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TemporalType injection with Calendar using JPA

TemporalType injection with Calendar using JPA
18

JPA Entity Fields

; } If a version field exists, ObjectDB automatically injects the version value into that field. Version fields
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Step 3: Define an EJB Session Bean

class GuestDao { // Injected database connection: @PersistenceContext private EntityManager ... of the EJB class and injects an instance of the EJB class into the servlet (as shown in the next step). Prepares an EntityManager automatically and injects it into the em field (because it is annotated
6

Step 3: Define a Spring DAO Component

.transaction.annotation.Transactional; @Component public class GuestDao { // Injected database ... the instantiation of the DAO component class and injects an instance of the DAO component class into the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em
6

Step 3: Define a Spring DAO Component

.annotation.Transactional; @Component public class GuestDao { // Injected database connection ... component class and injects an instance of the DAO component class into the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em field
6

Step 3: Define an EJB Session Bean

; @Stateless public class GuestDao { // Injected database connection ... : Manages the instantiation of the EJB class and injects an instance of the EJB class into the servlet (as shown in the next step). Prepares an EntityManager automatically and injects it into the em field
5

Step 4: Add a Servlet Class

; // Injected DAO EJB: @EJB GuestDao guestDao; @Override protected void doGet ... session bean, which is instantiated and injected by the application server into the guestDao field
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Step 4: Add a Servlet Class

final long serialVersionUID = 1L; // Injected DAO EJB: @EJB GuestDao guestDao ... on the database are carried on by the GuestDao session bean, which is instantiated and injected by
3

Step 4: Add a Controller Class

is automatically constructed and injected by Spring into the guestDao field (because it is annotated
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Step 6: Set the Spring XML

, controllers and transactions), to inject a JPA EntityManager, to manage transactions and to look

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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