###TinySpring is a set of tools for spring-mvc-JPA projects. It began when I wished to write a practical generic DAO class for my spring-mvc project.

###For now TinySpring contains three parts:

• A generic DAO class with helper methods to create queries more easily.

• Some view models to help organize your view objects.

• Some utilities missing from classic Apache Commons or Google Guava libraries (or I just don't know of, in this case please inform me ;] ). (Have been moved to tinyutils project in case of using it for JavaSE project)

Assuming you have an Entity called User and you wish a DAO class to access User's data from database. You can simply create a UserDao class which extends AbstractDao<User> and implements the abastract method getEntityClass() in which returns the entity class we'd like to access:

@Repository
@Transactional
public class UserDao extends AbstractDao<User> {

  	@Override
  	protected Class<User> getEntityClass() {

		return User.class;
	}
}

Now we have our first DAO. It has already some out of box methods inherited from AbstractDao like persist() merge() remove() findById() findAll() totalCount() etc.

If you wish to write customized queries, you can use beginQuery() to begin a method chain to help you make a JPA query more easily. Here's some examples:

If you wish to query from User with username 'bob':

import static org.triiskelion.tinyspring.dao.TinyPredicate.equal;

User result = userDao.beginQuery().select()
                   .where(equal("username", "bob"))
                   .getFirstResult();

If you wish to authenticate user 'bob' with password '123456':

boolean authSucess = userDao.beginQuery().select()
                          .where(equal("username","bob"))
                          .and(equal("password","123456"))
                          .hasResult();
                          
  boolean authSucess = userDao.beginQuery().select()
                          .where(and(equal("username", "bob"), equal("password", "123456")))
                          .hasResult();
                          
    boolean authSucess = userDao.beginQuery().select()
                          .where(equal("username", "bob").and(equal("password", "123456")))
                          .hasResult();

All three syntax are valid.

If your query is very complex or you are JPQL expert and you wish to write your JPQL directly:

List<User> resultList = userDao.begeinQuery()
                               .query("SELECT m FROM User m WHERE m.signInTime BETWEEN :a AND :b")
                               .param("a", new Date("2014-07-01"))
                               .param("b", new Date("2014-07-31"))
                               .getResultList();

More demonstrations are coming.