QQQ-16 some cleanup and increased test cover

src/main/java/com/kingsrook/qqq/backend/core/callbacks/NoopCallback.java

@@ -0,0 +1,58 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2022.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.callbacks;
+
+
+import java.io.Serializable;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import com.kingsrook.qqq.backend.core.model.actions.query.QQueryFilter;
+import com.kingsrook.qqq.backend.core.model.metadata.QFieldMetaData;
+
+
+/*******************************************************************************
+ ** Simple implementation of a callback, that does no-op (returns empty objects).
+ ** Useful for scaffolding, perhaps tests.
+ *******************************************************************************/
+public class NoopCallback implements QProcessCallback
+{
+   /*******************************************************************************
+    ** Get the filter query for this callback.
+    *******************************************************************************/
+   @Override
+   public QQueryFilter getQueryFilter()
+   {
+      return (new QQueryFilter());
+   }
+
+
+
+   /*******************************************************************************
+    ** Get the field values for this callback.
+    *******************************************************************************/
+   @Override
+   public Map<String, Serializable> getFieldValues(List<QFieldMetaData> fields)
+   {
+      return (Collections.emptyMap());
+   }
+}

src/main/java/com/kingsrook/qqq/backend/core/model/metadata/QTableMetaData.java

@@ -22,6 +22,7 @@
 package com.kingsrook.qqq.backend.core.model.metadata;
 
 
+import java.io.Serializable;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -30,7 +31,7 @@ import java.util.Map;
  ** Meta-Data to define a table in a QQQ instance.
  **
  *******************************************************************************/
-public class QTableMetaData
+public class QTableMetaData implements Serializable
 {
    private String name;
    private String label;

src/main/java/com/kingsrook/qqq/backend/core/modules/defaults/FullyAnonymousAuthenticationModule.java

@@ -27,18 +27,14 @@ import java.util.UUID;
 import com.kingsrook.qqq.backend.core.model.session.QSession;
 import com.kingsrook.qqq.backend.core.model.session.QUser;
 import com.kingsrook.qqq.backend.core.modules.interfaces.QAuthenticationModuleInterface;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 
 
 /*******************************************************************************
- **
+ ** An authentication module with no actual backing system - all users are treated
+ ** as anonymous, and all sessions are always valid.
  *******************************************************************************/
 public class FullyAnonymousAuthenticationModule implements QAuthenticationModuleInterface
 {
-   private static final Logger logger = LogManager.getLogger(FullyAnonymousAuthenticationModule.class);
-
-
 
    /*******************************************************************************
     **
@@ -51,7 +47,7 @@ public class FullyAnonymousAuthenticationModule implements QAuthenticationModule
       qUser.setFullName("Anonymous");
 
       QSession qSession = new QSession();
-      if (context.get("sessionId") != null)
+      if(context != null && context.get("sessionId") != null)
       {
          qSession.setIdReference(context.get("sessionId"));
       }
@@ -72,6 +68,10 @@ public class FullyAnonymousAuthenticationModule implements QAuthenticationModule
    @Override
    public boolean isSessionValid(QSession session)
    {
+      if(session == null)
+      {
+         return (false);
+      }
       return (true);
    }
 }

src/main/java/com/kingsrook/qqq/backend/core/state/TempFileStateProvider.java

@@ -23,6 +23,7 @@ package com.kingsrook.qqq.backend.core.state;
 
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.Serializable;
 import com.kingsrook.qqq.backend.core.utils.JsonUtils;
@@ -30,7 +31,7 @@ import org.apache.commons.io.FileUtils;
 
 
 /*******************************************************************************
- ** Singleton class that provides a (non-persistent!!) in-memory state provider.
+ ** State provider that uses files in the /tmp/ directory.
  *******************************************************************************/
 public class TempFileStateProvider implements StateProviderInterface
 {
@@ -92,9 +93,9 @@ public class TempFileStateProvider implements StateProviderInterface
          String json = FileUtils.readFileToString(new File("/tmp/" + key.toString()));
          return JsonUtils.toObject(json, type);
       }
-      catch(ClassCastException cce)
+      catch(FileNotFoundException fnfe)
       {
-         throw new RuntimeException("Stored state value could not be cast to desired type", cce);
+         return (null);
       }
       catch(IOException ie)
       {