About field

api-jpa

javax.persistence.Enumerated

Specifies that a persistent property or field should be persisted as a enumerated type.(Annotation of JPA)

 
api-jpa

OneToMany.mappedBy

The field that owns the relationship.(Annotation Element of javax.persistence.OneToMany)

 
api-jpa

javax.persistence.Transient

Specifies that the property or field is not persistent.(Annotation of JPA)

 
api-jpa

javax.persistence.EmbeddedId

Applied to a persistent field or property of an entity class or mapped superclass to denote a composite primary key that is an embeddable class.(Annotation of JPA)

 
api-jdo

makeDirty(pc, fieldName)

Explicitly mark the parameter instance and field dirty.(Static Method of javax.jdo.JDOHelper)

 
manual

JPA Metamodel API

Explains how to use the JPA Metamodel API to retrieve details on the types and attributes of the persistent object model.... Page... interface provides methods for retrieving field and property details. For example: // Get the field (or property) name: String name = attr. getName getName() ...

 
forum_thread

Schema Update: class hierarchy change

Hello, we try to change the class hierarchy of an Entity. You wrote www.objectdb.com/database/forum/899 that ObjectDB support automatic schema evolution for adding and removing fields and for class hierarchy change.   But our small test failed: At first create a DataBase with one Object of MyEntity ... to read the value of field field profileMigration.classhierachychange.Test$NamedEntity.name using ... com.objectdb.o.UserException: Failed to read the value of field field profileMigration.classhierachychange.Test$NamedEntity.name using ...

 
manual

Database Explorer

Explains how to run and use the ObjectDB object database Explorer to view and manage Java/JPA/JDO objects visually.... a single object, every column represents a persistent field, and the content of a cell is the value of a single field in a single database object. This type of viewer is useful for viewing ...

 
manual

[ODB1] Chapter 9 - ObjectDB Explorer

Explains how to view and manipulate database files in the database explorer. ... a single object, every column represents a persistent field, and the content of a cell is the value of a single field in a single database object. This type of viewer is useful for viewing ...

 
manual

Database Explorer

Explains how to run and use the ObjectDB object database Explorer to view and manage Java/JPA/JDO objects visually.... a single object, every column represents a persistent field, and the content of a cell is the value of a single field in a single database object. This type of viewer is useful for viewing ...