add VoteStats. incomplete aggregation

app/controllers/VoteController.java

 package controllers;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import models.Session;
 import models.Vote;
+import models.VoteStats;
 import play.libs.Json;
 import play.mvc.BodyParser;
 import play.mvc.Controller;
@@ -34,7 +38,7 @@ public class VoteController extends Controller {
 		JsonNode json = request().body().asJson();
 		Vote vote = Json.fromJson(json, Vote.class);
 		if (!vote.owner.isEmpty()) {
-			Vote inserted = new Vote(session, vote.owner, vote.type, vote.vote);
+			Vote inserted = new Vote(session, vote.owner, vote.type, vote.value);
 			session.addVote(inserted);
 			session.save();
 			return created(Json.toJson(inserted)); // 201
@@ -61,4 +65,53 @@ public class VoteController extends Controller {
 			return ok(Json.toJson(session.votes)); // 200
 		}
 	}
+
+	/**
+	 * Gets aggregated statistics of {@link Vote}s for a {@link Session} as
+	 * {@link VoteStats}
+	 * 
+	 * @param sid
+	 *            the ID of a Session
+	 * @return list of VoteStats
+	 */
+	public static Result getVoteStats(String sid) {
+		Session session = Session.find.byId(sid);
+		if (session == null) {
+			return notFound("session not found"); // 404
+		} else {
+			VoteStats sAll = new VoteStats(VoteStats.Type.ALL, 0);
+			VoteStats sSpeed = new VoteStats(VoteStats.Type.SPEED, 0);
+			VoteStats sUnderstandability = new VoteStats(
+					VoteStats.Type.UNDERSTANDABILITY, 0);
+			VoteStats sRequests = new VoteStats(VoteStats.Type.REQUEST, 0);
+			List<VoteStats> vsList = new ArrayList<VoteStats>();
+			vsList.add(sAll);
+			vsList.add(sSpeed);
+			vsList.add(sUnderstandability);
+			vsList.add(sRequests);
+
+			// generate statistics
+			for (Vote v : session.votes) {
+				switch (v.type) {
+				case SPEED:
+					// TODO: aggregate
+					sSpeed.value = v.value;
+					sAll.value = v.value;
+					break;
+				case UNDERSTANDABILITY:
+					// TODO: aggregate
+					sUnderstandability.value = v.value;
+					sAll.value = v.value;
+					break;
+				case REQUEST:
+					sRequests.value += v.value.compareTo(0);
+					break;
+				default:
+					break;
+				}
+			}
+
+			return ok(Json.toJson(vsList)); // 200
+		}
+	}
 }

app/models/Vote.java

@@ -34,7 +34,7 @@ public class Vote extends Model {
 	public Date date = new Date();
 
 	@Column(nullable = true)
-	public Integer vote;
+	public Integer value;
 
 	@Constraints.Required
 	public Type type;
@@ -48,19 +48,16 @@ public class Vote extends Model {
 
 		@EnumValue("R")
 		REQUEST,
-
-		@EnumValue("N")
-		NOREQUEST,
 	}
 
 	public static Finder<Long, Vote> find = new Finder<Long, Vote>(Long.class,
 			Vote.class);
 
-	public Vote(Session session, String owner, Type type, Integer vote) {
+	public Vote(Session session, String owner, Type type, Integer value) {
 		this.session = session;
 		this.owner = owner;
 		this.type = type;
-		this.vote = vote;
+		this.value = value;
 	}
 
 }

app/models/VoteStats.java

+package models;
+
+import java.util.Date;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+import play.data.format.Formats;
+import play.data.validation.Constraints;
+import play.db.ebean.Model;
+
+import com.avaje.ebean.annotation.EnumValue;
+
+@Entity
+public class VoteStats extends Model {
+
+	private static final long serialVersionUID = 8660259739658830119L;
+
+	@Id
+	public Long id;
+
+	@Formats.DateTime(pattern = "yyyy-MM-dd HH:mm:ss")
+	public Date date = new Date();
+
+	@Column(nullable = true)
+	public Integer value;
+
+	@Constraints.Required
+	public Type type;
+
+	public enum Type {
+		@EnumValue("A")
+		ALL,
+		
+		@EnumValue("S")
+		SPEED,
+
+		@EnumValue("U")
+		UNDERSTANDABILITY,
+
+		@EnumValue("R")
+		REQUEST,
+	}
+
+	public static Finder<Long, VoteStats> find = new Finder<Long, VoteStats>(Long.class,
+			VoteStats.class);
+
+	public VoteStats(Type type, Integer value) {
+		this.type = type;
+		this.value = value;
+	}
+
+}

conf/routes

@@ -18,4 +18,4 @@ POST    /sessions/:sid/resetanswers/:owner  controllers.QuestionController.reset
 # Vote
 GET     /sessions/:sid/votes         controllers.VoteController.getVotes(sid: String)
 POST    /sessions/:sid/votes         controllers.VoteController.createVote(sid: String)
-# TODO: aggregierte daten abfragen
\ No newline at end of file
+GET     /sessions/:sid/votestats     controllers.VoteController.getVoteStats(sid: String)
\ No newline at end of file