Support for javax.persistence.ElementCollection

[yashkolte3]

Can we expect the support to javax.persistence.ElementCollection any soon ? For me, I have a use-case to use my existing JPA entities also in android. OrmLite looks very promising to do so, however it is just about this specific annotation right now.
I evaluated also the com.j256.ormlite.dao.ForeignCollection but the difference there is it would create a single table and add a foreign key to it.
Minimal structure of my entities looks like :
``

@javax.persistence.Entity
class SecondActualEntity {
    @javax.persistence.Id
    UUID id;
    String someElement;
    Integer someNumber;
    
    @javax.persistence.ElementCollection
    List<EmbeddableEntity> embeddableEntityList;
}

``

``

@javax.persistence.Entity
class ActualEntity {
   @javax.persistence.Id
    UUID id;
    String someElement;
    Integer someNumber;
    
    @javax.persistence.ElementCollection
    List<EmbeddableEntity> embeddableEntityList;
}

``

``

@javax.persistence.Embeddable
class EmbeddableEntity {
    String key;
    String value;
}

``
Hibernate creates following tables:

actual_entity => some_element, some_number
actual_entity_embeddable_entity_list => key, value, actual_entity_id

second_actual_entity => some_element, some_number
second_actual_entity_embeddable_entity_list => key, value, second_actual_entity_id

[yashkolte3]

In case anyone else is trying to achieve the same, I have implemented this as an extension to com.j256.ormlite.field.types.SerializableType.
Assumption : The elements marked as @ElementCollection are java.io.Serializable (there is however no such hard check)

`import com.j256.ormlite.field.SqlType;
import com.j256.ormlite.field.types.SerializableType;

import java.lang.reflect.Field;

import javax.persistence.ElementCollection;

/**
 * Persistor which can be used for persisting {@link ElementCollection} fields, assuming such fields are {@link java.io.Serializable}.
 */
public class SerializedElementCollectionPersister extends SerializableType {

    private static SerializedElementCollectionPersister singleTon = null;

    private SerializedElementCollectionPersister() {
        super(SqlType.SERIALIZABLE, new Class[]{});
    }

    public static SerializedElementCollectionPersister getInstance() {
        if (singleTon == null) {
            singleTon = new SerializedElementCollectionPersister();
        }
        return singleTon;
    }

    @Override
    public boolean isValidForField(Field field) {
        return field.getAnnotation(ElementCollection.class) != null;
    }
}`

This is then registered as a "custom persister" =>
DataPersisterManager.registerDataPersisters(SerializedElementCollectionPersister.getInstance())