About transient
JPA Entity Fields
Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... classified into the following five groups: Transient fields Persistent fields Inverse (Mapped ... Version field The first three groups (transient, persistent and inverse fields) can be used in both entity classes ...
JPA Annotations for Fields
Reference (JavaDoc) of JPA 2 field annotations, including @Basic, @Embedded, @EmbeddedId, @Version, @Transient, @Enumerated, @MapKeyEnumerated, @Temporal and @MapKeyTemporal.... javax.persistence.Version javax.persistence.Transient Additional annotations (and enum) are designated for ...
@MappedSuperclass and @Transient not working as I expected
The problem could be my expectation, since I'm fairly inexperienced with JPA. But here is the problem: The base class of my entity hierarchy is annotated as @MappedSuperclass, and one of its fields is annotated @Transient. I expected that when I persist a subclass, no table would be created for the superclass, and the transient field would not appear in any table. The actual result is that there is a table for the superclass. When I try to examine it in ObjectDB Explorer, it throws a NPE. ... as @MappedSuperclass, and one of its fields is annotated @Transient. I expected that when I persist a subclass, no table would be created for the superclass, and the transient field would not appear in any table. The actual result is ...
@Transient
Hello, I have a persistent class which looks something like this: @Entity public class Test { private String string; private Date date; @Transient private boolean test; // getters/setters } When I persist the class the transient 'boolean test' is stored in the database, maybe I am doing it wrong but I expect... ; private Date date ; @ Transient private boolean test ; // ... } When I persist the class the transient 'boolean test' is stored in the database, maybe I am doing it wrong ... is not stored in the database because it's a (annotated) transient field? Regards, Will ...
javax.persistence.Transient
Specifies that the property or field is not persistent.(Annotation of JPA)
javax.jdo.PersistenceManager
PersistenceManager is the primary interface for JDO-aware application components.(Interface of JDO)
[ODB1] Chapter 3 - Persistent Classes
Explains what a persistence capable class is and which types are supported by JDO.... persistent classes that live only in memory) are called transient objects or transient instances . The JDO specification refers to persistent classes as ...
javax.jdo.spi.PersistenceCapable
A class that can be managed by a binary-compatible JDO implementation must implement this interface.(Interface of JDO)
[ODB1] Chapter 6 - Persistent Objects
Shows how to store, retrieve, update and delete database objects. ... object, i.e. represents some database content, or a transient object, i.e. not related to any database. Storing Objects ... constructed by the new operator, it always starts as a transient object, regardless of its type. Instances of persistent classes can ...
