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. If the database contains multiple Country objects with the name 'Canada' (e.g

The ObjectDB configuration file contains one <objectdb> root element with seven subelements: <objectdb> <general> ... </general> <database> ... </database> <entities> ... </entities>

The <entities> configuration element specifies front end settings that are relevant on the client side and in embedded mode. The default configuration file contains the following <entities> element: <

, The project does not contain a persistence unit, An entity or IdClass class should implement the java.io.Serializable interface).

container annotations:

to be valid the user defined persistable class must contain a persistent field (or property

query based on fields that a user fills at runtime in a form that contains many optional fields

the guestbook page output, which contains a simple form for signing the guestbook, followed by a list

This reference contains the API documentation (similar to JavaDoc) of JDO 2.2. The content is derived from the original JDO documentation with some additions and notes. The most basic JDO types are:

in a try-catch block: try { // Code containing