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Index Definition

a value of one of the following persistable types: Primitive types: boolean, byte, short, char, int ... , java.sql.Date, java.sql.Time, java.sql.Timestamp. Any enum type. Reference to an entity object. Arrays and collections that contain values of the above types (including null). Indexes
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JPA Query API

should be used mainly when the query result type is unknown or when a query returns polymorphic ... result type is expected queries should usually use the TypedQuery interface. It is easier to run queries and process the query results in a type safe manner when using the TypedQuery interface
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Running JPA Queries

, but the version of Query returns a result list of a raw type (non generic) instead of a parameterized (generic) type: Query query = em.createQuery("SELECT c FROM Country c"); List results = query.getResultList(); An attempt to cast the above results to a parameterized type (List<Country
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javax.persistence.TypedQuery

the execution of typed queries. Since: JPA 2.0 See Also: Query Parameter Learn how to define and use JPA ... > type) Get the parameter object corresponding to the declared positional parameter with the given position and type. Get the parameter object corresponding to the declared positional parameter
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javax.persistence.criteria.CriteriaQuery

has not been specified, duplicate results must be retained. This method only overrides the return type ... - metamodel entity representing the entity of type X Returns: query root corresponding to the given ... type of the query or subquery. Return the result type of the query or subquery. If a result type
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Privacy Policy

is accessing or using the Service, as applicable. Collecting and Using Your Personal Data Types ... (e.g. IP address), unique device identifiers, browser type, browser version, the time and date ... information automatically, including, but not limited to, the type of mobile device You use
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javax.persistence.EntityManager

. The select list of the query must contain only a single item, which must be assignable to the type ... resultClass - the type of the query result Returns: the new query instance Throws: IllegalArgumentException ... or if the query result is found to not be assignable to the specified type Since: JPA 2.0 Query
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javax.persistence.metamodel.MapAttribute

>>, Bindable<V>, PluralAttribute<X,Map<K,V>,V> Instances of the type MapAttribute represent persistent java.util.Map-valued attributes. Since: JPA 2.0 Class<T> getBindableJavaType() Return the Java type of the represented object. Return the Java type of the represented object. If the bindable type
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javax.jdo.JDOEntityManager

to the type specified by the resultClass argument. Parameters: name - the name of a query defined in metadata resultClass - the type of the query result Returns: the new query instance Throws ... to be invalid or if the query result is found to not be assignable to the specified type Since: JPA 2.0
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[ODB1] Chapter 5 - JDO Connections

Specifies the real type of the constructed PersistenceManagerFactory instance. When using ObjectDB ... . The type of the exception is a JDOException subclass that reflects the specific error that occurred ... transactions. This type of transaction is used in ObjectDB by default, but ObjectDB also supports

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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