About collection

131-140 of 200Refresh
JPA Doc
5

javax.persistence.criteria.FetchParent

> attribute) Create a fetch join to the specified collection-valued attribute using an inner join. Create a fetch join to the specified collection-valued attribute using an inner join. Parameters: attribute ... ( PluralAttribute attribute, JoinType jt) Create a fetch join to the specified collection-valued
JPA Doc
5

javax.persistence.ManyToMany

within an embeddable class contained within an entity class to specify a relationship to a collection ... . When the target collection is a java.util.Map, the cascade element applies to the map value. Defaults ... that is the target of the association. Optional only if the collection-valued relationship property
JPA Doc
5

javax.persistence.MapKeyColumn

which it is found depends upon the context. If the map key is for an element collection, the map key column is in the collection table for the map value. If the map key is for a ManyToMany entity relationship or ... key is for an element collection, the name of the collection table for the map value. If the map key
JPA Doc
5

MapKeyJoinColumn.table

that contains the foreign key column. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join is for a map key ... that is the value of the map. Default: If the map is for an element collection, the name of the collection
JPA Doc
5

PessimisticLockScope.EXTENDED

for PessimisticLockScope.NORMAL, element collections and relationships owned by the entity that are contained ... collection generally locks only the rows in the join table or collection table for that relationship or collection. This means that phantoms will be possible. Since: JPA 2.0
Issue
4

Best practise loading big data

. Garbage collection does not gain enough free memory. We experimented a bit but so far ... (which prevents garbage collection) to non dirty entity objects. Can you share a heap dump ... . So if we do not reference the entities, GC can collect them. But it looks like there is some
JDO Doc
4

addSubquery(sub, variableDeclaration, candidateCollectionExpression, parameters)

with a PersistenceManager, the candidate collection or extent, result class, and range limits are not ... . If the trimmed value is the empty String, or the parameter is null, then the candidate collection ... of the subquery candidateCollectionExpression - the candidate collection of the subquery as
JDO Doc
4

deletePersistentAll(pcs)

Method javax.jdo.PersistenceManager void deletePersistentAll(   Collection pcs ) Delete a Collection of instances from the data store. Parameters: pcs - a Collection of persistent instances Since: JDO 1.0 See Also: deletePersistent(Object pc)
JPA Doc
4

ElementCollection.targetClass

embeddable class that is the element type of the collection. This element is optional only if the collection field or property is defined using Java generics, and must be specified otherwise. It defaults to the paramterized type of the collection when defined using generics. Default value: void.class Since: JPA 2.0
JDO Doc
4

evictAll(pcs)

Method javax.jdo.PersistenceManager void evictAll(   Collection pcs ) Mark a Collection of instances as no longer needed in the cache. Parameters: pcs - the Collection of instances to evict from the cache. Since: JDO 1.0 See Also: evict(Object pc)