JAVA JPA Goal Repository

JAVA JPA
//Repository
package com.thekhuc.repository;

import java.util.List;

import com.thekhuc.model.Goal;
import com.thekhuc.model.GoalReport;

public interface GoalRepository {

Goal save(Goal goal);

List<Goal> loadAll();

List<GoalReport> findAllGoalReports();

}

//Interface

package com.thekhuc.repository;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import org.springframework.stereotype.Repository;

import com.thekhuc.model.Goal;
import com.thekhuc.model.GoalReport;

@Repository("goalRepository")
public class GoalRepositoryImpl implements GoalRepository {

@PersistenceContext
private EntityManager em;

@Override
public Goal save(Goal goal) {
if(goal.getId() == null){
em.persist(goal);
em.flush();
}
else{
goal = em.merge(goal);
}
return goal;
}

@Override
public List<Goal> loadAll() {
//Query query=em.createQuery("Select g from Goal g");

TypedQuery<Goal> query = em.createNamedQuery(Goal.FIND_ALL_GOALS, Goal.class);
return query.getResultList();
}

@Override
public List<GoalReport> findAllGoalReports() {
//Query query = em.createQuery("Select new com.thekhuc.model.GoalReport(g.minutes, e.minutes, e.activity) " +
// "from Goal g, Exercise e where g.id = e.goal.id");

TypedQuery<GoalReport> query = em.createNamedQuery(Goal.FIND_GOAL_REPORTS, GoalReport.class);
return query.getResultList();
}

}