implelemtn get all solutions endpoint group by task id

service/src/main/java/CTFApplication.java

 import api.ProxyResource;
+import api.SolutionsResource;
 import api.TasksResource;
 import api.TeamsResource;
 import com.bazaarvoice.dropwizard.webjars.WebJarBundle;
@@ -76,6 +77,7 @@ public class CTFApplication extends Application<ApplicationConfiguration> {
         environment.jersey().register(injector.getInstance(TeamsResource.class));
         environment.jersey().register(injector.getInstance(TasksResource.class));
         environment.jersey().register(injector.getInstance(ProxyResource.class));
+        environment.jersey().register(injector.getInstance(SolutionsResource.class));
 
         //REGISTER AUTH
         environment.jersey().register(new AuthDynamicFeature(
@@ -137,6 +139,7 @@ public class CTFApplication extends Application<ApplicationConfiguration> {
                 bind(TasksResource.class).toInstance(new TasksResource(tasksRepository
                 ));
                 bind(ProxyResource.class).toInstance(new ProxyResource());
+                bind(SolutionsResource.class).toInstance(new SolutionsResource(solutionsRepository));
 
             }
         });

service/src/main/java/api/SolutionsResource.java

+package api;
+
+import objects.Solution;
+import repositories.SolutionsRepository;
+
+import javax.inject.Inject;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+/**
+ * Created by gpietrus on 16.02.16.
+ */
+@Path(value = "/solutions")
+@Produces(MediaType.APPLICATION_JSON)
+public class SolutionsResource {
+
+    private SolutionsRepository solutionsRepository;
+
+    @Inject
+    public SolutionsResource(SolutionsRepository solutionsRepository) {
+        this.solutionsRepository = solutionsRepository;
+    }
+
+    @GET
+    @Path("/all")
+    //todo: refactor mapping
+    public Map<String, List<String>> getTeamsSolutions() {
+        //todo: general refactor
+        return solutionsRepository.getAll()
+                .stream()
+                .collect(Collectors.groupingBy(new Function<Solution, String>() {
+                    @Override
+                    public String apply(Solution solution) {
+                        return solution.getTaskId();
+                    }
+                }))
+                .entrySet()
+                .stream()
+                .collect(Collectors.toMap(
+                        Map.Entry::getKey,
+                        entry -> entry.getValue().stream()
+                                .map(Solution::getTeamId)
+                                .collect(Collectors.toList())
+                ));
+    }
+
+}

service/src/main/java/objects/Solution.java

 package objects;
 
 import com.google.common.collect.ImmutableMap;
+import org.bson.Document;
 
 import java.util.Map;
 
@@ -16,9 +17,22 @@ public class Solution {
         this.taskId = taskId;
     }
 
+    public String getTaskId() {
+        return taskId;
+    }
+
+    public String getTeamId() {
+        return teamId;
+    }
+
+    public Solution(Document document) {
+        this.taskId = document.get("taskId").toString(); //todo: refactor mapping
+        this.teamId = document.get("teamId").toString();
+    }
+
     //todo: refactor mapping
-    public Map<String, Object> toMap() {
-        return ImmutableMap.<String, Object>builder()
+    public Map<String, String> toMap() {
+        return ImmutableMap.<String, String>builder()
                 .put("teamId",teamId)
                 .put("taskId", taskId)
                 .build();

service/src/main/java/repositories/SolutionsRepository.java

@@ -2,9 +2,10 @@ package repositories;
 
 import database.MongoDBConnector;
 import objects.Solution;
-import org.bson.Document;
 
 import javax.inject.Inject;
+import java.util.List;
+import java.util.stream.Collectors;
 
 /**
  * Created by gpietrus on 20.02.2016.
@@ -21,15 +22,15 @@ public class SolutionsRepository implements Repository {
 //
 //    }
 
-//    public List<Solution> getAll() {
-//        return mongoDBConnector.getCollection("solutions")
-//                .stream()
-//                .map(Solution::new)
-//                .collect(Collectors.toList());
-//    }
+    public List<Solution> getAll() {
+        return mongoDBConnector.getCollection("solutions")
+                .stream()
+                .map(Solution::new)
+                .collect(Collectors.toList());
+    }
 
-    public void add(Solution solution) {
-        mongoDBConnector.addDocument("solutions", new Document(solution.toMap()));
+    public void add(Solution solution) { //todo
+//        mongoDBConnector.addDocument("solutions", new Document(solution.toMap()));
     }
 
     public void clean() {