Use hibernate better

Been playing around with hibernate. An HQL delete query is not the way
to do things; it's better to manipulate the objects and let Hibernate do
everything for you.

README.md

@@ -72,7 +72,7 @@ Until I can get the dropwizard-migrations and Liquibase behavior working correct
     CREATE TABLE week
     (
       id integer NOT NULL,
-      league_id integer NOT NULL,
+      league_id integer REFERENCES league(id) ON DELETE CASCADE NOT NULL,
       start_date date NOT NULL,
       end_date date NOT NULL,
       PRIMARY KEY (id),

src/main/java/com/schmal/dao/CategoryDAO.java

@@ -0,0 +1,24 @@
+package com.schmal.dao;
+
+import com.schmal.domain.Category;
+import com.yammer.dropwizard.hibernate.AbstractDAO;
+import java.util.List;
+import org.hibernate.SessionFactory;
+
+public class CategoryDAO extends AbstractDAO<Category>
+{
+    public CategoryDAO(SessionFactory factory)
+    {
+        super(factory);
+    }
+
+    public List<Category> save(List<Category> categories)
+    {
+        for (Category category : categories)
+        {
+            persist(category);
+        }
+
+        return categories;
+    }
+}

src/main/java/com/schmal/dao/WeekDAO.java

@@ -8,28 +8,26 @@
 
 public class WeekDAO extends AbstractDAO<Week>
 {
+    private final LeagueDAO leagueDAO;
+
     public WeekDAO(SessionFactory factory)
     {
         super(factory);
+
+        leagueDAO = new LeagueDAO(factory);
     }
 
-    public List<Week> save(List<Week> weeks)
+    public List<Week> save(League league, List<Week> weeks)
     {
-        if (weeks.size() > 0)
-        {
-            deleteWeeks(weeks.get(0).getLeague());
-        }
+        // Delete everything.
+        league.getWeeks().clear();
+        leagueDAO.save(league);
+        currentSession().flush();
 
-        for (Week week : weeks)
-        {
-            persist(week);
-        }
+        // Insert all the new Weeks.
+        league.getWeeks().addAll(weeks);
+        leagueDAO.save(league);
 
-        return weeks;
-    }
-
-    public void deleteWeeks(League league)
-    {
-        namedQuery("deleteByLeagueID").setParameter("league", league).executeUpdate();
+        return league.getWeeks();
     }
 }

src/main/java/com/schmal/domain/Matchup.java

@@ -7,6 +7,7 @@
 import javax.persistence.GeneratedValue;
 import javax.persistence.OneToOne;
 import javax.persistence.Table;
+import lombok.EqualsAndHashCode;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.NonNull;
@@ -16,6 +17,7 @@
 
 @NoArgsConstructor
 @RequiredArgsConstructor
+@EqualsAndHashCode(exclude = {"ID"})
 @Entity
 @Table(name = "matchup")
 public class Matchup

src/main/java/com/schmal/domain/Week.java

@@ -8,11 +8,10 @@
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.GeneratedValue;
-import javax.persistence.NamedQueries;
-import javax.persistence.NamedQuery;
 import javax.persistence.OneToMany;
 import javax.persistence.OneToOne;
 import javax.persistence.Table;
+import lombok.EqualsAndHashCode;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.NonNull;
@@ -22,14 +21,9 @@
 
 @NoArgsConstructor
 @RequiredArgsConstructor
+@EqualsAndHashCode(exclude = {"ID", "matchups"})
 @Entity
 @Table(name = "week")
-@NamedQueries({
-    @NamedQuery(
-        name = "deleteByLeagueID",
-        query = "delete from Week where league = :league"
-    )
-})
 public class Week
 {
     @Id

src/main/java/com/schmal/service/WeekService.java

@@ -1,5 +1,6 @@
 package com.schmal.service;
 
+import com.schmal.dao.LeagueDAO;
 import com.schmal.dao.WeekDAO;
 import com.schmal.domain.League;
 import com.schmal.domain.Matchup;
@@ -27,6 +28,8 @@ public class WeekService
 {
     private final WeekDAO dao;
 
+    private final LeagueDAO leagueDAO;
+
     private final LeagueService leagueService;
 
     private final TeamService teamService;
@@ -38,6 +41,7 @@ public class WeekService
     public WeekService(HibernateBundle hibernateBundle)
     {
         dao = new WeekDAO(hibernateBundle.getSessionFactory());
+        leagueDAO = new LeagueDAO(hibernateBundle.getSessionFactory());
         teamService = new TeamService(hibernateBundle);
         leagueService = new LeagueService(hibernateBundle);
     }
@@ -58,12 +62,7 @@ public List<Week> createWeeks(long leagueID) throws Exception
                 break;
         }
 
-        if (weeks.size() > 0)
-        {
-            dao.save(weeks);
-        }
-
-        return weeks;
+        return dao.save(league, weeks);
     }
 
     private List<Week> createESPNWeeks(