Hi Hardy,

Here is my attempt to fix the issue: https://github.com/openwide-java/hibernate-search/commit/8ddad809c82b6b21817dcdc5bb3cc262dbe8f855 using the idea of Yoann.

If you're OK with it, I can push a PR.

To illustrate the problem I have with your patch, consider the following pseudo code:

@MappedSuperClass
com.company.collection1.MyAbstractClass
     @CollectionOfElements
     @Field(fieldBridge...)
     private List<String> collection1;

and

@Entity
com.company.collection1.MyEntity
    @CollectionOfElements
    private List<String> myNonIndexedCollection;

Hibernate Search knows that collection1 should be considered an indexed collection and myNonIndexedCollection should not.

Consider the following update operation:

• I update myNonIndexedCollection
• I don't update collection1
  -> Search should decide that it doesn't have to reindex the object.

But when it tries to do so with your patch, it checks if com.company.collection1.MyEntity.myNonIndexedCollection is matching ^(\w+\.)