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20

EntityManager.find(entityClass, primaryKey) is slow when accessing non-existent IDs

<Duration, String> order) { Instant t, t2; out.println("\nWRITE\n"); t = t2 ... "; order.put(d, s); out.println(" " + d + "\t" + s); } public static void iterate(EntityManager em, boolean existing, String mode, TreeMap<Duration, String> order) { Instant
4

select(selection)

order = q.from(Order.class); q.select(order.get("shippingAddress"). get("state")); CriteriaQuery q2 = cb.createQuery(Product.class); q2.select(q2.from(Order.class
4

desc(x)

Method javax.persistence.criteria.CriteriaBuilder Order desc( Expression<?> x ) Create an ordering by the descending value of the expression. Parameters: x - expression used to define the ordering Returns: descending ordering corresponding to the expression Since: JPA 2.0
4

asc(x)

Method javax.persistence.criteria.CriteriaBuilder Order asc( Expression<?> x ) Create an ordering by the ascending value of the expression. Parameters: x - expression used to define the ordering Returns: ascending ordering corresponding to the expression Since: JPA 2.0
3

multiselect(selections)

of the multiselect method, in the specified order, will be instantiated and returned for each row ... will correspond to the arguments of the multiselect method, in the specified order. If the type ... will correspond to the arguments to the multiselect method, in the specified order. Parameters
0

javax.jdo.JDOHelper

the parameter. The order of instances of the returned array exactly matches the order of instances ... returns one identity instance for each element in the parameter. The order of iteration of the returned Collection exactly matches the order of iteration of the parameter Collection. Parameters: pcs
0

javax.jdo.spi.JDOImplHelper

. Get the field flags for a PersistenceCapable class. The order of fields is the same as for field names ... . Get the field names for a PersistenceCapable class. The order of fields is the natural ordering ... . The order of fields is the same as for field names. Parameters: pcClass - the PersistenceCapable class
0

addSubquery(sub, variableDeclaration, candidateCollectionExpression, parameters)

include the candidate class, filter, parameter declarations, variable declarations, imports, ordering ... to parameters in the order in which they are declared in the subquery, or in the order they are found in
0

javax.jdo.identity.ObjectIdentity

- int compareTo(Object o) Determine the ordering of identity objects. Determine the ordering of identity objects. Parameters: o - Other identity Returns: The relative ordering between the objects
0

javax.jdo.identity.IntIdentity

: arg0 - int compareTo(Object o) Determine the ordering of identity objects. Determine the ordering of identity objects. Parameters: o - Other identity Returns: The relative ordering between the objects

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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