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//$Id: GenerationType.java 11282 2007-03-14 22:05:59Z epbernard $
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//EJB3 Specification Copyright 2004-2006 Sun Microsystems, Inc.
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package javax.persistence;
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/**
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 * Defines the types of primary key generation.
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 *
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 * @author Emmanuel Bernard
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 */
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public enum GenerationType {
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        /**
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         * Indicates that the persistence provider must assign primary keys for the entity using an underlying
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         * database table to ensure uniqueness.
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         */
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        TABLE,
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        /**
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         * Indicates that the persistence provider must assign primary keys for the entity using database
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         * sequence column.
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         */
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        SEQUENCE,
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        /**
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         * Indicates that the persistence provider must assign primary keys for the entity using
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         * database identity column.
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         */
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        IDENTITY,
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        /**
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         * Indicates that the persistence provider should pick an appropriate strategy for the
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         * particular database. The AUTO generation strategy may expect a database resource
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         * to exist, or it may attempt to create one. A vendor may provide documentation on how
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         * to create such resources in the event that it does not support schema generation or cannot
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         * create the schema resource at runtime.
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         */
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        AUTO
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};