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javax.persistence.criteria Interface CollectionJoin<Z,E> Superinterfaces: Expression<E>, FetchParent<Z,E>, From<Z,E>, Join<Z,E>, Path<E>, PluralJoin<Z,Collection<E>,E>, Selection<E>, TupleElement<E> The CollectionJoin interface is the type of the result of joining to a collection


javax.persistence.criteria Interface Predicate Superinterfaces: Expression<Boolean>, Selection<Boolean>, TupleElement<Boolean> Subinterfaces: In The type of a simple or compound predicate: a conjunction or disjunction of restrictions. A simple predicate is considered to be a conjunction


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 always reference entities. Since: JPA 2.0 Learn how to use JPA criteria API's Root in Chapter 4


javax.persistence.criteria Interface ParameterExpression<T> Superinterfaces: Expression<T>, Parameter<T>, Selection<T>, TupleElement<T> Type of criteria query parameter expressions. Since: JPA 2.0 Selection<X> alias(String name) Assigns an alias to the selection item. Assigns an alias


javax.persistence.criteria Interface MapJoin<Z,K,V> Superinterfaces: Expression<V>, FetchParent<Z,V>, From<Z,V>, Join<Z,V>, Path<V>, PluralJoin<Z,Map<K,V>,V>, Selection<V>, TupleElement<V> The MapJoin interface is the type of the result of joining to a collection over an association or element

ClassCastException in Tuple.get

.get chokes on Join, Root and probably other TupleElements that are not a Path - am I right? hobson ... with any TupleElement, be it Path, Join, Root, or whatever. It would make ObjectDB more conformant ... how all calls to Tuple.get(TupleElement) fail with ClassCastException. Exception in thread "main

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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