter.java

package controllers.filters;

import java.util.HashMap;
import java.util.Map;

import play.Play;
import play.mvc.Controller;
import play.mvc.Finally;
import play.mvc.Http;

/**
 * Removes cookies from all responses.
 * 
 * This is because cookies are not required in a stateless webservice and
 * we don't want to send any unnecessary information to the client.
 * 
 * @author Alex Jarvis axj7@aber.ac.uk
 */
public class NoCookieFilter extends Controller {
	
	/** 
	 * An empty cookie map to replace any cookies in the response. 
	 */
	private static final Map<String, Http.Cookie> cookies = new HashMap<String, Http.Cookie>(0);
	
	/**
	 * When the configuration property 'cookies.enabled' equals false,
	 * this Finally filter will replace the cookies in the response with an empty Map.
	 */
    @Finally
    protected static void removeCookies() {
    	boolean cookiesEnabled = Boolean.parseBoolean(Play.configuration.getProperty("cookies.enabled"));
    	if (!cookiesEnabled) {
    		response.cookies = cookies;
    	}
    }

}