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6

javax.persistence.criteria.MapJoin

, an alias cannot be changed or reassigned. Returns the same selection item. Parameters: name - alias Returns ... : may result in a runtime failure. Parameters: type - intended type of the expression Returns: new ... attribute using an inner join. Parameters: attributeName - name of the attribute for the target
5

Numbers in JPQL and Criteria Queries

parameters - when numeric values are assigned as arguments. as path expressions - in navigation ... may be either another numeric expression or a simple Java numeric object: // Create path and parameter ... = cb.parameter(Integer.class); // Addition (+) Expression<Integer> sum1 = cb.sum(path, param
5

WHERE clause (JPQL / Criteria API)

); ParameterExpression<Integer> p = cb.parameter(Integer.class); q.where(cb.gt(c.get("population"), p ... = cb.parameter(Integer.class); ParameterExpression<Integer> a = cb.parameter(Integer.class
5

javax.persistence.criteria.Subquery

, an alias cannot be changed or reassigned. Returns the same selection item. Parameters: name - alias ... . Warning: may result in a runtime failure. Parameters: type - intended type of the expression Returns ... of the enclosing query. Parameters: parentRoot - a root of the containing query Returns: subquery
5

javax.persistence.EntityManager

is a managed entity instance belonging to the current persistence context. Parameters: entity - entity ... ). Parameters: name - the name of a query defined in metadata Returns: the new query instance Throws ... specified by the resultClass argument. Parameters: name - the name of a query defined in metadata
5

javax.persistence.criteria.ParameterExpression

>, Parameter<T>, Selection<T>, TupleElement<T> Type of criteria query parameter expressions. Since: JPA 2.0 ... . Parameters: name - alias Returns: selection item Since: JPA 2.0 Expression<X> as(Class<X> type ... : the runtime type is not changed. Warning: may result in a runtime failure. Parameters: type - intended type
5

javax.persistence.metamodel.EntityType

name. Parameters: name - the name of the represented attribute Returns: attribute with given name ... the Collection-valued attribute of the managed type that corresponds to the specified name. Parameters ... name and Java element type. Parameters: name - the name of the represented attribute elementType
5

javax.persistence.metamodel.MappedSuperclassType

to the specified name. Parameters: name - the name of the represented attribute Returns: attribute ... of the managed type that corresponds to the specified name. Parameters: name - the name ... . Parameters: name - the name of the represented attribute elementType - the element type of the represented
5

javax.persistence.criteria.CriteriaQuery

results must be retained. Parameters: distinct - boolean value specifying whether duplicate results ... of the corresponding AbstractQuery method. Parameters: distinct - boolean value specifying ... roots. Parameters: entityClass - the entity class Returns: query root corresponding to the given entity
5

javax.persistence.metamodel.IdentifiableType

of the managed type that corresponds to the specified name. Parameters: name - the name of the represented ... the Collection-valued attribute of the managed type that corresponds to the specified name. Parameters ... and Java element type. Parameters: name - the name of the represented attribute elementType

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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