6 | JPA Persistable Types class can only be stored in the database as embedded objects, i.e. as part of a containing entity object. A class is declared as embeddable by marking it with the Embeddable annotation: @Embeddable ... country; String zip; } Instances of embeddable classes are always embedded in other entity objects |
6 | javax.persistence.TypedQuery object was set to retrieve. The position of the first result the query object was set to retrieve. Returns 0 if setFirstResult was not applied to the query object. Returns: position of the first ... object, returns the flush mode in effect for the entity manager. Returns: flush mode Since: JPA 2.0 |
5 | What are the main benefits of using ObjectDB?. The ability to store ordinary objects in the database directly can simplify the code significantly ... ObjectDB is especially designed to store and manage graphs of objects efficiently. That can accelerate the execution time of object oriented applications significantly. For instance, collection and map |
5 | ORDER BY clause (JPQL / Criteria API) clause produces objects for examination and the WHERE clause selects which objects to collect as results ... . The following query returns Country objects ordered by currency as the primary sort key and by name as ... and a GROUP BY clause the SELECT clause receives groups rather than individual objects and ORDER BY |
5 | ObjectDB OverviewThe ObjectDB Object Database ObjectDB is a powerful Object-Oriented Database Management ... Features 100% pure Java Object-Oriented Database Management System (ODBMS). No proprietary API - managed ... and Spring. See the ObjectDB Object Database Features for more details. |
5 | Comparison in JPQL and Criteria API have the same type and the same primary key value. For embeddable objects, e1 = e2 if e1 and e2 ... ) can be either a criteria expression or a comparable Java object. The 2 letter methods (gt, ge, lt, le) can only be used for numeric comparison. The other methods can be used with any comparable objects |
5 | What is the Java Persistence API (JPA)?) is that in JPA data is represented by classes and objects rather than by tables and records as in JDBC. Using plain old Java objects (POJO) to represent persistent data can significantly simplify database ... are Object Relational Mapping (ORM) tools. The mapping bridges between the data representation in |
5 | javax.persistence.Query back Since: JPA 1.0 int getFirstResult() The position of the first result the query object was set to retrieve. The position of the first result the query object was set to retrieve. Returns 0 if setFirstResult was not applied to the query object. Returns: position of the first result Since: JPA 2 |
0 | JDO Predefined ID ClassesAn object ID is a combination of a persistence capable class and a primary key. It provides a unique representation of a persistent object. The following classes serve as predefined ID classes for persistence capable classes with a simple single field primary key: Object IDs are used in many |
0 | javax.jdo.spi.PersistenceCapable PersistenceManager, object identity, and version if it has one. In the Reference Implementation, the JDO Enhancer ... SERIALIZABLE, then the field is not declared as TRANSIENT. Since: JDO 1.0 void jdoCopyFields(Object ... fm, Object oid) Copy fields to an outside consumer from the key fields in the ObjectId. Copy fields |
