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18

keys(map)

Method javax.persistence.criteria.CriteriaBuilder Expression<Set<K>> keys( M map ) Create an expression that returns the keys of a map. Parameters: map - map Returns: set expression Since: JPA 2.0
18

javax.persistence.PrimaryKeyJoinColumn

get methods) Specifies a primary key column that is used as a foreign key to join to another table ... to a primary table; and it may be used in a OneToOne mapping in which the primary key ... to have the same names as the primary key columns of the primary table of the superclass. Example
1

Key.table

Annotation Element javax.jdo.annotations.Key String table Name of the table for the key. Returns: name of the table for the key Default value: "" Since: JDO 2.1
1

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
1

Key.types

Annotation Element javax.jdo.annotations.Key Class[] types Types of the keys. This can be determined if using JDK1.5 generics but is required otherwise. Multiple types can be specified if the implementation supports multiple types. Returns: the types of keys Default value: {} Since: JDO 2.1
1

putUserObject(key, val)

Method javax.jdo.PersistenceManager Object putUserObject( Object key, Object val ) Put the specified key-value pair into the map of user objects. Parameters: key - val - Since: JDO 2.0
1

Key.extensions

Annotation Element javax.jdo.annotations.Key Extension[] extensions Vendor extensions. Returns: the vendor extensions Default value: {} Since: JDO 2.1
1

Key.index

Annotation Element javax.jdo.annotations.Key String index The name of the index to generate. Returns: the name of the index Default value: "" Since: JDO 2.1
1

Key.indexed

Annotation Element javax.jdo.annotations.Key String indexed Whether the value column(s) should be indexed. Returns: whether the value column(s) should be indexed. Default value: "" Since: JDO 2.1
1

Key.unique

Annotation Element javax.jdo.annotations.Key String unique Whether the element column(s) contents should be considered unique Returns: whether the element column(s) contents should be considered unique 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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