#374 - Add GeneratedWhenCreated and GeneratedWhenModified marker interfaces etc - used to find bean properties with those behaviours

src/main/java/com/avaje/ebeaninternal/server/deploy/BeanDescriptor.java

@@ -994,6 +994,32 @@ public class BeanDescriptor<T> implements MetaBeanInfo {
     return deleteRecurseSkippable;
   }
 
+  /**
+   * Find a property annotated with @WhenCreated or @CreatedTimestamp.
+   */
+  public BeanProperty findWhenCreatedProperty() {
+
+    for (int i = 0; i < propertiesBaseScalar.length; i++) {
+      if (propertiesBaseScalar[i].isGeneratedWhenCreated()) {
+        return propertiesBaseScalar[i];
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Find a property annotated with @WhenModified or @UpdatedTimestamp.
+   */
+  public BeanProperty findWhenModifiedProperty() {
+
+    for (int i = 0; i < propertiesBaseScalar.length; i++) {
+      if (propertiesBaseScalar[i].isGeneratedWhenModified()) {
+        return propertiesBaseScalar[i];
+      }
+    }
+    return null;
+  }
+
   /**
    * Return the many property included in the query or null if one is not.
    */

src/main/java/com/avaje/ebeaninternal/server/deploy/BeanProperty.java

@@ -7,6 +7,8 @@ import com.avaje.ebean.config.dbplatform.DbType;
 import com.avaje.ebean.text.StringParser;
 import com.avaje.ebeaninternal.server.core.InternString;
 import com.avaje.ebeaninternal.server.deploy.generatedproperty.GeneratedProperty;
+import com.avaje.ebeaninternal.server.deploy.generatedproperty.GeneratedWhenCreated;
+import com.avaje.ebeaninternal.server.deploy.generatedproperty.GeneratedWhenModified;
 import com.avaje.ebeaninternal.server.deploy.meta.DeployBeanProperty;
 import com.avaje.ebeaninternal.server.el.ElPropertyChainBuilder;
 import com.avaje.ebeaninternal.server.el.ElPropertyValue;
@@ -864,6 +866,20 @@ public class BeanProperty implements ElPropertyValue {
     return isVersion() || (generatedProperty != null && generatedProperty.isDDLNotNullable());
   }
 
+  /**
+   * Return true if this is a generated property mapping to @WhenCreated or @CreatedTimestamp.
+   */
+  public boolean isGeneratedWhenCreated() {
+    return generatedProperty instanceof GeneratedWhenCreated;
+  }
+
+  /**
+   * Return true if this is a generated property mapping to @WhenModified or @UpdatedTimestamp.
+   */
+  public boolean isGeneratedWhenModified() {
+    return generatedProperty instanceof GeneratedWhenModified;
+  }
+
   /**
    * Return true if the DB column should be unique.
    */

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedInsertJavaTime.java

@@ -12,7 +12,7 @@ import java.time.ZonedDateTime;
  */
 public class GeneratedInsertJavaTime {
 
-  public static abstract class Base implements GeneratedProperty {
+  public static abstract class Base implements GeneratedProperty, GeneratedWhenCreated {
 
     @Override
     public boolean includeInUpdate() {

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedInsertJodaTime.java

@@ -11,7 +11,7 @@ import org.joda.time.DateTime;
  */
 public class GeneratedInsertJodaTime {
 
-  public static abstract class Base implements GeneratedProperty {
+  public static abstract class Base implements GeneratedProperty, GeneratedWhenCreated {
 
     @Override
     public boolean includeInUpdate() {

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedInsertTimestamp.java

@@ -8,7 +8,7 @@ import com.avaje.ebeaninternal.server.deploy.BeanProperty;
 /**
  * Used to generate a timestamp when a bean is inserted.
  */
-public class GeneratedInsertTimestamp implements GeneratedProperty {
+public class GeneratedInsertTimestamp implements GeneratedProperty, GeneratedWhenCreated {
 
     /**
      * Return the current time as a Timestamp.

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedUpdateJavaTime.java

@@ -12,7 +12,7 @@ import java.time.ZonedDateTime;
  */
 public class GeneratedUpdateJavaTime {
 
-  public static abstract class Base implements GeneratedProperty {
+  public static abstract class Base implements GeneratedProperty, GeneratedWhenModified {
 
     @Override
     public boolean includeInUpdate() {

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedUpdateJodaTime.java

@@ -11,7 +11,7 @@ import org.joda.time.DateTime;
  */
 public class GeneratedUpdateJodaTime {
 
-  public static abstract class Base implements GeneratedProperty {
+  public static abstract class Base implements GeneratedProperty, GeneratedWhenModified {
 
     @Override
     public boolean includeInUpdate() {

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedUpdateTimestamp.java

@@ -8,7 +8,7 @@ import com.avaje.ebeaninternal.server.deploy.BeanProperty;
 /**
  * Generate a Timestamp whenever the bean is inserted or updated.
  */
-public class GeneratedUpdateTimestamp implements GeneratedProperty {
+public class GeneratedUpdateTimestamp implements GeneratedProperty, GeneratedWhenModified {
 
     /**
      * Return now as a Timestamp.

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedWhenCreated.java

@@ -0,0 +1,7 @@
+package com.avaje.ebeaninternal.server.deploy.generatedproperty;
+
+/**
+ * Marker interface for all implementations mapping to @WhenCreated or @CreatedTimestamp.
+ */
+public interface GeneratedWhenCreated {
+}

src/main/java/com/avaje/ebeaninternal/server/deploy/generatedproperty/GeneratedWhenModified.java

@@ -0,0 +1,7 @@
+package com.avaje.ebeaninternal.server.deploy.generatedproperty;
+
+/**
+ * Marker interface for all implementations mapping to @WhenModified or @UpdatedTimestamp.
+ */
+public interface GeneratedWhenModified {
+}