Changed the type of the message validator and reformated the classes in an appropriate way.

voter-registry/build.gradle

@@ -30,7 +30,7 @@ ext {
         nexusPassword = project.hasProperty('nexusPassword') ? project.property('nexusPassword') : ""
 }
 
-description = "Meerkat Voter Registry application"
+description = "Meerkat Voter RegistryUtils application"
 
 // Your project version
 version = "0.0"

voter-registry/src/main/java/meerkat/MessageValidator.java

@@ -1,10 +1,12 @@
 package meerkat;
 
+import java.util.List;
+
 /**
  * Provides the validation option for objects
  * @param <T>
  */
-public interface MessageValidator<T>
+public interface MessageValidator <T extends List<?>>
 {
     /**
      * Throws ValidationError when no part of the object is valid else return the valid part

voter-registry/src/main/java/meerkat/Registry.java

@@ -1,10 +1,10 @@
 package meerkat;
 
 import com.google.protobuf.Timestamp;
-import meerkat.Registry.BooleanCallBack;
+import meerkat.RegistryUtils.MessagesCallBack;
-import meerkat.Registry.CollectionMessagesUtils;
+import meerkat.RegistryUtils.CollectionMessagesUtils;
-import meerkat.Registry.RegistryTags;
+import meerkat.RegistryUtils.RegistryTags;
-import meerkat.Registry.RelevantDataCallBack;
+import meerkat.RegistryUtils.LatestMessagesCallBack;
 import meerkat.bulletinboard.AsyncBulletinBoardClient;
 import meerkat.crypto.DigitalSignature;
 import meerkat.protobuf.BulletinBoardAPI.BulletinBoardMessage;
@@ -70,7 +70,7 @@ public class Registry implements VoterRegistry{
                         .addTag(RegistryTags.VOTER_DATA_TAG + voterInfo.getInfo())
                         .setTimestamp(Timestamp.newBuilder().setNanos((int) System.nanoTime()).build());
 
-        bulletinBoardClient.postMessage(CreateBulletinBoardMessage(basicMessage.build()), new BooleanCallBack(callback));
+        bulletinBoardClient.postMessage(CreateBulletinBoardMessage(basicMessage.build()), new MessagesCallBack(callback));
     }
 
     public void AddToGroups(VoterRegistryMessage voterGroup, RegistryCallBack callback) {
@@ -85,7 +85,7 @@ public class Registry implements VoterRegistry{
             basicMessage.addTag(RegistryTags.GROUP_ID_TAG + voterGroup.getGroupID(i).getId());
         }
 
-        bulletinBoardClient.postMessage(CreateBulletinBoardMessage(basicMessage.build()), new BooleanCallBack(callback));
+        bulletinBoardClient.postMessage(CreateBulletinBoardMessage(basicMessage.build()), new MessagesCallBack(callback));
     }
 
     public void SetVoted(VoterID voterId, RegistryCallBack callback) {
@@ -95,7 +95,7 @@ public class Registry implements VoterRegistry{
                         .addTag(RegistryTags.VOTE_ACTION_TAG)
                         .setTimestamp(Timestamp.newBuilder().setNanos((int) System.nanoTime()).build());
 
-        bulletinBoardClient.postMessage(CreateBulletinBoardMessage(basicMessage.build()), new BooleanCallBack(callback));
+        bulletinBoardClient.postMessage(CreateBulletinBoardMessage(basicMessage.build()), new MessagesCallBack(callback));
     }
 
     public void GetGroups(GroupID groupID, RegistryCallBack callback) {
@@ -103,7 +103,7 @@ public class Registry implements VoterRegistry{
            add(RegistryTags.GROUP_ID_TAG + groupID.getId());
         }};
         bulletinBoardClient.readMessages(CollectionMessagesUtils.GenerateFiltersFromTags(GroupsActionsTags),
-                new RelevantDataCallBack(callback, signer, signature, certificateStream));
+                new LatestMessagesCallBack(callback, signer, signature, certificateStream));
     }
 
     public void GetPersonIDDetails(VoterID voterID, RegistryCallBack callback) {
@@ -112,6 +112,6 @@ public class Registry implements VoterRegistry{
             add(RegistryTags.VOTER_ENTRY_TAG);
         }};
         bulletinBoardClient.readMessages(CollectionMessagesUtils.GenerateFiltersFromTags(GroupsActionsTags),
-                new RelevantDataCallBack(callback, signer, signature, certificateStream));
+                new LatestMessagesCallBack(callback, signer, signature, certificateStream));
     }
 }

voter-registry/src/main/java/meerkat/RegistryUtils/CollectionMessagesUtils.java

@@ -1,8 +1,7 @@
-package meerkat.Registry;
+package meerkat.RegistryUtils;
 
 import com.google.protobuf.InvalidProtocolBufferException;
 import meerkat.protobuf.BulletinBoardAPI.*;
-import meerkat.protobuf.VoterRegistry;
 
 import java.text.ParseException;
 import java.util.*;
@@ -46,16 +45,9 @@ public abstract class CollectionMessagesUtils {
      */
     private static boolean FirstBeforeSecond(BulletinBoardMessage message1, BulletinBoardMessage message2)
             throws InvalidProtocolBufferException {
-        try {
+            int firstCreationTime =  message1.getMsg().getTimestamp().getNanos();
-            long firstCreationTime =  VoterRegistry.VoterRegistryMessage.newBuilder()
+            long secondCreationTime = message2.getMsg().getTimestamp().getNanos();
-                    .mergeFrom(message1.getMsg().getData()).build().getCreationMiliseconds();
-            long secondCreationTime = VoterRegistry.VoterRegistryMessage.newBuilder()
-                    .mergeFrom(message2.getMsg().getData()).build().getCreationMiliseconds();
             return firstCreationTime < secondCreationTime;
-        } catch (InvalidProtocolBufferException e) {
-            e.printStackTrace();
-            throw e;
-        }
     }
 
     /**

voter-registry/src/main/java/meerkat/RegistryUtils/LatestMessagesCallBack.java

@@ -1,4 +1,4 @@
-package meerkat.Registry;
+package meerkat.RegistryUtils;
 
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.protobuf.InvalidProtocolBufferException;
@@ -18,7 +18,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
-import static meerkat.Registry.CollectionMessagesUtils.*;
+import static meerkat.RegistryUtils.CollectionMessagesUtils.*;
 
 /**
  * TODO : add logging
@@ -26,21 +26,21 @@ import static meerkat.Registry.CollectionMessagesUtils.*;
 
 /**
  * Created by Vladimir Eliezer Tokarev  on 2/19/2016.
- * Object that handles the GetGroups or the GetPersonIDDetails of the simpleRegistry
+ * Gets latest data from given List<BulletinBoardMessage>
  */
-public class RelevantDataCallBack implements FutureCallback<List<BulletinBoardMessage>>, MessageValidator<List<BulletinBoardMessage>> {
+public class LatestMessagesCallBack implements FutureCallback<List<BulletinBoardMessage>>, MessageValidator<List<BulletinBoardMessage>> {
     public RegistryCallBack callback;
     protected DigitalSignature validator;
     protected Crypto.Signature signature;
     protected InputStream certificateStream;
 
     /**
-     * Init BooleanCallBack
+     * Init MessagesCallBack
      * @param callback  voter registry callback object
      * @param validator DigitalSignature object
      * @param signature Crypto.Signature object
      */
-    public RelevantDataCallBack(RegistryCallBack callback,
+    public LatestMessagesCallBack(RegistryCallBack callback,
                                   DigitalSignature validator,
                                   Crypto.Signature signature,
                                   InputStream certificateStream) {

voter-registry/src/main/java/meerkat/RegistryUtils/MessagesCallBack.java

@@ -1,7 +1,6 @@
-package meerkat.Registry;
+package meerkat.RegistryUtils;
 
 import com.google.common.util.concurrent.FutureCallback;
-import meerkat.MessageValidator;
 import meerkat.VoterRegistry;
 
 /**
@@ -12,14 +11,15 @@ import meerkat.VoterRegistry;
  * Created by Vladimir Eliezer Tokarev  on 2/19/2016.
  * Handles the the after post state of VoterRegistry methods (that uses bulletinBoardClient to communicate with the server)
  */
-public class BooleanCallBack implements FutureCallback<Boolean>, MessageValidator<Boolean> {
+public class MessagesCallBack implements FutureCallback<Boolean>
+{
     public VoterRegistry.RegistryCallBack callback;
 
     /**
-     * Init BooleanCallBack
+     * Init MessagesCallBack
      * @param callback  voter registry callback object
      */
-    public BooleanCallBack(VoterRegistry.RegistryCallBack callback) {
+    public MessagesCallBack(VoterRegistry.RegistryCallBack callback) {
         this.callback = callback;
     }
 
@@ -42,15 +42,4 @@ public class BooleanCallBack implements FutureCallback<Boolean>, MessageValidato
     public void onFailure(Throwable t) {
         callback.HandleFailure(t);
     }
-
-    /**
-     * always return true because there no n
-     * @param object object which will be checked
-     * @return alwyas true
-     * @throws ValidationError
-     */
-    @Override
-    public Boolean validate(Boolean object) throws ValidationError {
-        return true;
-    }
 }

voter-registry/src/main/java/meerkat/RegistryUtils/RegistryTags.java

@@ -1,4 +1,4 @@
-package meerkat.Registry;
+package meerkat.RegistryUtils;
 
 
 /**

voter-registry/src/test/java/SimpleRegistryTest.java

@@ -2,8 +2,8 @@ import com.google.common.util.concurrent.FutureCallback;
 import com.google.protobuf.InvalidProtocolBufferException;
 import junit.framework.TestCase;
 import meerkat.Registry;
-import meerkat.Registry.CollectionMessagesUtils;
+import meerkat.RegistryUtils.CollectionMessagesUtils;
-import meerkat.Registry.RegistryTags;
+import meerkat.RegistryUtils.RegistryTags;
 import meerkat.bulletinboard.AsyncBulletinBoardClient;
 import meerkat.bulletinboard.ThreadedBulletinBoardClient;
 import meerkat.crypto.concrete.ECDSASignature;
@@ -29,7 +29,7 @@ import java.util.concurrent.Semaphore;
 
 /**
  * Created by Vladimir Eliezer Tokarev on 1/16/2016.
- * Tests the Simple Registry contents
+ * Tests the Simple RegistryUtils contents
  * NOTE: for most of this tests to pass there should run BulletinBoardServer
  * that should be reachable on BULLETIN_BOARD_SERVER_ADDRESS
  */
@@ -114,7 +114,7 @@ public class SimpleRegistryTest extends TestCase {
     }
 
     /**
-     * Initialize Registry object
+     * Initialize RegistryUtils object
      */
     public void setUp() {
         SetSigner();
@@ -130,7 +130,7 @@ public class SimpleRegistryTest extends TestCase {
         try {
             new Registry(signer, bulletinBoardClient, certStream);
         } catch (Exception e) {
-            assert false : "While creating the Registry exception have been thrown " + e;
+            assert false : "While creating the RegistryUtils exception have been thrown " + e;
         }
     }