[jOOQ/jOOQ#17566] Add DataType.getFromType(): Class<?> and

DataType.getToType(): Class<T>

jOOQ/src/main/java/org/jooq/DataType.java

@@ -148,10 +148,24 @@ public interface DataType<T> extends Named {
 
     /**
      * Retrieve the Java type associated with this data type.
+     * <p>
+     * This is the same as {@link #getUserType()}.
      */
     @NotNull
     Class<T> getType();
 
+    /**
+     * The {@link Converter#fromType()} (or database type) in case this {@link DataType} has a converter.
+     */
+    @NotNull
+    Class<?> getFromType();
+
+    /**
+     * The {@link Converter#toType()} (or user type) in case this {@link DataType} has a converter.
+     */
+    @NotNull
+    Class<T> getToType();
+
     /**
      * Get the defining DOMAIN type or <code>NULL</code> if there is no such
      * type.

jOOQ/src/main/java/org/jooq/impl/AbstractDataType.java

@@ -631,6 +631,16 @@ implements
         return (@NotNull ContextConverter<?, T>) ContextConverter.scoped(getBinding().converter());
     }
 
+    @Override
+    public final Class<?> getFromType() {
+        return getConverter().fromType();
+    }
+
+    @Override
+    public final Class<T> getToType() {
+        return getConverter().toType();
+    }
+
     @Override
     public /* non-final */ String getTypeName() {
         return getTypeName0(CONFIG_UNQUOTED.get());