So I have learned that the transient
keyword in Java means that an entity does not persist, and that the @Transient
annotation in JPA means don't persist a field to the database. But what does it mean when @Transient
is applied to a method rather than a variable?
This is where I found it in our code:
@Transient
public boolean getTabFoo() {
if ((this.viewFoo1 != ACCESS_NONE)
|| (this.viewFoo2 != ACCESS_NONE) || (this.viewFoo3 != ACCESS_NONE)
|| (this.getViewFoo4() != ACCESS_NONE)) {
return true;
}
return false;
}
All field-level JPA annotations can be placed either on fields or on properties, it determines access type of the entity (i.e. how JPA provider will access fields of that entity - directly or using getters/setters).
Default access type is determined by placement of @Id
annotation, and it should be consistent for all fields of the entity (or hiererchy of inherited entities), unless explicitly overriden by @Access
for some fields.
So, @Transient
on getters has the same meaning as @Transient
on fields - if default access type for your entity is property access, you need to annotate all getters that don't correspond to persistent properties with @Transient
.