Merge pull request #208 from kwek20/dev

Fixed issue with the store

Author: Brord van Wierst

jota/src/main/java/org/iota/jota/account/ExportedAccountState.java

@@ -9,6 +9,10 @@ public class ExportedAccountState {
     private String id;
 
     private AccountState state;
+    
+    public ExportedAccountState() {
+        
+    }
 
     public ExportedAccountState(Date exportedDate, String id, AccountState state) {
         this.exportedDate = exportedDate;
@@ -27,4 +31,9 @@ public String getId() {
     public AccountState getState() {
         return state;
     }
+
+    @Override
+    public String toString() {
+        return "ExportedAccountState [exportedDate=" + exportedDate + ", id=" + id + ", state=" + state + "]";
+    }
 }

jota/src/main/java/org/iota/jota/store/MemoryStore.java

@@ -18,7 +18,8 @@ public MemoryStore() {
     }
 
     public MemoryStore(Map<String, Serializable> store) {
-        this.store = store;
+        // Copy to ensure writeability
+        this.store = new ConcurrentHashMap<String, Serializable>(store);
     }
 
     @Override