diff --git a/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/QSecretReaderTest.java b/src/main/java/com/kingsrook/qqq/backend/core/instances/InterpretableFields.java
similarity index 50%
rename from src/test/java/com/kingsrook/qqq/backend/core/model/metadata/QSecretReaderTest.java
rename to src/main/java/com/kingsrook/qqq/backend/core/instances/InterpretableFields.java
index 91124829..ac26d6d2 100644
--- a/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/QSecretReaderTest.java
+++ b/src/main/java/com/kingsrook/qqq/backend/core/instances/InterpretableFields.java
@@ -19,37 +19,22 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.kingsrook.qqq.backend.core.model.metadata;
+package com.kingsrook.qqq.backend.core.instances;
 
 
-import java.util.Map;
-import org.junit.jupiter.api.Test;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNull;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 
 
 /*******************************************************************************
- ** Unit test for QSecretReader
+ ** Class-level annotation to declare what fields should run through the variable
+ ** interpreter - e.g., to be replaced with env-var values at run-time.
  *******************************************************************************/
-class QSecretReaderTest
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface InterpretableFields
 {
-
-   /*******************************************************************************
-    **
-    *******************************************************************************/
-   @Test
-   void testReadSecret()
-   {
-      QSecretReader secretReader = new QSecretReader();
-      String        key          = "CUSTOM_PROPERTY";
-      String        value        = "ABCD-9876";
-      secretReader.setCustomEnvironment(Map.of(key, value));
-
-      assertNull(secretReader.readSecret(null));
-      assertEquals("foo", secretReader.readSecret("foo"));
-      assertNull(secretReader.readSecret("${env.NOT-" + key + "}"));
-      assertEquals(value, secretReader.readSecret("${env." + key + "}"));
-      assertEquals("${env.NOT-" + key, secretReader.readSecret("${env.NOT-" + key));
-   }
-
-}
\ No newline at end of file
+   String[] fieldNames() default {};
+}
diff --git a/src/main/java/com/kingsrook/qqq/backend/core/instances/QMetaDataVariableInterpreter.java b/src/main/java/com/kingsrook/qqq/backend/core/instances/QMetaDataVariableInterpreter.java
new file mode 100644
index 00000000..67030473
--- /dev/null
+++ b/src/main/java/com/kingsrook/qqq/backend/core/instances/QMetaDataVariableInterpreter.java
@@ -0,0 +1,172 @@
+/*
+ * 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.instances;
+
+
+import java.lang.reflect.Method;
+import java.util.Locale;
+import java.util.Map;
+import com.kingsrook.qqq.backend.core.exceptions.QException;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+
+/*******************************************************************************
+ ** To avoid having secrets (passwords, access keys, etc) committed into meta data
+ ** files, as well as to just let some meta data not be hard-coded, this class is
+ ** used by the Enricher to "promote" values, such as ${env.ACCESS_KEY}
+ ** to be read from the environment (or other secret providers (to be implemented)).
+ **
+ ** Supported syntax / value sources are:
+ ** ${env.VAR} = system environment variables, e.g., export VAR=val
+ ** ${prop.VAR} = properties, e.g., -DVAR=val
+ ** ${literal.VAR} = get back a literal "VAR" (in case VAR matches some of the other supported syntax in here)
+ *******************************************************************************/
+public class QMetaDataVariableInterpreter
+{
+   private static final Logger LOG = LogManager.getLogger(QMetaDataVariableInterpreter.class);
+
+   private Map<String, String> customEnvironment;
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   public void interpretObject(Object o) throws QException
+   {
+      ///////////////////////////////////////////////////////////////////////////////////////////////////
+      // get the InterpretableFields from the object's class - exiting if the annotation isn't present //
+      ///////////////////////////////////////////////////////////////////////////////////////////////////
+      InterpretableFields interpretableFields = o.getClass().getAnnotation(InterpretableFields.class);
+      if(interpretableFields == null)
+      {
+         return;
+      }
+
+      //////////////////////////////////////////////////////////
+      // iterate over interpretable fields, interpreting each //
+      //////////////////////////////////////////////////////////
+      for(String fieldName : interpretableFields.fieldNames())
+      {
+         try
+         {
+            ///////////////////////////////////////////////////////////////////////////////////////
+            // get the getter & setter methods for the field (getMethod will throw if not found) //
+            // enforce Strings-only at this time.                                                //
+            ///////////////////////////////////////////////////////////////////////////////////////
+            String   fieldNameUcFirst = fieldName.substring(0, 1).toUpperCase(Locale.ROOT) + fieldName.substring(1);
+            Method   getter           = o.getClass().getMethod("get" + fieldNameUcFirst);
+            Class<?> fieldType        = getter.getReturnType();
+            if(!fieldType.equals(String.class))
+            {
+               throw new QException("Interpretable field: " + fieldName + " on class " + o.getClass() + " is not a String (which is required at this time)");
+            }
+            Method setter = o.getClass().getMethod("set" + fieldNameUcFirst, fieldType);
+
+            //////////////////////////////////////////////////////////////////////////////////////////////
+            // get the value - if it's null, move on, else, interpret it, and put it back in the object //
+            //////////////////////////////////////////////////////////////////////////////////////////////
+            Object value  = getter.invoke(o);
+            if(value == null)
+            {
+               continue;
+            }
+            String interpreted = interpret((String) value);
+            setter.invoke(o, interpreted);
+         }
+         catch(Exception e)
+         {
+            throw (new QException("Error interpreting variables in object " + o, e));
+         }
+      }
+   }
+
+
+
+   /*******************************************************************************
+    ** Interpret a value string, which may be a variable, into its run-time value.
+    **
+    ** If input is null, output is null.
+    ** If input looks like ${env.X}, then the return value is the value of the env variable 'X'
+    ** If input looks like ${prop.X}, then the return value is the value of the system property 'X'
+    ** If input looks like ${literal.X}, then the return value is the literal 'X'
+    **  - used if you really want to get back the literal value, ${env.X}, for example.
+    ** Else the output is the input.
+    *******************************************************************************/
+   public String interpret(String value)
+   {
+      if(value == null)
+      {
+         return (null);
+      }
+
+      if(value.startsWith("${env.") && value.endsWith("}"))
+      {
+         String envVarName = value.substring(6).replaceFirst("}$", "");
+         String envValue   = getEnvironment().get(envVarName);
+         return (envValue);
+      }
+
+      if(value.startsWith("${prop.") && value.endsWith("}"))
+      {
+         String propertyName  = value.substring(7).replaceFirst("}$", "");
+         String propertyValue = System.getProperty(propertyName);
+         return (propertyValue);
+      }
+
+      if(value.startsWith("${literal.") && value.endsWith("}"))
+      {
+         String literalValue = value.substring(10).replaceFirst("}$", "");
+         return (literalValue);
+      }
+
+      return (value);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for customEnvironment - protected - meant to be called (at least at this
+    ** time), only in unit test
+    **
+    *******************************************************************************/
+   protected void setCustomEnvironment(Map<String, String> customEnvironment)
+   {
+      this.customEnvironment = customEnvironment;
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private Map<String, String> getEnvironment()
+   {
+      if(this.customEnvironment != null)
+      {
+         return (this.customEnvironment);
+      }
+
+      return System.getenv();
+   }
+}
diff --git a/src/main/java/com/kingsrook/qqq/backend/core/model/actions/processes/RunProcessResult.java b/src/main/java/com/kingsrook/qqq/backend/core/model/actions/processes/RunProcessResult.java
index 99f594e4..7415563d 100644
--- a/src/main/java/com/kingsrook/qqq/backend/core/model/actions/processes/RunProcessResult.java
+++ b/src/main/java/com/kingsrook/qqq/backend/core/model/actions/processes/RunProcessResult.java
@@ -36,7 +36,21 @@ import com.kingsrook.qqq.backend.core.model.data.QRecord;
 public class RunProcessResult extends AbstractQResult
 {
    private ProcessState processState;
-   private String error;
+   private String       error;
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Override
+   public String toString()
+   {
+      return "RunProcessResult{error='" + error
+         + ",records.size()=" + (processState == null ? null : processState.getRecords().size())
+         + ",values=" + (processState == null ? null : processState.getValues())
+         + "}";
+   }
 
 
 
diff --git a/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/QSecretReader.java b/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/QSecretReader.java
deleted file mode 100644
index 4b4ea3bc..00000000
--- a/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/QSecretReader.java
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * 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.model.metadata;
-
-
-import java.util.Map;
-
-
-/*******************************************************************************
- ** To avoid having secrets (passwords, access keys, etc) committed into meta data
- ** files, this class is used by the Enricher to "promote" values, such as ${env.ACCESS_KEY}
- ** to be read from the environment (or other secret providers (to be implemented)).
- *******************************************************************************/
-public class QSecretReader
-{
-   private Map<String, String> customEnvironment;
-
-
-
-   /*******************************************************************************
-    ** Translate a secret.
-    **
-    ** If input is null, output is null.
-    ** If input looks like ${env.X}, then the return value is the value of the env variable 'X'
-    ** Else the output is the input.
-    *******************************************************************************/
-   public String readSecret(String value)
-   {
-      if(value == null)
-      {
-         return (null);
-      }
-
-      if(value.startsWith("${env.") && value.endsWith("}"))
-      {
-         String envVarName = value.substring(6).replaceFirst("}$", "");
-         String envValue   = getEnvironment().get(envVarName);
-         return (envValue);
-      }
-
-      return (value);
-   }
-
-
-
-   /*******************************************************************************
-    ** Setter for customEnvironment - protected - meant to be called (at least at this
-    ** time), only in unit test
-    **
-    *******************************************************************************/
-   protected void setCustomEnvironment(Map<String, String> customEnvironment)
-   {
-      this.customEnvironment = customEnvironment;
-   }
-
-
-
-   /*******************************************************************************
-    **
-    *******************************************************************************/
-   private Map<String, String> getEnvironment()
-   {
-      if(this.customEnvironment != null)
-      {
-         return (this.customEnvironment);
-      }
-
-      return System.getenv();
-   }
-}
diff --git a/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLLoadFunction.java b/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLLoadFunction.java
index 23380e56..350db227 100644
--- a/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLLoadFunction.java
+++ b/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLLoadFunction.java
@@ -22,6 +22,7 @@
 package com.kingsrook.qqq.backend.core.processes.implementations.etl.basic;
 
 
+import java.util.ArrayList;
 import java.util.List;
 import com.kingsrook.qqq.backend.core.actions.InsertAction;
 import com.kingsrook.qqq.backend.core.exceptions.QException;
@@ -32,6 +33,8 @@ import com.kingsrook.qqq.backend.core.model.actions.processes.RunFunctionRequest
 import com.kingsrook.qqq.backend.core.model.actions.processes.RunFunctionResult;
 import com.kingsrook.qqq.backend.core.model.data.QRecord;
 import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 
 /*******************************************************************************
@@ -39,13 +42,22 @@ import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
  *******************************************************************************/
 public class BasicETLLoadFunction implements FunctionBody
 {
+   private static final Logger LOG = LogManager.getLogger(BasicETLLoadFunction.class);
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
    @Override
    public void run(RunFunctionRequest runFunctionRequest, RunFunctionResult runFunctionResult) throws QException
    {
       //////////////////////////////////////////////////////
       // exit early with no-op if no records made it here //
       //////////////////////////////////////////////////////
-      if(CollectionUtils.nullSafeIsEmpty(runFunctionRequest.getRecords()))
+      List<QRecord> inputRecords = runFunctionRequest.getRecords();
+      LOG.info("Received [" + inputRecords.size() + "] records to load");
+      if(CollectionUtils.nullSafeIsEmpty(inputRecords))
       {
          runFunctionResult.addValue(BasicETLProcess.FIELD_RECORD_COUNT, 0);
          return;
@@ -55,7 +67,7 @@ public class BasicETLLoadFunction implements FunctionBody
       // put the destination table name in all records being inserted //
       //////////////////////////////////////////////////////////////////
       String table = runFunctionRequest.getValueString(BasicETLProcess.FIELD_DESTINATION_TABLE);
-      for(QRecord record : runFunctionRequest.getRecords())
+      for(QRecord record : inputRecords)
       {
          record.setTableName(table);
       }
@@ -63,16 +75,26 @@ public class BasicETLLoadFunction implements FunctionBody
       //////////////////////////////////////////
       // run an insert request on the records //
       //////////////////////////////////////////
-      InsertRequest insertRequest = new InsertRequest(runFunctionRequest.getInstance());
-      insertRequest.setSession(runFunctionRequest.getSession());
-      insertRequest.setTableName(table);
-      insertRequest.setRecords(runFunctionRequest.getRecords());
+      int           recordsInserted = 0;
+      List<QRecord> outputRecords   = new ArrayList<>();
+      int           pageSize        = 1000; // todo - make this a field?
 
-      InsertAction insertAction = new InsertAction();
-      InsertResult insertResult = insertAction.execute(insertRequest);
+      for(List<QRecord> page : CollectionUtils.getPages(inputRecords, pageSize))
+      {
+         LOG.info("Inserting a page of [" + page.size() + "] records. Progress:  " + recordsInserted + " loaded out of " + inputRecords.size() + " total");
+         InsertRequest insertRequest = new InsertRequest(runFunctionRequest.getInstance());
+         insertRequest.setSession(runFunctionRequest.getSession());
+         insertRequest.setTableName(table);
+         insertRequest.setRecords(page);
 
-      runFunctionResult.setRecords(insertResult.getRecords());
-      runFunctionResult.addValue(BasicETLProcess.FIELD_RECORD_COUNT, insertResult.getRecords().size());
+         InsertAction insertAction = new InsertAction();
+         InsertResult insertResult = insertAction.execute(insertRequest);
+         outputRecords.addAll(insertResult.getRecords());
+
+         recordsInserted += insertResult.getRecords().size();
+      }
+      runFunctionResult.setRecords(outputRecords);
+      runFunctionResult.addValue(BasicETLProcess.FIELD_RECORD_COUNT, recordsInserted);
    }
 
 }
diff --git a/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLTransformFunction.java b/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLTransformFunction.java
index 9783e638..88bd9be5 100644
--- a/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLTransformFunction.java
+++ b/src/main/java/com/kingsrook/qqq/backend/core/processes/implementations/etl/basic/BasicETLTransformFunction.java
@@ -22,6 +22,7 @@
 package com.kingsrook.qqq.backend.core.processes.implementations.etl.basic;
 
 
+import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.List;
 import com.kingsrook.qqq.backend.core.adapters.JsonToQFieldMappingAdapter;
@@ -33,9 +34,12 @@ import com.kingsrook.qqq.backend.core.model.actions.shared.mapping.AbstractQFiel
 import com.kingsrook.qqq.backend.core.model.actions.shared.mapping.QKeyBasedFieldMapping;
 import com.kingsrook.qqq.backend.core.model.data.QRecord;
 import com.kingsrook.qqq.backend.core.model.metadata.QFieldMetaData;
+import com.kingsrook.qqq.backend.core.model.metadata.QFieldType;
 import com.kingsrook.qqq.backend.core.model.metadata.QTableMetaData;
 import com.kingsrook.qqq.backend.core.utils.CollectionUtils;
 import com.kingsrook.qqq.backend.core.utils.StringUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 
 /*******************************************************************************
@@ -43,6 +47,8 @@ import com.kingsrook.qqq.backend.core.utils.StringUtils;
  *******************************************************************************/
 public class BasicETLTransformFunction implements FunctionBody
 {
+   private static final Logger LOG = LogManager.getLogger(BasicETLTransformFunction.class);
+
    @Override
    public void run(RunFunctionRequest runFunctionRequest, RunFunctionResult runFunctionResult) throws QException
    {
@@ -72,11 +78,49 @@ public class BasicETLTransformFunction implements FunctionBody
       String         tableName     = runFunctionRequest.getValueString(BasicETLProcess.FIELD_DESTINATION_TABLE);
       QTableMetaData table         = runFunctionRequest.getInstance().getTable(tableName);
       List<QRecord>  mappedRecords = applyMapping(runFunctionRequest.getRecords(), table, keyBasedFieldMapping);
+
+      removeNonNumericValuesFromMappedRecords(table, mappedRecords);
+
       runFunctionResult.setRecords(mappedRecords);
    }
 
 
 
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   private void removeNonNumericValuesFromMappedRecords(QTableMetaData table, List<QRecord> records)
+   {
+      for(QRecord record : records)
+      {
+         for(QFieldMetaData field : table.getFields().values())
+         {
+            Object value = record.getValue(field.getName());
+            if(value != null && StringUtils.hasContent(String.valueOf(value)))
+            {
+               try
+               {
+                  if(field.getType().equals(QFieldType.INTEGER))
+                  {
+                     Integer.parseInt(String.valueOf(value));
+                  }
+                  else if(field.getType().equals(QFieldType.DECIMAL))
+                  {
+                     new BigDecimal(String.valueOf(value));
+                  }
+               }
+               catch(NumberFormatException nfe)
+               {
+                  LOG.info("Removing non-numeric value [" + value + "] from field [" + field.getName() + "]");
+                  record.setValue(field.getName(), null);
+               }
+            }
+         }
+      }
+   }
+
+
+
    /*******************************************************************************
     **
     *******************************************************************************/
diff --git a/src/test/java/com/kingsrook/qqq/backend/core/instances/QMetaDataVariableInterpreterTest.java b/src/test/java/com/kingsrook/qqq/backend/core/instances/QMetaDataVariableInterpreterTest.java
new file mode 100644
index 00000000..e3881b00
--- /dev/null
+++ b/src/test/java/com/kingsrook/qqq/backend/core/instances/QMetaDataVariableInterpreterTest.java
@@ -0,0 +1,281 @@
+/*
+ * 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.instances;
+
+
+import java.util.Map;
+import com.kingsrook.qqq.backend.core.exceptions.QException;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+
+/*******************************************************************************
+ ** Unit test for QSecretReader
+ *******************************************************************************/
+class QMetaDataVariableInterpreterTest
+{
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @BeforeEach
+   public void beforeEach()
+   {
+      System.setProperty("username", "joe");
+      System.setProperty("password", "b1d3n");
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @AfterEach
+   public void afterEach()
+   {
+      System.clearProperty("username");
+      System.clearProperty("password");
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testInterpretObject() throws QException
+   {
+      GoodTestClass goodTestClass = new GoodTestClass();
+      goodTestClass.setUsername("${prop.username}");
+      goodTestClass.setPassword("${prop.password}");
+
+      new QMetaDataVariableInterpreter().interpretObject(goodTestClass);
+
+      assertEquals("joe", goodTestClass.getUsername());
+      assertEquals("b1d3n", goodTestClass.getPassword());
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testBadAnnotatedObjects()
+   {
+      assertThrows(QException.class, () -> new QMetaDataVariableInterpreter().interpretObject(new BadTestClassAnnotatedInteger()));
+      assertThrows(QException.class, () -> new QMetaDataVariableInterpreter().interpretObject(new BadTestClassNoGetter()));
+      assertThrows(QException.class, () -> new QMetaDataVariableInterpreter().interpretObject(new BadTestClassNoSetter()));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testInterpretFromEnvironment()
+   {
+      QMetaDataVariableInterpreter secretReader = new QMetaDataVariableInterpreter();
+      String                       key          = "CUSTOM_PROPERTY";
+      String                       value        = "ABCD-9876";
+      secretReader.setCustomEnvironment(Map.of(key, value));
+
+      assertNull(secretReader.interpret(null));
+      assertEquals("foo", secretReader.interpret("foo"));
+      assertNull(secretReader.interpret("${env.NOT-" + key + "}"));
+      assertEquals(value, secretReader.interpret("${env." + key + "}"));
+      assertEquals("${env.NOT-" + key, secretReader.interpret("${env.NOT-" + key));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testInterpretFromProperties()
+   {
+      QMetaDataVariableInterpreter secretReader = new QMetaDataVariableInterpreter();
+      String                       key          = "MY_PROPERTY";
+      String                       value        = "WXYZ-6789";
+      System.setProperty(key, value);
+
+      assertNull(secretReader.interpret(null));
+      assertEquals("foo", secretReader.interpret("foo"));
+      assertNull(secretReader.interpret("${prop.NOT-" + key + "}"));
+      assertEquals(value, secretReader.interpret("${prop." + key + "}"));
+      assertEquals("${prop.NOT-" + key, secretReader.interpret("${prop.NOT-" + key));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testInterpretLiterals()
+   {
+      QMetaDataVariableInterpreter secretReader = new QMetaDataVariableInterpreter();
+      assertEquals("${env.X}", secretReader.interpret("${literal.${env.X}}"));
+      assertEquals("${prop.X}", secretReader.interpret("${literal.${prop.X}}"));
+      assertEquals("${literal.X}", secretReader.interpret("${literal.${literal.X}}"));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @InterpretableFields(fieldNames = { "username", "password" })
+   public static class GoodTestClass
+   {
+      private String username;
+      private String password;
+
+
+
+      /*******************************************************************************
+       ** Getter for username
+       **
+       *******************************************************************************/
+      public String getUsername()
+      {
+         return username;
+      }
+
+
+
+      /*******************************************************************************
+       ** Setter for username
+       **
+       *******************************************************************************/
+      public void setUsername(String username)
+      {
+         this.username = username;
+      }
+
+
+
+      /*******************************************************************************
+       ** Getter for password
+       **
+       *******************************************************************************/
+      public String getPassword()
+      {
+         return password;
+      }
+
+
+
+      /*******************************************************************************
+       ** Setter for password
+       **
+       *******************************************************************************/
+      public void setPassword(String password)
+      {
+         this.password = password;
+      }
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @InterpretableFields(fieldNames = { "port" })
+   public static class BadTestClassAnnotatedInteger
+   {
+      private Integer port;
+
+
+
+      /*******************************************************************************
+       ** Getter for port
+       **
+       *******************************************************************************/
+      public Integer getPort()
+      {
+         return port;
+      }
+
+
+
+      /*******************************************************************************
+       ** Setter for port
+       **
+       *******************************************************************************/
+      public void setPort(Integer port)
+      {
+         this.port = port;
+      }
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @InterpretableFields(fieldNames = { "foo" })
+   public static class BadTestClassNoGetter
+   {
+      private String foo;
+
+
+
+      /*******************************************************************************
+       ** Setter for foo
+       **
+       *******************************************************************************/
+      public void setFoo(String foo)
+      {
+         this.foo = foo;
+      }
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @InterpretableFields(fieldNames = { "foo" })
+   public static class BadTestClassNoSetter
+   {
+      private String foo;
+
+
+
+      /*******************************************************************************
+       ** Getter for foo
+       **
+       *******************************************************************************/
+      public String getFoo()
+      {
+         return foo;
+      }
+   }
+
+}
\ No newline at end of file