externalize hibernate queries or sql queries in properties file in spring

Question

I am developing Web Application in Spring and Hibernate in my eclipse. I want to store my Hibernate queries or Sql queries in properties file and later use it in DAO. Please let me know how to do this? I am using generic DAO , is there any way to make generic queries? Later i would like to store other things like pages links,title also in properties file.

So basically three interrelated questions.

Since I could not think of any way to make generic queries So i have overridden findAll() method in concrete class.

I am using

<context:property-placeholder location="classpath:properties/database.properties"/>

to load the properties.But the problem is how to use it to get hql in java code or class files?

DAO

public abstract class AbstractHibernateDAO<T extends Serializable> {

    public Class<T> clazz;//class object reference

    protected SessionFactory mysessionFactory;

public void setClazz(final Class<T> clazzToSet) {
        this.clazz = clazzToSet;
    }

protected Session getCurrentSession() {

        return mysessionFactory.getCurrentSession();
    }

@SuppressWarnings("unchecked")
    public List<T> findAll() {
        return getCurrentSession().createQuery("from " + clazz.getName()).list();
    }

My concerete DAO

@Repository("categDAO")
@Scope(proxyMode = ScopedProxyMode.TARGET_CLASS,value="request")
public class CategoryDAO extends AbstractHibernateDAO<category_pojo>{

    public CategoryDAO() {

        setClazz(category_pojo.class);
    }

    @Override
    public category_pojo findOneByName(String name) {
        return (category_pojo) getCurrentSession().createQuery("from "+clazz.getName()+" where categoryName=:name").setParameter("name",name).uniqueResult();

    }


}

Answer 1

If I understood right, it sounds like regular Spring usage.

You may have a class like:

class userDao {

    String findActiveUsers;
    //... Getters and Setters

    public List<User> findActiveUsers() {
        return getCurrentSession().createQuery(findActiveUsers).list();
    }
}

So, your application context would look like:

<bean id="userDao" class="my.package.UserDao">
    <property name="findActiveUsers" value="FROM User u WHERE u.active=true"/>
</bean>