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C.2.7 Java Persistence Query Language annotations
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These annotations are used in conjunction with JPQL. javax.persistence.NamedQuery Defines a named query. A named query uses JPQL.
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@Target({TYPE}) @Retention(RUNTIME) public @interface NamedQuery { String name(); String query(); QueryHint[] hints() default {}; } @Target({}) @Retention(RUNTIME) public @interface QueryHint { String name(); String value(); }
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javax.persistence.NamedQueries Defines a number of named queries.
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@Target({TYPE}) @Retention(RUNTIME) public @interface NamedQueries { NamedQuery[] value (); }
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javax.persistence.NamedNativeQuery Defines a named query. A named native query uses SQL.
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APPENDIX C
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Annotations reference
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@Target({TYPE}) @Retention(RUNTIME) public @interface NamedNativeQuery { String name(); String query(); Vendor-specific hints QueryHint[] hints() default {}; Class resultClass() default void.class; String resultSetMapping() default ""; }
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javax.persistence.SqlResultSetMapping Specifies the mapping for the result of a SQL query.
@Target({TYPE}) @Retention(RUNTIME) public @interface SqlResultSetMapping { String name(); EntityResult[] entities() default {}; ColumnResult[] columns() default {}; }
Mapping to entities Mapping to scalar value
javax.persistence.SqlResultSetMappings Denotes more than one mapping.
@Target({TYPE}) @Retention(RUNTIME) public @interface SqlResultSetMappings { SqlResultSetMapping[] value(); }
javax.persistence.Version Specifies the version column used for optimistic record locking.
@Target({METHOD, FIELD}) @Retention(RUNTIME) public @interface Version {}
C.2.8 Entity lifecycle annotations The annotations in this section are used for entity lifecycle management.
javax.persistence.EntityListeners Specifies entity listener classes for an entity.
@Target({TYPE}) @Retention(RUNTIME) public @interface EntityListeners { Class[] value(); }
javax.persistence.ExcludeSuperClassListeners Disables any entity listeners defined in the superclass of an entity.
@Target({TYPE}) @Retention(RUNTIME) public @interface ExcludeSuperclassListeners {}
Java Persistence API annotations
javax.persistence.ExcludeDefaultListeners Disables default entity listeners defined in the persistence module.
@Target({TYPE}) @Retention(RUNTIME) public @interface ExcludeDefaultListeners {}
javax.persistence.PrePersist Marks a method in the entity or listener class as a pre-persist callback (executed before an entity is persisted).
@Target({METHOD}) @Retention(RUNTIME) public @interface PrePersist {}
javax.persistence.PostPersist Marks a method in the entity or listener class as a postpersist callback (executed after an entity is persisted).
@Target({METHOD}) @Retention(RUNTIME) public @interface PostPersist {}
javax.persistence.PreUpdate Marks a method in the entity or listener class as a preupdate callback (executed before entity data is updated in the database).
@Target({METHOD}) @Retention(RUNTIME) public @interface PreUpdate {}
javax.persistence.PostUpdate Marks a method in the entity or listener class as a postupdate callback (executed after entity data is updated in the database).
@Target({METHOD}) @Retention(RUNTIME) public @interface PostUpdate {}
javax.persistence.PreRemove Marks a method in the entity or listener class as a preremove callback (executed before an entity is removed from the database).
@Target({METHOD}) @Retention(RUNTIME) public @interface PreRemove {}
javax.persistence.PostRemove Marks a method in the entity or listener class as a postremove callback (executed after an entity is removed from the database).
@Target({METHOD}) @Retention(RUNTIME) public @interface PostRemove {}
APPENDIX C
Annotations reference
javax.persistence.PostLoad Marks a method in the entity or listener class as a postload callback (executed before an entity is loaded from the database).
@Target({METHOD}) @Retention(RUNTIME) public @interface PostLoad {}
C.2.9 JPA dependency injection
The annotations in this section are used for injecting JPA resources. javax.persistence.PersistenceContext Injects an instance of a container-managed entity manager.
@Target({TYPE, METHOD, FIELD}) @Retention(RUNTIME) public @interface PersistenceContext { Name if used at class level String name() default ""; String unitName() default ""; PersistenceContextType type default TRANSACTION; PersistenceProperty[] properties() default {}; Vendor-specific } properties public enum PersistenceContextType { TRANSACTION, EXTENDED }
javax.persistence.PersistenceUnit Injects an instance of an entity manager factory that you can use to create an application-managed entity manager.
@Target({TYPE, METHOD, FIELD}) @Retention(RUNTIME) public @interface PersistenceUnit { Name if used at class level String name() default ""; String unitName() default ""; }
javax.persistence.PersistenceUnits Denotes multiple persistence units. Used at the class level.
@Target(TYPE) @Retention(RUNTIME) public @interface PersistenceUnits { PersistenceUnit[] value(); }
Deployment descriptors reference
APPENDIX D
Deployment descriptors reference
In this appendix we list all the elements of EJB 3 descriptors. The appendix is designed to be a quick reference you can consult when you plan to use a descriptor in your enterprise application. Each descriptor is defined by an XML schema, and we describe the elements of the schema. As we have explained throughout the book, you have a choice of using annotations, XML descriptors, or both, to define these elements. We have mainly used annotations throughout this book, so here we also list what annotation is overridden by the descriptor, when applicable. This appendix has three sections. The first section (D.1) provides a reference to ejb-jar.xml, which is the descriptor for session beans and MDBs. The second section (D.2) provides a reference to persistence.xml, the descriptor that makes a module a persistence module. The third section (D.3) describes the O/R mapping metadata used by JPA. The schemas are referenced at http://java.sun.com/xml/ns/javaee/#2.
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