Musico ~ Ondřej Macoszek ~ tvůrce webů na volné noze

 1: package cz.cvut.x33eja.macosond.business.music;
 2: 
 3: import cz.cvut.x33eja.macosond.persistence.entity.Album;
 4: import cz.cvut.x33eja.macosond.persistence.entity.Song;
 5: import java.util.Collection;
 6: import javax.annotation.security.PermitAll;
 7: import javax.annotation.security.RolesAllowed;
 8: import javax.ejb.Stateless;
 9: import javax.persistence.EntityManager;
10: import javax.persistence.PersistenceContext;
11: 
12: /**
13:  *
14:  * @author Ondrej Macoszek <macosond@fel.cvut.cz>
15:  */
16: @Stateless
17: public class SongBean implements SongLocal
18: {
19:         @PersistenceContext(unitName="Musico-PU")
20:         private EntityManager em;
21: 
22:         @RolesAllowed({"member","admin"})
23:         public void add(Song song)
24:         {
25:                 em.persist(song);
26:         }
27: 
28:         @RolesAllowed({"member","admin"})
29:         public void edit(Song song)
30:         {
31:                 song = em.merge(song);
32:                 em.persist(song);
33:         }
34: 
35:         @RolesAllowed({"member","admin"})
36:         public void delete(Song song)
37:         {
38:                 song = em.merge(song);
39:                 em.remove(song);
40:         }
41: 
42:         @PermitAll
43:         public Song get(Song song)
44:         {
45:                 return em.find(Song.class, song.getSongID());
46:         }
47: 
48:         @PermitAll
49:         public Song get(Integer SongID)
50:         {
51:                 return em.find(Song.class, SongID);
52:         }
53: 
54:         @PermitAll
55:         public Collection<Song> getAll()
56:         {
57:                 return em.createNamedQuery("Song.list").getResultList();
58:         }
59: 
60:         @PermitAll
61:         public Collection<Song> getByAlbum(Album album)
62:         {
63:                 album = em.find(Album.class, album.getAlbumID());
64:                 return album.getSongs();
65:         }
66: }
67: