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Criteria Query Selection and Results

of Expression, any criteria expression can be used as the SELECT clause content. Multiple selection expressions can be represented by CompoundSelection, which is itself a subinterface of Selection ... around Expression, which adds order direction - either ascending (ASC) or descending (DESC
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Issue with TYPE expression in Criteria API

Issue with TYPE expression in Criteria API
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javax.persistence.criteria.CriteriaQuery

entity Since: JPA 2.0 List<Expression<?>> getGroupList() Return a list of the grouping expressions. Return a list of the grouping expressions. Returns empty list if no grouping expressions ... expressions Since: JPA 2.0 Predicate getGroupRestriction() Return the predicate that corresponds
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javax.persistence.criteria.CriteriaBuilder.SimpleCase

javax.persistence.criteria Interface CriteriaBuilder.SimpleCase<C,R> Superinterfaces: Expression<R>, Selection<R>, TupleElement<R> Interface used to build simple case expressions. Case conditions ... Returns: selection item Since: JPA 2.0 Expression<X> as(Class<X> type) Perform a typecast
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javax.persistence.criteria.CriteriaBuilder.Case

javax.persistence.criteria Interface CriteriaBuilder.Case<R> Superinterfaces: Expression<R>, Selection<R>, TupleElement<R> Interface used to build general case expressions. Case conditions ... : selection item Since: JPA 2.0 Expression<X> as(Class<X> type) Perform a typecast upon the expression
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javax.persistence.criteria.MapJoin

javax.persistence.criteria Interface MapJoin<Z,K,V> Superinterfaces: Expression<V>, FetchParent<Z,V ... : selection item Since: JPA 2.0 Expression<X> as(Class<X> type) Perform a typecast upon the expression, returning a new expression object. Perform a typecast upon the expression, returning a new
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javax.persistence.criteria.ListJoin

javax.persistence.criteria Interface ListJoin<Z,E> Superinterfaces: Expression<E>, FetchParent<Z,E ... : selection item Since: JPA 2.0 Expression<X> as(Class<X> type) Perform a typecast upon the expression, returning a new expression object. Perform a typecast upon the expression, returning a new
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javax.persistence.criteria.CriteriaBuilder.Coalesce

javax.persistence.criteria Interface CriteriaBuilder.Coalesce<T> Superinterfaces: Expression<T>, Selection<T>, TupleElement<T> Interface used to build coalesce expressions. A coalesce expression is equivalent to a case expression that returns null if all its arguments evaluate to null
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javax.persistence.criteria.Path

javax.persistence.criteria Interface Path<X> Superinterfaces: Expression<X>, Selection<X ... " expression. Since: JPA 2.0 Learn how to use JPA criteria API paths in Chapter 4 of the ObjectDB/JPA ... item. Parameters: name - alias Returns: selection item Since: JPA 2.0 Expression<X> as(Class<X
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javax.jdo.Query

, cast expression, etc.) a type name must be the name of the candidate class, the name of a class or ... candidateCollectionExpression - the candidate collection of the subquery as an expression using ... of the expression in the outer query. If the trimmed expression is the empty String

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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