About persistence unit

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JPA Doc
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javax.persistence.TransactionRequiredException

javax.persistence Exception TransactionRequiredException java.lang.Object java.lang ... .persistence.PersistenceException javax.persistence.TransactionRequiredException Implemented Interfaces: Serializable Thrown by the persistence provider when a transaction is required
JPA Doc
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persist(entity)

Method javax.persistence.EntityManager void persist(   Object entity ) Make an instance managed and persistent. Parameters: entity - entity instance Throws: EntityExistsException - if the entity already exists. (If the entity already exists, the EntityExistsException may be thrown when the persist
JPA Doc
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CascadeType.PERSIST

Enum Constant javax.persistence.CascadeType PERSIST Cascade persist operation Since: JPA 1.0
JDO Doc
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Constants.ELEMENT_PERSISTENCE_MANAGER_FACTORY

Static Field javax.jdo.Constants String ELEMENT_PERSISTENCE_MANAGER_FACTORY The name of the persistence manager factory element in the JDO configuration file. Constant value is persistence-manager-factory. Since: JDO 2.1
JPA Doc
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javax.persistence.AccessType

javax.persistence Enum AccessType java.lang.Object java.lang.Enumpersistence.AccessType> javax.persistence.AccessType Implemented Interfaces: Serializable, Comparable Is used with the Access annotation to specify an access type to be applied to an entity class
JPA Doc
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javax.persistence.AttributeOverride

javax.persistence Annotation AttributeOverride Target: Classes and fields (including property ... (Required) The column that is being mapped to the persistent attribute. (Required) The column that is being mapped to the persistent attribute. The mapping type will remain the same as is defined in
JPA Doc
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javax.persistence.criteria.ParameterExpression

javax.persistence.criteria Interface ParameterExpression Superinterfaces: ExpressionPersistence query language queries and native ... - if invoked on a parameter obtained from a Java persistence query language query or native query
JPA Doc
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javax.persistence.criteria.Predicate.BooleanOperator

javax.persistence.criteria Enum Predicate.BooleanOperator java.lang.Object java.lang.Enumpersistence.criteria.Predicate.BooleanOperator> javax.persistence.criteria.Predicate.BooleanOperator Implemented Interfaces: Serializable, Comparable Since: JPA 2.0
JPA Doc
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javax.persistence.DiscriminatorType

javax.persistence Enum DiscriminatorType java.lang.Object java.lang.Enumpersistence.DiscriminatorType> javax.persistence.DiscriminatorType Implemented Interfaces: Serializable, Comparable Defines supported types of the discriminator column. Since: JPA 1.0
JPA Doc
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javax.persistence.Embeddable

javax.persistence Annotation Embeddable Target: Classes Defines a class whose instances are stored ... of the persistent properties or fields of the embedded object is mapped to the database table for the entity. Note that the Transient annotation may be used to designate the non-persistent state of an embeddable