If you want to map a enum in JPA/Hibernate POJO class, so that only specific values can be saved for underlying database column, it is possible now very easily. The sample POJO File is given below, have an idea. @Enumerated( javax.persistence.EnumType.STRING ) tells what values you want into database from provided enum type, & hibernate will …
Category Archive: Hibernate
Permanent link to this article: http://www.javaplex.com/blog/hibernate-enum-datatype-mapping/
Jan
17
Hibernate persist() vs. save()
In case anybody finds this thread… For persist() The semantics of this method are defined by JSR-220. persist() is well defined. It makes a transient instance persistent. However, it doesn’t guarantee that the identifier value will be assigned to the persistent instance immediately, the assignment might happen at flush time. The spec doesn’t say that, …
Permanent link to this article: http://www.javaplex.com/blog/hibernate-persist-vs-save/
Nov
24
Generic DAO with Hibernate and Spring
If you are using Hibernate with Spring, then you will be dealing with huge set of DAOs. In such case best way to minimize the DAO work with Generic DAO patter, which encapsulate CRUD + basic finder method and then write only very required methods. I’m inspired by the IBM Generic DAO pattern and rewrite …
Permanent link to this article: http://www.javaplex.com/blog/generic-dao-with-hibernate-and-spring/
Nov
20
How to achieve Database Auto ID Generation Portability in Hibernate
Hibernate meant to be Database independent ORM solution, but while migrating to another database vendor some key issues arrives. One of them is Auto ID generation of underlying database. MySQL, Oracle & MS SQL Server all uses different techniques to generate auto ID for primary keys. So, when we start migrating we face lot of …
Permanent link to this article: http://www.javaplex.com/blog/how-to-achieve-database-auto-id-generation-portability-in-hibernate/
Nov
17
MyEclipse Customizing Hibernate Reverse Engineering
Most of the time you want to perform hibernate reverse engineering to generate Pojos from underlying database using hibernate-tools or directly from My Eclipse which also uses hibernate-tools. But some times we want to control the mechanism by which hibernate tools generate pojos, like we want to have prefix or suffix in our class name …
Permanent link to this article: http://www.javaplex.com/blog/myeclipse-customizing-hibernate-reverse-engineering/
Sep
05
Hibernate – How to use database’s reserved keywords in HQL and Pojos?
1. Enclose the column name with square brackets [] will solve your problem. @Column(name = “[ORDER]“, nullable = false) public String getOrder() { return order; } And for Hibernate XML Mapping <property name=”Order” type=”string” > <column name=”[ORDER]” length=”128″ /> </property>
Permanent link to this article: http://www.javaplex.com/blog/hibernate-how-to-use-databases-reserved-keywords-in-hql-and-pojos/
Jul
18
Project Skelton based on Extjs, Strtus, Spring and Hibernate
If you decided to start java web project with UI framework with backed Spring and Hibernate. It also bundled with Extjs which have amazing rich UI components and AJAX support out of the box. Some guys, created a skelton project based on above specs and open sourced it on google code repositry with name “MICRITE”. …
Permanent link to this article: http://www.javaplex.com/blog/project-skelton-based-on-extjs-strtus-spring-and-hibernate/
Jun
02
Server side Pagination using JSF Data table and Hibernate
Following is the working example of Dynamic or server side pagination. Your DataModel class JSF Component Util to find datatable at runtime Your Controller Method Your JSF Page
Permanent link to this article: http://www.javaplex.com/blog/server-side-pagination-using-jsf-data-table-and-hibernate/