подправил кеширование отображаемых данных ( чтобы не распаковывать каждый раз список имен групп и прочее)

src/Common/UI/VisualCache/ConfigurationCache.java

@@ -0,0 +1,57 @@
+package Common.UI.VisualCache;
+import Common.Global;
+import Common.Utils.Utils;
+import TestingSystem.Common.Configuration.Configuration;
+import TestingSystem.Common.Group.Group;
+import TestingSystem.Common.Group.Json.GroupJson;
+import TestingSystem.Common.Group.Json.GroupsJson;
+import TestingSystem.Common.Test.Json.TestJson;
+import TestingSystem.Common.Test.Json.TestsJson;
+import TestingSystem.Common.Test.Test;
+
+import java.util.Vector;
+public class ConfigurationCache extends VisualCache{
+    public GroupsJson groupsJson = null;
+    public Vector<String> groupsDescriptions = null;
+    public TestsJson testsJson = null;
+    //--
+    public ConfigurationCache(Configuration configuration) {
+        if (configuration.packedGroupsJson.isEmpty())
+            groupsJson = new GroupsJson(); //просто пустой
+        else
+            groupsJson = Utils.gson.fromJson(configuration.packedGroupsJson, GroupsJson.class);
+        //--
+        if (testsJson == null) {
+            if (configuration.packedTestsJson.isEmpty())
+                testsJson = new TestsJson(); //просто пустой
+            else
+                testsJson = Utils.gson.fromJson(configuration.packedTestsJson, TestsJson.class);
+        }
+        //-
+        groupsDescriptions = new Vector<>();
+        for (GroupJson groupJson : groupsJson.array)
+            groupsDescriptions.add(groupJson.description);
+    }
+    public int getTestsCount() {
+        return testsJson.array.size();
+    }
+    public Vector<String> getGroupsDescriptions() {
+        return groupsDescriptions;
+    }
+    public Vector<Group> getGroups(){
+        Vector<Group> groups = new Vector<>();
+        for (GroupJson groupJson : groupsJson.array){
+            if (Global.testingServer.db.groups.containsKey(groupJson.id))
+                groups.add(Global.testingServer.db.groups.get(groupJson.id));
+        }
+        return groups;
+    }
+    public Vector<Test> getTests(){
+        Vector<Test> tests = new Vector<>();
+        for (TestJson testJson : testsJson.array){
+            if (Global.testingServer.db.tests.containsKey(testJson.id))
+                tests.add(Global.testingServer.db.tests.get(testJson.id));
+        }
+        return tests;
+    }
+}