Package de.alpharogroup.db.entity.deletable

Class ByDeletion<PK extends java.io.Serializable,​T,​U>

  • Type Parameters:
    PK - the generic type of the id
    T - the generic type of time measurement
    U - the generic type of the user or account
    All Implemented Interfaces:
    de.alpharogroup.db.entity.accomplishable.Accomplishable<U>, de.alpharogroup.db.entity.deletable.ByDeletable<T,​U>, de.alpharogroup.db.entity.deletable.Deletable<T>, de.alpharogroup.db.entity.deletable.IdentifiableByDeletable<PK,​T,​U>, de.alpharogroup.db.entity.Identifiable<PK>, java.io.Serializable
    @Entity
public class ByDeletion<PK extends java.io.Serializable,​T,​U>
extends SequenceBaseEntity<PK>
implements de.alpharogroup.db.entity.deletable.IdentifiableByDeletable<PK,​T,​U>
    The entity class ByDeletion acts like an deletion flag that keeps the information for the deletion of another entity that have this entity as an instance variable. This information are the date when it was deleted and from whom it was deleted. So this entity can be attached to another entity for keeping information if it is deleted and when it was deleted.

    In specific situation entities have to be kept for instance of historical purposes. So the intent of this entity is that a parent entity will not really be deleted. The initial value of the parent entity that keeps this entity as an instance variable as a null object that signals that it is not deleted, and when it get a value with the deletion data it signals that it is now deleted and is not visible to selections.

    Note: So this entity will only be created if the parent entity references to this entity and is intended to be deleted. This can be done for instance in a deletion strategy. Note: There is no need of a delete flag in this entity because this entity is the flag. So if the parent entity is not any more 'deleted' the reference of this entity will be set to null back.
    See Also:
    Serialized Form

    • Field Summary

      • Fields inherited from interface de.alpharogroup.db.entity.deletable.ByDeletable

        COLUMN_NAME_DELETED_BY

      • Fields inherited from interface de.alpharogroup.db.entity.deletable.Deletable

        COLUMN_NAME_DELETED

      • Fields inherited from interface de.alpharogroup.db.entity.Identifiable

        COLUMN_NAME_ID

    • Constructor Summary

      Constructors 
      Constructor Description
      ByDeletion()  

    • Method Summary

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

      • Methods inherited from interface de.alpharogroup.db.entity.deletable.ByDeletable

        getDeletedBy, setDeletedBy

      • Methods inherited from interface de.alpharogroup.db.entity.deletable.Deletable

        getDeleted, setDeleted

      • Methods inherited from interface de.alpharogroup.db.entity.Identifiable

        getId, setId

    • Constructor Detail

      • ByDeletion

        public ByDeletion()