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javax.persistence.criteria.Root

javax.persistence.criteria Interface Root<X> Superinterfaces: Expression<X>, FetchParent<X,X>, From<X,X>, Path<X>, Selection<X>, TupleElement<X> A root type in the from clause. Query roots ... API may need to specify the type resulting from the get operation in order to avoid the use of Path
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javax.persistence.criteria.MapJoin

>, From<Z,V>, Join<Z,V>, Path<V>, PluralJoin<Z,Map<K,V>,V>, Selection<V>, TupleElement<V ... resulting from the get operation in order to avoid the use of Path variables. For example: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from
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Database Transaction Replayer

is useful for two different purposes: It enables recovery from a database failure by replaying ... the objectdb.jar file. It can be run from the command line: > java -cp objectdb.jar com.objectdb
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Setting and Tuning of JPA Queries

the cache. Setting Query Hint (Scopes) Query hints can be set in the following scopes (from global ... c FROM Country c",     hints={@QueryHint(name="javax.persistence.query.timeout", value="7000
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Storing JPA Entity Objects

, the entire closure of entity objects that are reachable from that object by navigation through persistent ... and flush enables moving the temporary updates from memory to the database. Note: Flushing updates
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ObjectDB License Agreement [ver. 2.0.4]

steps to protect the Software from any use, reproduction, or distribution except specifically ... of the Software. This agreement will terminate immediately without notice from ObjectDB Software
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Schema Update

new-name attribute is specified, the package name is changed from the original name ... is specified the class name is changed from the original name, which is specified by the required name
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JPA Queries

. "SELECT c FROM Country"). Criteria Query API Building dynamic queries with a structure that is known ... three groups. SELECT and ORDER BY elements (including tuples): FROM clause elements (representing range
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javax.jdo.datastore.DataStoreCache.EmptyDataStoreCache

. Since: JDO 2.0 void evict(Object oid) Evict the parameter instance from the second-level cache. Evict the parameter instance from the second-level cache. Parameters: oid - the object id of the instance ... - Since: JDO 2.0 void evictAll() Evict the parameter instances from the second-level cache. Evict
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javax.jdo.datastore.DataStoreCache

void evict(Object oid) Evict the parameter instance from the second-level cache. Evict the parameter instance from the second-level cache. Parameters: oid - the object id of the instance to evict. Since: JDO 2.0 void evictAll() Evict the parameter instances from the second-level cache. Evict

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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