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JPA Metamodel API

"); Additional methods are defined in ManagedType to return attributes of Collection, List, Set a Map ... : CollectionAttribute - represents attributes of Collection types. SetAttribute - represents attributes of Set types
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Updating JPA Entity Objects

classes are in use. It is usually recommended to use collections rather than arrays when using JPA. Collections are more portable to ORM JPA implementations and provide better automatic change tracking
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javax.persistence.metamodel.ManagedType

(String name) Return the Collection-valued attribute of the managed type that corresponds to the specified name. Return the Collection-valued attribute of the managed type that corresponds ... ) Return the Collection-valued attribute of the managed type that corresponds to the specified name
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javax.persistence.metamodel.EntityType

the Collection-valued attribute of the managed type that corresponds to the specified name. Return the Collection-valued attribute of the managed type that corresponds to the specified name. Parameters ... the Collection-valued attribute of the managed type that corresponds to the specified name and Java element
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javax.persistence.metamodel.MappedSuperclassType

Since: JPA 2.0 CollectionAttribute<?,?> getCollection(String name) Return the Collection-valued attribute of the managed type that corresponds to the specified name. Return the Collection-valued attribute ... > getCollection(String name, Class<E> elementType) Return the Collection-valued attribute
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javax.persistence.criteria.Path

Represents a simple or compound attribute path from a bound type or collection, and is a "primitive ... to the referenced attribute Since: JPA 2.0 Expression<C> get( PluralAttribute<X,C,E> collection) Create a path corresponding to the referenced collection-valued attribute. Create a path corresponding
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javax.persistence.metamodel.EmbeddableType

<?,?> getCollection(String name) Return the Collection-valued attribute of the managed type that corresponds to the specified name. Return the Collection-valued attribute of the managed type that corresponds ... > elementType) Return the Collection-valued attribute of the managed type that corresponds
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javax.persistence.metamodel.IdentifiableType

the Collection-valued attribute of the managed type that corresponds to the specified name. Return the Collection-valued attribute of the managed type that corresponds to the specified name. Parameters ... the Collection-valued attribute of the managed type that corresponds to the specified name and Java element type
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javax.persistence.metamodel.CollectionAttribute

,Collection<E>>, Bindable<E>, PluralAttribute<X,Collection<E>,E> Instances of the type CollectionAttribute represent persistent java.util.Collection-valued attributes. Since: JPA 2.0 Class<T ... : bindable type Since: JPA 2.0 CollectionType getCollectionType() Return the collection type. Return
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javax.persistence.criteria.Subquery

collection join object correlated to a collection join object of the enclosing query. Create a subquery collection join object correlated to a collection join object of the enclosing query ... : predicate testing for membership Since: JPA 2.0 Predicate in(Collection<?> values) Create a predicate

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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