Generify Dao hierarchy

persistence/src/main/java/fr/gasser/daoexample/dao/Dao.java

@@ -17,7 +17,7 @@ public abstract class Dao<T extends Entity> {
 
     public abstract T find(int id);
 
-    public abstract List<T> findAll(T obj);
+    public abstract List<T> findAll();
 
     public abstract boolean update(T obj);
 

persistence/src/main/java/fr/gasser/daoexample/dao/DaoAbstractFactory.java

@@ -1,5 +1,9 @@
 package fr.gasser.daoexample.dao;
 
+import fr.gasser.daoexample.model.Discipline;
+import fr.gasser.daoexample.model.Student;
+import fr.gasser.daoexample.model.Teacher;
+
 public interface DaoAbstractFactory {
 
     static DaoAbstractFactory createFactory(FactoryType type) {
@@ -18,10 +22,10 @@ public interface DaoAbstractFactory {
         return createFactory(FactoryType.DaoFactory);
     }
 
-    StudentDao createStudentDao();
+    Dao<Student> createStudentDao();
 
-    TeacherDao createTeacherDao();
+    Dao<Teacher> createTeacherDao();
 
-    DisciplineDao createDisciplineDao();
+    Dao<Discipline> createDisciplineDao();
 
 }

persistence/src/main/java/fr/gasser/daoexample/dao/DaoFactory.java

@@ -1,5 +1,8 @@
 package fr.gasser.daoexample.dao;
 
+import fr.gasser.daoexample.model.Discipline;
+import fr.gasser.daoexample.model.Student;
+import fr.gasser.daoexample.model.Teacher;
 import fr.gasser.daoexample.sql.Connection;
 import fr.gasser.daoexample.sql.DummyConnection;
 
@@ -7,17 +10,17 @@ public class DaoFactory implements DaoAbstractFactory {
     private static Connection connection = new DummyConnection();
 
     @Override
-    public StudentDao createStudentDao() {
+    public Dao<Student> createStudentDao() {
         return new StudentDao(DaoFactory.connection);
     }
 
     @Override
-    public TeacherDao createTeacherDao() {
+    public Dao<Teacher> createTeacherDao() {
         return new TeacherDao(DaoFactory.connection);
     }
 
     @Override
-    public DisciplineDao createDisciplineDao() {
+    public Dao<Discipline> createDisciplineDao() {
         return new DisciplineDao(DaoFactory.connection);
     }
 }

persistence/src/main/java/fr/gasser/daoexample/dao/DisciplineDao.java

@@ -31,7 +31,7 @@ public class DisciplineDao extends Dao<Discipline> {
     }
 
     @Override
-    public List<Discipline> findAll(Discipline obj) {
+    public List<Discipline> findAll() {
         return DISCIPLINES;
     }
 

persistence/src/main/java/fr/gasser/daoexample/dao/StudentDao.java

@@ -32,7 +32,7 @@ public class StudentDao extends Dao<Student> {
     }
 
     @Override
-    public List<Student> findAll(Student obj) {
+    public List<Student> findAll() {
         return students;
     }
 

persistence/src/main/java/fr/gasser/daoexample/dao/TeacherDao.java

@@ -31,7 +31,7 @@ public class TeacherDao extends Dao<Teacher> {
     }
 
     @Override
-    public List<Teacher> findAll(Teacher obj) {
+    public List<Teacher> findAll() {
         return teachers;
     }