Make Query.Property parameterised with <BT> "Base Type" as Number, String, Temporal, Boolean or Object

These types then determine which functions are valid for the types. So:
- Number functions
- String/varchar functions
- Temporal Date, DateTime, Time functions
- Boolean functions
- Object being everything else

ebean-querybean/src/main/java/io/ebean/typequery/PArray.java

@@ -6,7 +6,7 @@ package io.ebean.typequery;
  * @param <R> the root query bean type
  * @param <E> the element type of the DbArray
  */
-public final class PArray<R, E> extends TQPropertyBase<R> {
+public final class PArray<R, E> extends TQPropertyBase<R, E> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PBaseCompareable.java

@@ -6,11 +6,11 @@ import io.ebean.Query;
 /**
  * Base property for all comparable types.
  *
- * @param <R> the root query bean type
- * @param <T> the type of the scalar property
+ * @param <R>  the root query bean type
+ * @param <T>  the type of the scalar property
+ * @param <BT> the base type of the property
  */
-@SuppressWarnings("rawtypes")
-public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
+public abstract class PBaseCompareable<R, T, BT> extends PBaseValueEqual<R, T, BT> {
 
   /**
    * Construct with a property name and root instance.
@@ -44,11 +44,14 @@ public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
 
   /**
    * Greater than other property.
+   * <p>
+   * Note that the other property must have the same common "Base type" (String, Number, Temporal, Boolean or Object).
    *
    * @param other the other property to compare
+   *
    * @return the root query bean instance
    */
-  public final R gt(TQProperty<?> other) {
+  public final R gt(TQProperty<?, BT> other) {
     expr().raw(_name + " > " + other.propertyName());
     return _root;
   }
@@ -81,7 +84,7 @@ public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
    * @param other the other property to compare
    * @return the root query bean instance
    */
-  public final R ge(TQProperty<?> other) {
+  public final R ge(TQProperty<?, BT> other) {
     expr().raw(_name + " >= " + other.propertyName());
     return _root;
   }
@@ -114,7 +117,7 @@ public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
    * @param other the other property to compare
    * @return the root query bean instance
    */
-  public final R lt(TQProperty<?> other) {
+  public final R lt(TQProperty<?, BT> other) {
     expr().raw(_name + " < " + other.propertyName());
     return _root;
   }
@@ -147,7 +150,7 @@ public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
    * @param other the other property to compare
    * @return the root query bean instance
    */
-  public final R le(TQProperty<?> other) {
+  public final R le(TQProperty<?, BT> other) {
     expr().raw(_name + " <= " + other.propertyName());
     return _root;
   }
@@ -197,7 +200,7 @@ public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
    * The most common use of this could be called "effective dating" where 2 date or
    * timestamp columns represent the date range in which
    */
-  public final R inRangeWith(TQProperty<R> highProperty, T value) {
+  public final R inRangeWith(TQProperty<?, BT> highProperty, T value) {
     expr().inRangeWith(_name, highProperty._name, value);
     return _root;
   }
@@ -220,7 +223,7 @@ public class PBaseCompareable<R, T> extends PBaseValueEqual<R, T> {
    * <p>
    * This is a convenience expression combining a number of simple expressions.
    */
-  public final R inRangeWith(TQProperty<?> lowProperty, TQProperty<?> highProperty) {
+  public final R inRangeWith(TQProperty<?, BT> lowProperty, TQProperty<?, BT> highProperty) {
     expr().inRangeWithProperties(_name, lowProperty.propertyName(), highProperty.propertyName());
     return _root;
   }

ebean-querybean/src/main/java/io/ebean/typequery/PBaseDate.java

@@ -1,5 +1,7 @@
 package io.ebean.typequery;
 
+import java.time.temporal.Temporal;
+
 /**
  * Base property for date and date time types.
  *
@@ -7,7 +9,7 @@ package io.ebean.typequery;
  * @param <D> the date time type
  */
 @SuppressWarnings("rawtypes")
-public abstract class PBaseDate<R, D extends Comparable> extends PBaseCompareable<R, D> {
+public abstract class PBaseDate<R, D extends Comparable> extends PBaseCompareable<R, D, Temporal> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PBaseNumber.java

@@ -7,7 +7,7 @@ package io.ebean.typequery;
  * @param <T> the number type
  */
 @SuppressWarnings("rawtypes")
-public abstract class PBaseNumber<R,T extends Comparable> extends PBaseCompareable<R,T> {
+public abstract class PBaseNumber<R, T extends Comparable> extends PBaseCompareable<R, T, Number> {
 
   /**
    * Construct with a property name and root instance.
@@ -16,7 +16,7 @@ public abstract class PBaseNumber<R,T extends Comparable> extends PBaseCompareab
    * @param root the root query bean instance
    */
   public PBaseNumber(String name, R root) {
-    super(name , root);
+    super(name, root);
   }
 
   /**

ebean-querybean/src/main/java/io/ebean/typequery/PBaseString.java

@@ -5,7 +5,7 @@ package io.ebean.typequery;
  *
  * @param <R> the root query bean type
  */
-public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
+public abstract class PBaseString<R, T> extends PBaseCompareable<R, T, String> {
 
   /**
    * Construct with a property name and root instance.
@@ -25,22 +25,28 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   }
 
   /**
+   * Deprecated migrate to eq().
+   * <p>
    * Is equal to. The same as <code>eq</code> but uses the strong type as argument rather than String.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
    */
+  @Deprecated
   public final R equalToType(T value) {
     expr().eq(_name, value);
     return _root;
   }
 
   /**
+   * Deprecated migrate to ne().
+   * <p>
    * Is not equal to. The same as <code>ne</code> but uses the strong type as argument rather than String.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
    */
+  @Deprecated
   public final R notEqualToType(T value) {
     expr().ne(_name, value);
     return _root;
@@ -49,7 +55,146 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   //  common string / expressions ------------
 
   /**
-   * Case insensitive is equal to.
+   * Equal to.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R eq(String value) {
+    expr().eq(_name, value);
+    return _root;
+  }
+
+  /**
+   * Not equal to.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R ne(String value) {
+    expr().ne(_name, value);
+    return _root;
+  }
+
+  /**
+   * Greater than.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R gt(String value) {
+    expr().gt(_name, value);
+    return _root;
+  }
+
+  /**
+   * Greater than OR Null.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R gtOrNull(String value) {
+    expr().gtOrNull(_name, value);
+    return _root;
+  }
+
+  /**
+   * Greater than or Equal to.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R ge(String value) {
+    expr().ge(_name, value);
+    return _root;
+  }
+
+  /**
+   * Greater than or Equal to OR Null.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R geOrNull(String value) {
+    expr().geOrNull(_name, value);
+    return _root;
+  }
+
+  /**
+   * Less than.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R lt(String value) {
+    expr().lt(_name, value);
+    return _root;
+  }
+
+  /**
+   * Less than OR Null.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R ltOrNull(String value) {
+    expr().ltOrNull(_name, value);
+    return _root;
+  }
+
+  /**
+   * Less than or Equal to.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R le(String value) {
+    expr().le(_name, value);
+    return _root;
+  }
+
+  /**
+   * Less than or Equal to OR null.
+   *
+   * @param value the bind value
+   * @return the root query bean instance
+   */
+  public final R leOrNull(String value) {
+    expr().leOrNull(_name, value);
+    return _root;
+  }
+
+  /**
+   * Greater or equal to lower value and strictly less than upper value.
+   * <p>
+   * This is generally preferable over Between for date and datetime types
+   * as SQL Between is inclusive on the upper bound ({@code <= }) and generally
+   * we need the upper bound to be exclusive ({@code < }).
+   * </p>
+   *
+   * @param lower the lower bind value ({@code >= })
+   * @param upper the upper bind value ({@code < })
+   * @return the root query bean instance
+   */
+  public final R inRange(String lower, String upper) {
+    expr().inRange(_name, lower, upper);
+    return _root;
+  }
+
+  /**
+   * Between lower and upper values.
+   *
+   * @param lower the lower bind value
+   * @param upper the upper bind value
+   * @return the root query bean instance
+   */
+  public final R between(String lower, String upper) {
+    expr().between(_name, lower, upper);
+    return _root;
+  }
+
+  /**
+   * Case-insensitive is equal to.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
@@ -60,7 +205,7 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   }
 
   /**
-   * Case insensitive is equal to.
+   * Case-insensitive is equal to.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
@@ -115,7 +260,7 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   }
 
   /**
-   * Case insensitive like.
+   * Case-insensitive like.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
@@ -126,7 +271,7 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   }
 
   /**
-   * Case insensitive starts with.
+   * Case-insensitive starts with.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
@@ -137,7 +282,7 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   }
 
   /**
-   * Case insensitive ends with.
+   * Case-insensitive ends with.
    *
    * @param value the equal to bind value
    * @return the root query bean instance
@@ -148,7 +293,7 @@ public abstract class PBaseString<R,T> extends PBaseCompareable<R, String> {
   }
 
   /**
-   * Case insensitive contains.
+   * Case-insensitive contains.
    *
    * @param value the equal to bind value
    * @return the root query bean instance

ebean-querybean/src/main/java/io/ebean/typequery/PBaseTime.java

@@ -0,0 +1,52 @@
+package io.ebean.typequery;
+
+import java.time.temporal.Temporal;
+
+/**
+ * Base property for time types.
+ *
+ * @param <R> the root query bean type
+ * @param <T> the number type
+ */
+@SuppressWarnings("rawtypes")
+public abstract class PBaseTime<R, T extends Comparable> extends PBaseCompareable<R, T, Temporal> {
+
+  /**
+   * Construct with a property name and root instance.
+   *
+   * @param name property name
+   * @param root the root query bean instance
+   */
+  public PBaseTime(String name, R root) {
+    super(name, root);
+  }
+
+  /**
+   * Construct with additional path prefix.
+   */
+  public PBaseTime(String name, R root, String prefix) {
+    super(name, root, prefix);
+  }
+
+  /**
+   * Same as greater than.
+   *
+   * @param value the equal to bind value
+   * @return the root query bean instance
+   */
+  public final R after(T value) {
+    expr().gt(_name, value);
+    return _root;
+  }
+
+  /**
+   * Same as less than.
+   *
+   * @param value the equal to bind value
+   * @return the root query bean instance
+   */
+  public final R before(T value) {
+    expr().lt(_name, value);
+    return _root;
+  }
+}

ebean-querybean/src/main/java/io/ebean/typequery/PBaseValueEqual.java

@@ -11,7 +11,7 @@ import java.util.Collection;
  * @param <R> the root query bean type
  * @param <T> the number type
  */
-public abstract class PBaseValueEqual<R, T> extends TQPropertyBase<R> {
+public abstract class PBaseValueEqual<R, T, BT> extends TQPropertyBase<R, BT> {
 
   /**
    * Construct with a property name and root instance.
@@ -89,7 +89,7 @@ public abstract class PBaseValueEqual<R, T> extends TQPropertyBase<R> {
    * @param other the other property to compare
    * @return the root query bean instance
    */
-  public final R eq(TQProperty<?> other) {
+  public final R eq(TQProperty<?, BT> other) {
     expr().raw(_name + " = " + other.propertyName());
     return _root;
   }
@@ -152,7 +152,7 @@ public abstract class PBaseValueEqual<R, T> extends TQPropertyBase<R> {
    * @param other the other property to compare
    * @return the root query bean instance
    */
-  public final R ne(TQProperty<?> other) {
+  public final R ne(TQProperty<?, BT> other) {
     expr().raw(_name + " <> " + other.propertyName());
     return _root;
   }

ebean-querybean/src/main/java/io/ebean/typequery/PBoolean.java

@@ -5,7 +5,7 @@ package io.ebean.typequery;
  *
  * @param <R> the root query bean type
  */
-public final class PBoolean<R> extends PBaseValueEqual<R, Boolean> {
+public final class PBoolean<R> extends PBaseValueEqual<R, Boolean, Boolean> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PByteArray.java

@@ -5,7 +5,7 @@ package io.ebean.typequery;
  *
  * @param <R> the root query bean type
  */
-public final class PByteArray<R> extends PBaseValueEqual<R, byte[]> {
+public final class PByteArray<R> extends PBaseValueEqual<R, byte[], Object> {
 
   /**
    * Construct with a property name and root instance.
@@ -24,5 +24,4 @@ public final class PByteArray<R> extends PBaseValueEqual<R, byte[]> {
     super(name, root, prefix);
   }
 
-
 }

ebean-querybean/src/main/java/io/ebean/typequery/PCidr.java

@@ -7,7 +7,7 @@ import io.ebean.types.Cidr;
  *
  * @param <R> the root query bean type
  */
-public final class PCidr<R> extends PBaseValueEqual<R, Cidr> {
+public final class PCidr<R> extends PBaseString<R, Cidr> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PCurrency.java

@@ -7,7 +7,7 @@ import java.util.Currency;
  *
  * @param <R> the root query bean type
  */
-public final class PCurrency<R> extends PBaseValueEqual<R,Currency> {
+public final class PCurrency<R> extends PBaseString<R, Currency> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PEnum.java

@@ -1,12 +1,12 @@
 package io.ebean.typequery;
 
 /**
- * BigDecimal property.
+ * Enum property.
  *
  * @param <E> the enum specific type
  * @param <R> the root query bean type
  */
-public final class PEnum<R,E> extends PBaseValueEqual<R,E> {
+public final class PEnum<R, E> extends PBaseValueEqual<R, E, Object> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PFile.java

@@ -9,7 +9,7 @@ package io.ebean.typequery;
  *
  * @param <R> the root query bean type
  */
-public final class PFile<R> extends TQPropertyBase<R> {
+public final class PFile<R> extends TQPropertyBase<R, Object> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PInet.java

@@ -7,7 +7,7 @@ import io.ebean.types.Inet;
  *
  * @param <R> the root query bean type
  */
-public final class PInet<R> extends PBaseValueEqual<R, Inet> {
+public final class PInet<R> extends PBaseString<R, Inet> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PInetAddress.java

@@ -7,8 +7,7 @@ import java.net.InetAddress;
  *
  * @param <R> the root query bean type
  */
-
-public final class PInetAddress<R> extends PBaseValueEqual<R,InetAddress> {
+public final class PInetAddress<R> extends PBaseString<R, InetAddress> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PJodaLocalTime.java

@@ -8,7 +8,7 @@ import org.joda.time.LocalTime;
  *
  * @param <R> the root query bean type
  */
-public final class PJodaLocalTime<R> extends PBaseNumber<R,LocalTime> {
+public final class PJodaLocalTime<R> extends PBaseTime<R, LocalTime> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PJson.java

@@ -17,7 +17,7 @@ package io.ebean.typequery;
  *
  * @param <R> the root query bean type
  */
-public final class PJson<R> extends TQPropertyBase<R> {
+public final class PJson<R> extends TQPropertyBase<R, String> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PLocalTime.java

@@ -8,7 +8,7 @@ import java.time.LocalTime;
  *
  * @param <R> the root query bean type
  */
-public final class PLocalTime<R> extends PBaseNumber<R,LocalTime> {
+public final class PLocalTime<R> extends PBaseTime<R, LocalTime> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/POffsetDateTime.java

@@ -7,7 +7,7 @@ import java.time.OffsetDateTime;
  *
  * @param <R> the root query bean type
  */
-public final class POffsetDateTime<R> extends PBaseNumber<R,OffsetDateTime> {
+public final class POffsetDateTime<R> extends PBaseDate<R,OffsetDateTime> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/POffsetTime.java

@@ -7,7 +7,7 @@ import java.time.OffsetTime;
  *
  * @param <R> the root query bean type
  */
-public final class POffsetTime<R> extends PBaseNumber<R,OffsetTime> {
+public final class POffsetTime<R> extends PBaseTime<R, OffsetTime> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PScalar.java

@@ -1,13 +1,12 @@
 package io.ebean.typequery;
 
 /**
- * Property for classes that are serialized/deserialized by
- * ScalarType/AttributeConverter.
+ * Property for classes that are serialized/deserialized by ScalarType/AttributeConverter.
  *
  * @param <R> the root query bean type
  * @param <D> the scalar type
  */
-public final class PScalar<R, D> extends PBaseValueEqual<R, D> {
+public final class PScalar<R, D> extends PBaseValueEqual<R, D, Object> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PScalarComparable.java

@@ -8,7 +8,7 @@ package io.ebean.typequery;
  * @param <R> the root query bean type
  * @param <D> the scalar type
  */
-public final class PScalarComparable<R, D extends Comparable<D>> extends PBaseCompareable<R, D> {
+public final class PScalarComparable<R, D extends Comparable<D>> extends PBaseCompareable<R, D, Object> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PString.java

@@ -5,7 +5,7 @@ package io.ebean.typequery;
  *
  * @param <R> the root query bean type
  */
-public final class PString<R> extends PBaseCompareable<R, String> {
+public final class PString<R> extends PBaseCompareable<R, String, String> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PTime.java

@@ -8,7 +8,7 @@ import java.sql.Time;
  *
  * @param <R> the root query bean type
  */
-public final class PTime<R> extends PBaseNumber<R,Time> {
+public final class PTime<R> extends PBaseTime<R,Time> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PTimeZone.java

@@ -7,7 +7,7 @@ import java.util.TimeZone;
  *
  * @param <R> the root query bean type
  */
-public final class PTimeZone<R> extends PBaseValueEqual<R,TimeZone> {
+public final class PTimeZone<R> extends PBaseString<R, TimeZone> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PUuid.java

@@ -7,7 +7,7 @@ import java.util.UUID;
  *
  * @param <R> the root query bean type
  */
-public final class PUuid<R> extends PBaseValueEqual<R,UUID> {
+public final class PUuid<R> extends PBaseValueEqual<R, UUID, Object> {
 
   /**
    * Construct with a property name and root instance.
@@ -16,7 +16,7 @@ public final class PUuid<R> extends PBaseValueEqual<R,UUID> {
    * @param root the root query bean instance
    */
   public PUuid(String name, R root) {
-    super(name , root);
+    super(name, root);
   }
 
   /**

ebean-querybean/src/main/java/io/ebean/typequery/PZoneId.java

@@ -7,7 +7,7 @@ import java.time.ZoneId;
  *
  * @param <R> the root query bean type
  */
-public final class PZoneId<R> extends PBaseValueEqual<R,ZoneId> {
+public final class PZoneId<R> extends PBaseString<R, ZoneId> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PZoneOffset.java

@@ -7,7 +7,7 @@ import java.time.ZoneOffset;
  *
  * @param <R> the root query bean type
  */
-public final class PZoneOffset<R> extends PBaseValueEqual<R,ZoneOffset> {
+public final class PZoneOffset<R> extends PBaseString<R, ZoneOffset> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/PZonedDateTime.java

@@ -7,7 +7,7 @@ import java.time.ZonedDateTime;
  *
  * @param <R> the root query bean type
  */
-public final class PZonedDateTime<R> extends PBaseCompareable<R, ZonedDateTime> {
+public final class PZonedDateTime<R> extends PBaseDate<R, ZonedDateTime> {
 
   /**
    * Construct with a property name and root instance.
@@ -26,25 +26,4 @@ public final class PZonedDateTime<R> extends PBaseCompareable<R, ZonedDateTime>
     super(name, root, prefix);
   }
 
-  /**
-   * Same as greater than.
-   *
-   * @param value the equal to bind value
-   * @return the root query bean instance
-   */
-  public R after(ZonedDateTime value) {
-    expr().gt(_name, value);
-    return _root;
-  }
-
-  /**
-   * Same as less than.
-   *
-   * @param value the equal to bind value
-   * @return the root query bean instance
-   */
-  public R before(ZonedDateTime value) {
-    expr().lt(_name, value);
-    return _root;
-  }
 }

ebean-querybean/src/main/java/io/ebean/typequery/TQAssocBean.java

@@ -17,7 +17,7 @@ import java.util.Set;
  * @param <R> the specific root query bean type (e.g. QCustomer)
  */
 @SuppressWarnings("rawtypes")
-public abstract class TQAssocBean<T, R> extends TQProperty<R> {
+public abstract class TQAssocBean<T, R> extends TQProperty<R, Object> {
 
   private static final FetchConfig FETCH_DEFAULT = FetchConfig.ofDefault();
   private static final FetchConfig FETCH_QUERY = FetchConfig.ofQuery();
@@ -111,7 +111,7 @@ public abstract class TQAssocBean<T, R> extends TQProperty<R> {
    * Eagerly fetch this association fetching some of the properties.
    */
   @SafeVarargs
-  protected final R fetchProperties(TQProperty<?>... props) {
+  protected final R fetchProperties(TQProperty<?, ?>... props) {
     return fetchWithProperties(FETCH_DEFAULT, props);
   }
 
@@ -119,7 +119,7 @@ public abstract class TQAssocBean<T, R> extends TQProperty<R> {
    * Eagerly fetch query this association fetching some of the properties.
    */
   @SafeVarargs
-  protected final R fetchQueryProperties(TQProperty<?>... props) {
+  protected final R fetchQueryProperties(TQProperty<?, ?>... props) {
     return fetchWithProperties(FETCH_QUERY, props);
   }
 
@@ -127,7 +127,7 @@ public abstract class TQAssocBean<T, R> extends TQProperty<R> {
    * Eagerly fetch this association using L2 bean cache.
    */
   @SafeVarargs
-  protected final R fetchCacheProperties(TQProperty<?>... props) {
+  protected final R fetchCacheProperties(TQProperty<?, ?>... props) {
     return fetchWithProperties(FETCH_CACHE, props);
   }
 
@@ -135,12 +135,12 @@ public abstract class TQAssocBean<T, R> extends TQProperty<R> {
    * Eagerly fetch query this association fetching some of the properties.
    */
   @SafeVarargs
-  protected final R fetchLazyProperties(TQProperty<?>... props) {
+  protected final R fetchLazyProperties(TQProperty<?, ?>... props) {
     return fetchWithProperties(FETCH_LAZY, props);
   }
 
   @SafeVarargs
-  private R fetchWithProperties(FetchConfig config, TQProperty<?>... props) {
+  private R fetchWithProperties(FetchConfig config, TQProperty<?, ?>... props) {
     spiQuery().fetchProperties(_name, properties(props), config);
     return _root;
   }
@@ -173,13 +173,13 @@ public abstract class TQAssocBean<T, R> extends TQProperty<R> {
   }
 
   private SpiQueryFetch spiQuery() {
-    return (SpiQueryFetch)((TQRootBean) _root).query();
+    return (SpiQueryFetch) ((TQRootBean) _root).query();
   }
 
   @SafeVarargs
-  private Set<String> properties(TQProperty<?>... props) {
+  private Set<String> properties(TQProperty<?, ?>... props) {
     Set<String> set = new LinkedHashSet<>();
-    for (TQProperty<?> prop : props) {
+    for (TQProperty<?, ?> prop : props) {
       set.add(prop.propertyName());
     }
     return set;

ebean-querybean/src/main/java/io/ebean/typequery/TQProperty.java

@@ -6,12 +6,12 @@ import io.ebean.Query;
 /**
  * A property used in type query.
  *
- * @param <R> The type of the owning root bean
+ * @param <R>  The type of the owning root bean
+ * @param <BT> The base type, one of String, Number, Temporal, Boolean, Object.
  */
-public class TQProperty<R> implements Query.Property {
+public class TQProperty<R, BT> implements Query.Property<BT> {
 
   protected final String _name;
-
   protected final R _root;
 
   /**
@@ -41,7 +41,7 @@ public class TQProperty<R> implements Query.Property {
    * Internal method to return the underlying expression list.
    */
   protected final ExpressionList<?> expr() {
-    return ((TQRootBean<?,?>) _root).peekExprList();
+    return ((TQRootBean<?, ?>) _root).peekExprList();
   }
 
   /**

ebean-querybean/src/main/java/io/ebean/typequery/TQPropertyBase.java

@@ -3,9 +3,10 @@ package io.ebean.typequery;
 /**
  * Base scalar property.
  *
- * @param <R> The type of the owning root bean
+ * @param <R>  The type of the owning root bean
+ * @param <BT> The base type of the property
  */
-public class TQPropertyBase<R> extends TQProperty<R> {
+public abstract class TQPropertyBase<R, BT> extends TQProperty<R, BT> {
 
   /**
    * Construct with a property name and root instance.

ebean-querybean/src/main/java/io/ebean/typequery/TQRootBean.java

@@ -263,14 +263,14 @@ public abstract class TQRootBean<T, R> {
    * @param properties the list of properties to fetch
    */
   @SafeVarargs
-  public final R select(TQProperty<R>... properties) {
+  public final R select(TQProperty<R, ?>... properties) {
     ((SpiQueryFetch) query).selectProperties(properties(properties));
     return root;
   }
 
-  private Set<String> properties(Query.Property[] properties) {
+  private Set<String> properties(Query.Property<?>[] properties) {
     Set<String> props = new LinkedHashSet<>();
-    for (Query.Property property : properties) {
+    for (Query.Property<?> property : properties) {
       props.add(property.toString());
     }
     return props;