Jump to: navigation, search

Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Transient"

m
m
Line 37: Line 37:
  
 
{{EclipseLink_JPA
 
{{EclipseLink_JPA
|previous=[[EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Enumerated|Temporal]]
+
|previous=[[EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Lob|@Lob]]
|next=    [[EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Column|Column]]
+
|next=    [[EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Column|@Column]]
 
|up=      [[EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings|Basic Mappings]]
 
|up=      [[EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings|Basic Mappings]]
 
|version= 2.1.0}}
 
|version= 2.1.0}}

Revision as of 10:08, 10 February 2011


link="http://wiki.eclipse.org/EclipseLink"
EclipseLink
Website
Download
Community
Mailing ListForumsIRC
Bugzilla
Open
Help Wanted
Bug Day
Contribute
Browse Source

@Transient

By default, EclipseLink persistence provider assumes that all the fields of an entity are persistent.

Use the @Transient annotation to specify a field or property of an entity that is not persistent (for example, a field or property that is used at run time, but that is not part of the entity's state).

EclipseLink persistence provider will not persist (or create database schema) for a property or field annotated with @Transient.

This annotation can be used with @Entity, @MappedSuperclass), and @Embeddable.

Elug javaspec icon.gif

For more information, see Section 8.1 "Entity" in the JPA Specification.

The @Transient annotation does not have attributes.

The Usage of the @Transient Annotation example shows how to use the @Transient annotation to specify Employee field currentSession as not persistent. EclipseLink persistence provider will not persist this field.


Usage of the @Transient Annotation

 @Entity
 public class Employee implements Serializable {
     ...
     @Id
     int id;
 
     @Transient
     Session currentSession;
     ...
 }
Elug javaspec icon.gif

For more information, see Section 9.1.16 "Transient Annotation" in the JPA Specification.


Eclipselink-logo.gif
Version: 2.1.0
Other versions...