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1 package song;
2
3
5
6 import org.ozoneDB.ExternalDatabase;
7
8 import java.util.Collection  ;
9 import java.util.Iterator ;
10
11
18
19 public class SongApp {
20
21
22 public static void main( String [] args ) throws Exception {
23
24 if (args.length == 0) {
25 printUsage();
26 System.exit( 1 );
27 }
28
29 ExternalDatabase db = ExternalDatabase.openDatabase( "ozonedb:remote://localhost:3333" );
31 db.reloadClasses();
32 System.out.println( "Connected ..." );
33
34 SongServices.init(db);
35
36 if (args[0].equals("AddSong" )) {
37 String title = args[1];
38 String author = args[2];
39 String publisher = args[3];
40 String copyright = args[4];
41
42 addSong(title, author, publisher, copyright);
43
44 } else if (args[0].equals("RemoveSong" )){
45 String title = args[1];
46 removeSong(title);
47
48 } else if (args[0].equals("PrintSongByTitle" )){
49 String title = args[1];
50 printSongForTitle(title);
51
52 } else if (args[0].equals("PrintSongByHandle" )){
53 String handle = args[1];
54 printSongForHandle(handle);
55
56 } else if (args[0].equals("PrintAllSongs" )){
57 printAllSongs();
58 } else {
59
60 printUsage();
61 }
62
63 SongServices.term();
64 db.close();
65 }
66
67 private static void printUsage(){
68 System.out.println( "usage: ojvm song.SongApp <action>");
69 System.out.println( "where <action> is:");
70 System.out.println( " AdddSong <title> <author> <publisher> <copyright>");
71 System.out.println( " RemoveSong <title>");
72 System.out.println( " PrintSongByTitle <title>");
73 System.out.println( " PrintSongByHandle <handle>");
74 System.out.println( " PrintAllSongs");
75 }
76
77
78 private static void addSong(String title, String author, String publisher, String copyright) throws Exception {
79 Song song = SongServices.createSong(title);
80 song.setAuthor(author);
81 song.setPublisher(publisher);
82 song.setCopyright(copyright);
83 printSong(song);
84
85 }
86 private static void removeSong(String title){
87 SongServices.deleteSong(title);
88 }
89 private static void printSongForTitle(String title){
90 Song song = SongServices.songForTitle(title);
91 printSong(song);
92 }
93 private static void printSongForHandle(String handle){
94 Song song = SongServices.songForHandle(handle);
95 printSong(song);
96 }
97 private static void printAllSongs(){
98 Collection songs = SongServices.getAllSongs().getAllSongs().values();
99 System.out.println(songs.size() + " songs in collection.");
100
101 Iterator it = songs.iterator();
102 Song song;
103 while (it.hasNext()){
104 song = (Song)it.next();
105 printSong(song);
106 }
107
108 }
109
110 private static void printSong(Song song) {
111 if (song != null) {
112 System.out.println( "song.Song <" +song.handle() + "> title: "
113 + song.getTitle () + " | by: "
114 + song.getAuthor() + " | published by: "
115 + song.getPublisher() + " | copyright: "
116 + song.getCopyright()
117 );
118 } else {
119 System.out.println("printSong: input song is null.");
120 }
121 }
122
123 }
124
125
126 |
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