15 | ObjectDB Object Database Features and array elements are indexable (extremely fast JOIN queries). Map keys and values are indexable ... Tutorial. Easy Learning Curve Easier than other JPA solutions - no need to learn and use O/R mapping ... to most developers. Friendly API JPA is very simple, except for mapping, which is irrelevant |
15 | Retrieving JPA Entity Objects through all the non collection and map persistent fields (i.e. through one-to-one and many-to-one relationships ... navigation through non collection and map persistent fields are also retrieved. Theoretically, in some ... .LAZY) private Employee manager; : } The default for non collection and map references |
15 | Database Connection using JPA of the createEntityManagerFactory method takes a map of persistence unit properties as a second parameter: Map<String ... a map of properties (as demonstrated above). To obtain a connection to an empty database (discarding ... another method for instantiation of EntityManager that, like the factory, takes a map of properties as |
13 | JPA Lifecycle Events can only be specified in a mapping XML file because there is no equivalent annotation: <entity-mappings xmlns ... -unit-defaults> </persistence-unit-metadata> </entity-mappings> The mapping file |
13 | Storing JPA Entity Objects element in the XML mapping file: <entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm ... -unit-defaults> </persistence-unit-metadata> </entity-mappings> The mapping file |
12 | javax.persistence.AssociationOverride get methods) Used to override a mapping for an entity relationship. May be applied to an entity that extends a mapped superclass to override a relationship mapping defined by the mapped superclass. If not specified, the association is mapped the same as in the original mapping. When used to override |
12 | Locking in JPA> For an EntityManagerFactory - using the createEntityManagerFacotory method: Map<String,Object ... - using the createEntityManager method: Map<String,Object> properties = new HashMap ... . For example: Map<String,Object> properties = new HashMap(); properties.put("javax.persistence.lock |
12 | ObjectDB - Object Database for Java (JPA/JDO) conversions between graphs of Java objects and flat database table rows. Object Relational Mapping ... is an extremely easy to use pure Java Object Database, which supports JPA with no mapping ... relational databases, JDBC, drivers, tables, records, ORM tools and mapping - start writing more effective |
1 | [ODB1] Chapter 7 - JDOQL Queries its subclasses), otherwise the query execution throws a JDOUserException. Array and Maps ... = (Collection)query.executeWithArray(args); Arguments can also be passed in a map (by names ... age2"); query.setFilter("this.age >= age1 && this.age <= age2"); Map args = new HashMap |
1 | javax.jdo.Constants See Also: PersistenceManagerFactory.supportedOptions() String OPTION_MAPPING_HETEROGENEOUS_INTERFACE_TYPE "javax.jdo.option.mapping.HeterogeneousInterfaceType" "javax.jdo.option.mapping.HeterogeneousInterfaceType" Since: JDO 2.1 See Also: PersistenceManagerFactory.supportedOptions() String OPTION_MAPPING_HETEROGENEOUS_OBJECT_TYPE |
