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JPA Entity Fields

Fields of persistable user defined classes (entity classes, embeddable classes ... fields Persistent fields Inverse (Mapped By) fields Primary key (ID) fields Version field The first three groups (transient

JPA Annotations for Fields

The way a field of a persistable class is managed by JPA can be set by the following annotations: field" select="Basic|Embedded ... annotations (and enum) are designated for enum fields:

JDO Annotations for Fields

The way a field of a persistable class is managed by JDO can be set by the following annotations and enum types: field">

[ODB1] Chapter 4 - JDO Metadata

declaring a persistent class as a subclass of a non persistent class. Of course, in that case the fields of class X are not persistent fields, and when an instance of class C is stored, only persistent fields from classes B and C are stored

FetchPlan.DETACH_UNLOAD_FIELDS

Static Field ... ">javax.jdo.FetchPlanint DETACH_UNLOAD_FIELDS For use with fields that are loaded but not in the current fetch plan should be unloaded prior to detachment

FetchPlan.DETACH_LOAD_FIELDS

Static Field ... ">javax.jdo.FetchPlanint DETACH_LOAD_FIELDS For use with fields that are not loaded but are in the current fetch plan should be loaded prior to detachment

setBooleanField(pc, field, currentValue, newValue)

>  int field,   boolean currentValue,   boolean newValue) Mark the field as modified by the user ... > field - the field number

setCharField(pc, field, currentValue, newValue)

>  int field,   char currentValue,   char newValue) Mark the field as modified by the user ... > field - the field number currentValue

setByteField(pc, field, currentValue, newValue)

>  int field,   byte currentValue,   byte newValue) Mark the field as modified by the user ... > field - the field number currentValue

setFloatField(pc, field, currentValue, newValue)

>  int field,   float currentValue,   float newValue) Mark the field as modified by the user ... > field - the field number