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11

Server User List

path relative to the root data directory. Permission to access a directory always includes
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ORDER BY clause (JPQL / Criteria API)

: CriteriaQuery<Country> q = cb.createQuery(Country.class); Root<Country> c = q.from(Country
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Criteria Query From Elements

(bound by an entity class) are represented by the Root subinterface: Join variables (bound by
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JPA Exceptions

javax.persistence.TransactionRequiredException Exception Class Overview The root
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correlate(parentRoot)

Method javax.persistence.criteria.Subquery Root<Y> correlate( Root<Y> parentRoot ) Create a subquery root correlated to a root of the enclosing query. Parameters: parentRoot - a root of the containing query Returns: subquery root Since: JPA 2.0
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javax.persistence.spi.PersistenceUnitInfo

the root of the persistence unit that have not been explicitly listed are to be included in the set of managed classes. Returns whether classes in the root of the persistence unit that have not ... -unlisted-classes element in the persistence.xml file. Returns: whether classes in the root
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getRoots()

Method javax.persistence.criteria.AbstractQuery Set<Root<?>> getRoots() Return the query roots. These are the roots that have been defined for the CriteriaQuery or Subquery itself, including any subquery roots defined as a result of correlation. Returns empty set if no roots have been defined
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from(entity)

Method javax.persistence.criteria.AbstractQuery Root<X> from( EntityType<X> entity ) Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots. Parameters: entity - metamodel entity representing the entity of type X Returns: query root corresponding to the given entity Since: JPA 2.0
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from(entityClass)

Method javax.persistence.criteria.AbstractQuery Root<X> from( Class<X> entityClass ) Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots. Parameters: entityClass - the entity class Returns: query root corresponding to the given entity Since: JPA 2.0
0

javax.jdo.JDOEntityManager

- the root instance to make transient. useFetchPlan - whether to use the current fetch plan ... and which instances to make transient pcs - the root instances to make transient. Since: JDO 2.1 void ... .jdo.spi.Detachable interface. Parameters: pcs - the root instances to make transient. useFetchPlan

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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