About relation

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Persistent.dependent

Annotation Element javax.jdo.annotations.Persistent String dependent Whether related object(s) of this member are dependent and so deleted when this object is deleted. Returns: whether the related object(s) of this member are dependent Default value: "" Since: JDO 2.1
JDO Doc
3

Persistent.mappedBy

Annotation Element javax.jdo.annotations.Persistent String mappedBy Name of the related member in the other class where this value is mapped (bidirectional relationship). Returns: the related member in the other class Default value: "" Since: JDO 2.1
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2

Performance problem

(probably related to the number of related objects) First version of code:     EntityManagerFactory emf ... which are in relations to USER class. Our main question after investigating application code is whay does ... . You wrote that there are only 4 EAGER relationships in User. Did you check which of them is related
JDO Doc
2

Constants.ORM_DTD_RESOURCE

Static Field javax.jdo.Constants String ORM_DTD_RESOURCE The name of the resource for the DTD of the standard JDO object-relational mapping metadata file. Since: JDO 2.1
JDO Doc
2

Constants.ORM_XSD_RESOURCE

Static Field javax.jdo.Constants String ORM_XSD_RESOURCE The name of the resource for the XML schema of the standard JDO object-relational mapping metadata file. Since: JDO 2.1
JDO Doc
2

detachCopyAll(pcs)

the current FetchPlan will be traversed. Thus, to detach a graph of objects, relations to other persistent
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2

Exception after update of indices of Entity class

= {"relations.related"}) }) public class Event extends Entity {     @Embedded     private Recurrence recurrence = null;     @ElementCollection     private Collection<Relation> relations = new ... class Relation {     private String relatedId = null;     private Event related = null
JDO Doc
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getObjectId(pc)

might succeed, but there are no guarantees that the parameter and return instances are related in any way
JDO Doc
2

javax.jdo.annotations.Element

javax.jdo.annotations Annotation Element Target: Fields (including property get methods) Annotation for the element of a collection/array relation. Corresponds to the xml element "element". Since: JDO 2.1 String column Name of the column to store the element in. Name of the column to store
JDO Doc
2

javax.jdo.annotations.Join

javax.jdo.annotations Annotation Join Target: Classes and fields (including property get methods) Annotation for the join of a relation. Corresponds to the xml element "join". Since: JDO 2.1 String column Name of the column in the join table. Name of the column in the join table. Returns: the name