Add the MessagesUtil file

This file contain helpfull methods for working with messages (such as basicMessage and BulletinBoardMessage)

voter-registry/src/main/java/util/MessagesUtils.java

@@ -0,0 +1,51 @@
+package util;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+import meerkat.ProtobufsMessages;
+import meerkat.protobuf.BulletinBoardAPI;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Dasha on 1/15/2016.
+ */
+public abstract class MessagesUtils {
+
+    /**
+     * Gets all the basic messages from bulletin board messages
+     * @param listOfMessages
+     * @return List<BasicMessage> G
+     * @throws InvalidProtocolBufferException
+     */
+    public static final List<ProtobufsMessages.BasicMessage> GetBasicMessagesFromBulletinBoardMessages(
+            List<BulletinBoardAPI.BulletinBoardMessage> listOfMessages) throws InvalidProtocolBufferException {
+
+        List<ProtobufsMessages.BasicMessage> basicMessages = new ArrayList<ProtobufsMessages.BasicMessage>();
+
+        for (BulletinBoardAPI.BulletinBoardMessage bulletinBoardMessage : listOfMessages){
+            ProtobufsMessages.BasicMessage.Builder basicMessage =
+                    ProtobufsMessages.BasicMessage.newBuilder().mergeFrom(bulletinBoardMessage.getMsg().getData());
+            basicMessages.add(basicMessage.build());
+        }
+
+        return basicMessages;
+    }
+
+    /**
+     * Gets the wanted tag from given basic message
+     * @param message
+     * @param tagName
+     * @return string
+     */
+    public static final String GetWantedTagFromBasicMessage(ProtobufsMessages.BasicMessage message, Tags tagName){
+        List<ProtobufsMessages.Tag> tags = message.getTagList();
+
+        for (ProtobufsMessages.Tag tag : tags) {
+            if ( tag.getContent().contains(tagName.toString())) {
+                return tag.getContent();
+            }
+        }
+        return null;
+    }
+}