HCOLL-263 assume direct off-heap impls only used if fails to generate generic off-heap/on-heap readers/writers

README.md

@@ -188,7 +188,7 @@ this for best performance.
 or value objects that are created through, a directClass interface, for example : 
 ``` java
       ChronicleMap<String, BondVOInterface> chm = ChronicleMapBuilder
-               .of(String.class, DataValueClasses.directClassFor(BondVOInterface.class))
+               .of(String.class, ondVOInterface.class)
                .create();
 
 ```
@@ -470,19 +470,12 @@ Below we show you how you can work directly with the off heap entries.
 
 ``` java
 ChronicleMap<CharSequence, BondVOInterface> map = ChronicleMapBuilder
-        .of(String.class, DataValueClasses.directClassFor(BondVOInterface.class))
+        .of(String.class, BondVOInterface.class)
         .keySize(10)
         .create();
 ```
-
-notice that the the builder is passed a wrapped value type
-
-``` java
-.of(CharSequence.class, DataValueClasses.directClassFor(BondVOInterface.class))
-``` 
-
-this is in order to tell the builder that we are going to work directly with the off heap
-entries.
+by default, builder assume that we are going to work directly with the off heap
+entries (`DataValueClasses.directClassFor(BondVOInterface.class)`).
 
 The value class, in our case `BondVOInterface.class` is an `interface` rather than a `class`,  now
 like before, we can

src/main/java/net/openhft/chronicle/map/SerializationBuilder.java

@@ -29,10 +29,7 @@ import net.openhft.lang.io.serialization.BytesMarshaller;
 import net.openhft.lang.io.serialization.ObjectFactory;
 import net.openhft.lang.io.serialization.ObjectSerializer;
 import net.openhft.lang.io.serialization.impl.*;
-import net.openhft.lang.model.Byteable;
-import net.openhft.lang.model.DataValueGenerator;
-import net.openhft.lang.model.DataValueModel;
-import net.openhft.lang.model.DataValueModels;
+import net.openhft.lang.model.*;
 import net.openhft.lang.threadlocal.Provider;
 import net.openhft.lang.threadlocal.ThreadLocalCopies;
 import org.jetbrains.annotations.NotNull;
@@ -104,10 +101,6 @@ final class SerializationBuilder<E> implements Cloneable, Serializable {
     private void configureByDefault(Class<E> eClass, Role role) {
         instancesAreMutable = instancesAreMutable(eClass);
 
-        ObjectFactory<E> factory = concreteClass(eClass) && marshallerUseFactory(eClass) ?
-                new NewInstanceObjectFactory<E>(eClass) :
-                NullObjectFactory.<E>of();
-
         if (eClass.isInterface()) {
             try {
                 BytesReader<E> reader = DataValueBytesMarshallers.acquireBytesReader(eClass);
@@ -119,10 +112,19 @@ final class SerializationBuilder<E> implements Cloneable, Serializable {
                 sizeMarshaller(constant((long) size));
                 return;
             } catch (Exception e) {
+                try {
+                    eClass = DataValueClasses.directClassFor(eClass);
+                } catch (Exception ex) {
+                    // ignore, fall through
+                }
                 // ignore, fall through
             }
         }
 
+        ObjectFactory<E> factory = concreteClass(eClass) && marshallerUseFactory(eClass) ?
+                new NewInstanceObjectFactory<E>(eClass) :
+                NullObjectFactory.<E>of();
+
         if (concreteClass(eClass) && Byteable.class.isAssignableFrom(eClass)) {
             ByteableMarshaller byteableMarshaller = ByteableMarshaller.of((Class) eClass);
             sizeMarshaller(byteableMarshaller);

src/test/java/net/openhft/chronicle/map/fromdocs/OpenJDKAndHashMapExamplesTest.java

@@ -56,7 +56,7 @@ public class OpenJDKAndHashMapExamplesTest {
         file.deleteOnExit();
 
         ChronicleMap<String, BondVOInterface> chm = ChronicleMapBuilder
-                .of(String.class, DataValueClasses.directClassFor(BondVOInterface.class))
+                .of(String.class, BondVOInterface.class)
                 .keySize(10)
                 .createPersistedTo(file);