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4

MapKeyColumn.unique

is a unique key. This is a shortcut for the UniqueConstraint annotation at the table level and is useful for when the unique key constraint corresponds to only a single column. This constraint applies in addition to any constraint entailed by primary key mapping and to constraints specified at the table level. Default value: false Since: JPA 2.0
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ForeignKey.table

Annotation Element javax.jdo.annotations.ForeignKey String table Table for the foreign key. This is needed iff annotating a type where the foreign key is not defined on the primary table for the type. Returns: the table on which the foreign key is defined Default value: "" Since: JDO 2.1
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Column.unique

is a unique key. This is a shortcut for the UniqueConstraint annotation at the table level and is useful for when the unique key constraint corresponds to only a single column. This constraint applies in addition to any constraint entailed by primary key mapping and to constraints specified at the table level. Default value: false Since: JPA 1.0
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jdoNewObjectIdInstance(o)

of the primary key fields of the persistence-capable instance on which the method is called. If the key is the wrong class for the object id class, null is returned. For classes that use single field ... instance of the class used for JDO identity, using the key constructor of the object id class
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newObjectIdInstance(pcClass, obj)

has no relationship with the values of the primary key fields of the persistence-capable instance on which the method is called. If the key is the wrong class for the object id class, null is returned ... a new instance of the class used by the parameter Class for JDO identity, using the key constructor
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SSL Configuration

private key and its corresponding public key (the SSL protocol is based on the RSA algorithm ... signature. This file is generated from the Keystore file by omitting the private key (it still contains the general information and the public key). You can generate these files using the JDK keytool utility
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[ODB1] Chapter 8 - ObjectDB Server

of your server. This file contains general details (such as a company name), an RSA private key and its corresponding public key (the SSL protocol is based on the RSA algorithm). A Trustore file ... is generated from the Keystore file, by omitting the private key (it still contains the general information
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JoinColumn.table

that contains the column. If a table is not specified, the column is assumed to be in the primary table ... key mapping strategy, the name of the table of the source entity or embeddable. If the join is for a unidirectional OneToMany mapping using a foreign key mapping strategy, the name of the table
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MapsId.value

Annotation Element javax.persistence.MapsId String value (Optional) The name of the attribute within the composite key to which the relationship attribute corresponds. If not supplied, the relationship maps the entity’s primary key. Default value: "" Since: JPA 2.0
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javax.persistence.OneToOne

that assumes both the source and target share the same primary key values. // On Employee class ... embedded field or property. Example 1: One-to-one association that maps a foreign key column

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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