Abstract Daos hinzugefügt

src/main/java/university/at/jku/ce/dao/AbstractStudyDao.java

+package university.at.jku.ce.dao;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import university.at.jku.ce.model.Study;
+
+public abstract class AbstractStudyDao {
+	 
+	abstract List<Study> getAllStudies();
+	
+	abstract Study getStudy(Long id);
+	
+	abstract Study addStudy(Study study);
+	
+	abstract Study updateStudy(Study study);
+	
+	abstract Study removeStudy(long studyId);
+}

src/main/java/university/at/jku/ce/dao/AbstractSubjectDao.java

+package university.at.jku.ce.dao;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import university.at.jku.ce.model.Subject;
+
+public abstract class AbstractSubjectDao {
+	public abstract List<Subject> getAllSubjects(long studyId);
+	
+	public abstract Subject getSubject(long studyId, long id);
+	
+	public abstract Subject addSubject (long studyId, Subject subject);
+	
+	public abstract Subject updateSubject (long studyId, Subject subject);
+	
+	public abstract Subject removeSubject (long studyId, long id);
+}

src/main/java/university/at/jku/ce/service/SubjectService.java

@@ -4,8 +4,6 @@ import java.util.ArrayList;
 import university.at.jku.ce.Database;
 import java.util.List;
 import java.util.Map;
-
-import university.at.jku.ce.model.Student;
 import university.at.jku.ce.model.Study;
 import university.at.jku.ce.model.Subject;
 
@@ -15,7 +13,7 @@ import university.at.jku.ce.model.Subject;
 public class SubjectService {
 
 	private Map <Long, Study> studies=Database.getStudies();
-
+	//SubjectDao mit zugriff auf tabelle subjects und studyToSubjects
 	
 	public List<Subject> getAllSubjects(long studyId){
 		Map<Long,Subject> subjects=studies.get(studyId).getSubjects();