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JPA EmbeddableId annotation

The EmbeddableId annotation is used to create a composite primary key. It can also be applied to a persistent field or property of an entity class or… Read More
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JPA Embeddable annotation

It is used to define a class whose instances are stored as an intrinsic part of an owning entity and share the identity of the entity. Each… Read More
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JPA TableGenerator annotation

The TableGenerator defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation. A table generator may… Read More
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JPA SequenceGenerator annotation

The SequenceGenerator annotation defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation. A sequence generator… Read More
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JPA GeneratedValue annotation

The @GeneratedValue annotation provides the specification of generation strategies for the primary keys values. Example: @Id @GeneratedValue(strategy=GenerationType.TABLE , generator="student_generator")@Id @GeneratedValue(strategy=GenerationType.TABLE , generator="student_generator") Attributes: 1. Strategy: The strategy… Read More
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JPA id annotation

The @Id annotation is used to specify the primary key of an entity. The field or property to which the Id annotation is applied should be one… Read More
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JPA Entity Annotation

The @Entity annotation is used to specify that the class is an entity. Attributes: Name: The Name attribute is used to specify the entity name. It is… Read More
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JPA Persistence Unit

A persistence unit defines a set of all user defined persistable classes that are managed by EntityManager instances in an application. This set of entity classes represents… Read More
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JPA Architecture Diagram

Entity: A class which have to be stored in the database tables is known as an entity. They should follow some simple rules of Plain Old Java… Read More
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JPA Overview

Specification: a detailed description of the design. What is ORM? ORM refers to the Object-Relational Mapping. It is a programming technique for converting data between incompatible type… Read More
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