#1634 - ENH: Add convenience expressions "greater than or null" gtOrNull(), ltOrNull() and inRangeWith()

src/main/java/io/ebeaninternal/server/expression/DefaultExpressionFactory.java

@@ -221,6 +221,11 @@ public class DefaultExpressionFactory implements SpiExpressionFactory {
     return new InRangeExpression(propertyName, value1, value2);
   }
 
+  @Override
+  public Expression inRangeWith(String lowProperty, String highProperty, Object value) {
+    return and(le(lowProperty, value), gtOrNull(highProperty, value));
+  }
+
   /**
    * Between - property between the two given values.
    */
@@ -245,6 +250,14 @@ public class DefaultExpressionFactory implements SpiExpressionFactory {
     return new SimpleExpression(propertyName, Op.GT, value);
   }
 
+  /**
+   * Greater Than or null - property greater than the given value or null.
+   */
+  @Override
+  public Expression gtOrNull(String propertyName, Object value) {
+    return or(gt(propertyName, value), isNull(propertyName));
+  }
+
   /**
    * Greater Than or Equal to - property greater than or equal to the given
    * value.
@@ -254,6 +267,14 @@ public class DefaultExpressionFactory implements SpiExpressionFactory {
     return new SimpleExpression(propertyName, Op.GT_EQ, value);
   }
 
+  /**
+   * Less Than or null - property less than the given value or null.
+   */
+  @Override
+  public Expression ltOrNull(String propertyName, Object value) {
+    return or(lt(propertyName, value), isNull(propertyName));
+  }
+
   /**
    * Less Than - property less than the given value.
    */