Need a code-generation tool for entities' DAO's [closed]

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Closed 8 years ago开发者_高级运维.

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I have lots of entities in a project and I need to make a data-access-object for every one of them. I think those DAO's will be stateless session beans, each having an entity manager injected into it (I'm not sure on this one, but since I'll be using them in the context of JBoss AS, it looks reasonable. Any advice?).

Is there any tool (ideally, a maven plugin) that can scan my entity classes, process their annotations and generate those beans for me? Each bean should expose methods to create or delete entities, as well as each of the named queries of its respective entity class as a separate method. To be more precise, I want something like in this article:

http://community.jboss.org/people/ilya40umov/blog/2011/01/06/genericejb-based-jpa-entitymanager-extension

but with different methods for each named query. I'll be using JPA 2.0, with Hibernate 4.0. Thanks in advance!

Edit: Stupid me, I forgot to mention that I'm not using spring, and the term DAO is just used to illustrate what I want...

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Telosys Tools is designed for this kind of task It generates code from the database model

See https://sites.google.com/site/telosystools/

You can use a part of this tutorial https://sites.google.com/site/telosystutorial/springmvc-jpa-springdatajpa to generate only the JPA part

You can also create your own templates in order to match you own needs (or adapt existing templates)

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you could use generics and reflection to make something like that

public interface IDao<T> {


public <A extends Serializable> T getElementByID(A x);

public Long getRowsCount();

public List<T> getAll();

public List<T> getAll(String order);

public void saveOrUpdateElement(T x);

public void updateElement(T x);

public void saveElement(T x);

public void deleteElement(T x);

public void setClase(Class<T> clase);

public Class<T> getClase();

public void mergeElement(T x);

public T getFirst();

}

the method public void setClase(Class clase); make all de magic so if you need to query to x then you set the class and the implementaton for example of getAll() will be

public List<T> getAll(){
     return session.createQuery("from "+getClase().getSimpleName()).list();

}

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Take a look at Spring-Data-JPA or Spring ROO