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Manual
2

Deleting JPA Entity Objects

method or implicitly as a result of a cascade operation. Explicit Remove In order to delete an object ... is automatically cascaded to the referenced Address instance, which is then automatically removed as ... , such as when setting the address field to null or to another Address object. If orphanRemoval=true
FAQ
2

Is ObjectDB better than competing object databases?

Data Objects (JDO) API than competing object databases. By using a standard API such as JPA ... database by using an ORM JPA provider such as Hibernate, EclipseLink or Open JPA. Another advantage of using a popular API such as JPA is the availability of experienced developers, supporting
Manual
2

Server User List

addresses. For instance, "127.0.0.1" (which represents the local machine), as shown above, restricts ... to 192.18.194.255, as well as from 127.0.0.1. The admin attribute (whose value is "true" or "false ... and if specified for the master ("$default") it is interpreted by every concrete user definition as
Tutorial
2

Step 3: Define a Spring DAO Component

) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right ... > Java Class.... Enter GuestDao as the class name - use exactly that case sensitive class name ... the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em
Tutorial
2

Step 3: Define a Spring DAO Component

) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right ... . The package name should be guest. Enter GuestDao as the class name - use exactly that case sensitive class ... component class and injects an instance of the DAO component class into the controller, as shown in
Tutorial
2

Step 4: Add a Controller Class

New > Java Class... Enter GuestController as the class name - use exactly that case sensitive class ... ModelAndView("guest.jsp", "guestDao", guestDao); } } The GuestController class is defined as ... ("guest.jsp") and passes the GuestDao component to the JSP as a request attribute (whose name
Tutorial
2

Step 4: Add a Controller Class

) and selecting New > Class. The package name should be guest. Enter GuestController as the class name - use ... is defined as a Spring managed web controller using the @Controller annotation. A GuestDao component ... a target JSP ("guest.jsp") and passes the GuestDao component to the JSP as a request attribute (whose name
Manual
2

UPDATE SET Queries in JPA/JPQL

Existing entity objects can be updated, as explained in chapter 2, by: Retrieving the entity ... a separate EntityManager for UPDATE queries. As with any operation that modifies the database, UPDATE ... Country c SET c.population = c.population * 11 / 10 UPDATE Country AS c SET c.population = c.population
FAQ
2

What are the main benefits of using ObjectDB?

. Less (and more simple) code to write, debug and test, as well as a much easier learning curve leads ... fields can be stored by ObjectDB simply as part of the containing object. Relational databases lack ... multiple values (even for a simple data structure such as a collection of strings). In addition
JPA Doc
2

JPA Queries

concatenating JPQL strings into a valid complete JPQL query. JPA 2 introduced the JPA Criteria Query API, as ... : As noted above, eventually every criteria query is managed by an ordinary TypedQuery instance ... queries as well as of criteria query elements. It can be obtained either by the EntityManagerFactory's