Subject is a subject of persistence. It holds information about each entity that needs to be persisted:
Having this collection of subjects we can perform database queries.
Indicates if this subject can be inserted into the database. This means that this subject either is newly persisted, either can be inserted by cascades.
Indicates if this subject can be updated in the database. This means that this subject either was persisted, either can be updated by cascades.
Changes needs to be applied in the database for the given subject.
Database entity. THIS IS NOT RAW ENTITY DATA, its a real entity.
Indicates if database entity was loaded. No matter if it was found or not, it indicates the fact of loading.
List of updated columns
List of updated relations
Gets entity sent to the persistence (e.g. changed entity). If entity is not set then this subject is created only for the entity loaded from the database, or this subject is used for the junction operation (junction operations are relying only on identifier).
Copy of entity but with relational ids fulfilled.
Generated values returned by a database (for example generated id or default values). Used in insert and update operations. Has entity-like structure (not just column database name and values).
Subject identifier. This identifier is not limited to table entity primary columns. This can be entity id or ids as well as some unique entity properties, like name or title. Insert / Update / Remove operation will be executed by a given identifier.
Inserted values with updated values of special and default columns. Has entity-like structure (not just column database name and values).
Entity metadata of the subject entity.
Indicates if this subject MUST be removed from the database. This means that this subject either was removed, either was removed by cascades.
If subject was created by cascades this property will contain subject from where this subject was created.
Relations updated by the change maps.
Checks if this subject must be inserted into the database. Subject can be inserted into the database if it is allowed to be inserted (explicitly persisted or by cascades) and if it does not have database entity set.
Checks if this subject must be updated into the database. Subject can be updated in the database if it is allowed to be updated (explicitly persisted or by cascades) and if it does have differentiated columns or relations.
Creates a value set needs to be inserted / updated in the database. Value set is based on the entity and change maps of the subject. Important note: this method pops data from this subject's change maps.
Recomputes entityWithFulfilledIds and identifier when entity changes.
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