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3

javax.persistence.Version

, Integer, short, Short, long, Long, java.sql.Timestamp. Example: @Version @Column(name
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AssociationOverride.joinColumns

Annotation Element javax.persistence.AssociationOverride JoinColumn[] joinColumns The join column(s) being mapped to the persistent attribute(s). The joinColumns elements must be specified if a foreign key mapping is used in the overriding of the mapping of the relationship. The joinColumns element
3

UniqueConstraint.columnNames

Annotation Element javax.persistence.UniqueConstraint String[] columnNames (Required) An array of the column names that make up the constraint. Since: JPA 1.0
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index()

for which an order column has been defined. Returns: expression denoting the index Since: JPA 2.0
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DiscriminatorValue.value

Annotation Element javax.persistence.DiscriminatorValue String value (Optional) The value that indicates that the row is an entity of the annotated entity type. If the DiscriminatorValue annotation is not specified and a discriminator column is used, a provider-specific function will be used
3

javax.persistence.LockModeType

(increment) to the entity's version column. The persistence implementation is not required to support
3

javax.persistence.Basic

javax.persistence Annotation Basic Target: Fields (including property get methods) The simplest type of mapping to a database column. The Basic annotation can be applied to a persistent property or instance variable of any of the following types: Java primitive types, wrappers of the primitive
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OrderColumn.name

Annotation Element javax.persistence.OrderColumn String name (Optional) The name of the ordering column. Defaults to the concatenation of the name of the referencing property or field; "_"; "ORDER". Default value: "" Since: JPA 2.0
0

Key.serialized

Annotation Element javax.jdo.annotations.Key String serialized Whether the key is to be stored serialized (into a single column of a join table). Returns: whether the key is to be stored serialized Default value: "" Since: JDO 2.1
0

Value.serialized

Annotation Element javax.jdo.annotations.Value String serialized Whether the value is to be stored serialized (into a single column of a join table). Returns: Whether the value is to be stored serialized (into a join table) Default value: "" Since: JDO 2.1

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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