traininfo/provider/ProviderFactory.java

package dk.thoerup.traininfo.provider;


public class ProviderFactory {
        private static DepartureProvider departureProvider = null;
        private static StationProvider stationProvider = null;
        private static TimetableProvider timetableProvider = null;
        private static MetroProvider metroProvider = null;
        
        private static final boolean DEBUG = false;
        
        //TODO: this one really doesn't belong here ... but where should it go ?
        public static void purgeOldEntries() {          
                synchronized (ProviderFactory.class) {
                        if (stationProvider != null ) { 
                                stationProvider.purgeOldEntries();
                        }
                        
                        if (departureProvider != null ) { 
                                departureProvider.purgeOldEntries();
                        }
                        
                        if (timetableProvider != null ) { 
                                timetableProvider.purgeOldEntries();
                        }
                        if (metroProvider != null ) {
                                metroProvider.purgeOldEntries();
                        }
                        
                }

        }
        
        public static DepartureProvider getDepartureProvider() {
                if (departureProvider == null) {
                        if (!DEBUG) {
                                departureProvider = new XmlDepartureProvider();
                        } else {
                                departureProvider = new DebugProvider();
                        }
                }
                
                return departureProvider;
        }
        
        public static StationProvider getStationProvider() {
                if (stationProvider == null) {
                        if (!DEBUG) {
                                stationProvider = new XmlStationProvider();
                        } else {
                                stationProvider = new DebugProvider();
                        }
                }
                
                return stationProvider;
        }
        
        public static TimetableProvider getTimetableProvider() {
                if (timetableProvider == null) {
                        if (!DEBUG) {
                                timetableProvider = new XmlTimetableProvider();
                        } else {
                                timetableProvider = new DebugProvider();
                        }
                }
                return timetableProvider;
        }

        public static MetroProvider getMetroProvider() {
                if (metroProvider == null) {
                        if (!DEBUG) {
                                metroProvider = new XmlMetroProvider();
                        } else {
                                metroProvider = new DebugProvider();
                        }
                }
                return metroProvider;
        }
}
1	package dk.thoerup.traininfo.provider;
2
3
4
5
6	public class ProviderFactory {
7	private static DepartureProvider departureProvider = null;
8	private static StationProvider stationProvider = null;
9	private static TimetableProvider timetableProvider = null;
10	private static MetroProvider metroProvider = null;
11
12	private static final boolean DEBUG = false;
13
14	//TODO: this one really doesn't belong here ... but where should it go ?
15	public static void purgeOldEntries() {
16	synchronized (ProviderFactory.class) {
17	if (stationProvider != null ) {
18	stationProvider.purgeOldEntries();
19	}
20
21	if (departureProvider != null ) {
22	departureProvider.purgeOldEntries();
23	}
24
25	if (timetableProvider != null ) {
26	timetableProvider.purgeOldEntries();
27	}
28	if (metroProvider != null ) {
29	metroProvider.purgeOldEntries();
30	}
31
32	}
33
34	}
35
36	public static DepartureProvider getDepartureProvider() {
37	if (departureProvider == null) {
38	if (!DEBUG) {
39	departureProvider = new XmlDepartureProvider();
40	} else {
41	departureProvider = new DebugProvider();
42	}
43	}
44
45	return departureProvider;
46	}
47
48	public static StationProvider getStationProvider() {
49	if (stationProvider == null) {
50	if (!DEBUG) {
51	stationProvider = new XmlStationProvider();
52	} else {
53	stationProvider = new DebugProvider();
54	}
55	}
56
57	return stationProvider;
58	}
59
60	public static TimetableProvider getTimetableProvider() {
61	if (timetableProvider == null) {
62	if (!DEBUG) {
63	timetableProvider = new XmlTimetableProvider();
64	} else {
65	timetableProvider = new DebugProvider();
66	}
67	}
68	return timetableProvider;
69	}
70
71	public static MetroProvider getMetroProvider() {
72	if (metroProvider == null) {
73	if (!DEBUG) {
74	metroProvider = new XmlMetroProvider();
75	} else {
76	metroProvider = new DebugProvider();
77	}
78	}
79	return metroProvider;
80	}
81	}