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73785268 NR |
1 | package be.nikiroo.gofetch.support; |
2 | ||
3 | import java.io.IOException; | |
4 | import java.io.InputStream; | |
5 | import java.net.URL; | |
6 | import java.net.URLConnection; | |
7 | import java.util.List; | |
8 | import java.util.zip.GZIPInputStream; | |
9 | ||
73785268 NR |
10 | import be.nikiroo.gofetch.data.Story; |
11 | ||
12 | public abstract class BasicSupport { | |
13 | public enum Type { | |
eaaeae39 | 14 | SLASHDOT, PIPEDOT, LWN, |
73785268 NR |
15 | } |
16 | ||
17 | static private String preselector; | |
18 | ||
19 | private Type type; | |
20 | ||
21 | abstract public List<Story> list() throws IOException; | |
22 | ||
5c056aad NR |
23 | /** |
24 | * Fetch the full article content as well as all the comments associated to | |
25 | * this {@link Story}, if any (can be empty, but not NULL). | |
26 | * | |
27 | * @param story | |
28 | * the story to fetch the comments of | |
29 | * | |
30 | * @throws IOException | |
31 | * in case of I/O error | |
32 | */ | |
33 | abstract public void fetch(Story story) throws IOException; | |
73785268 NR |
34 | |
35 | abstract public String getDescription(); | |
2d95a873 | 36 | |
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37 | public String getSelector() { |
38 | return getSelector(type); | |
39 | } | |
40 | ||
41 | public Type getType() { | |
42 | return type; | |
43 | } | |
44 | ||
45 | protected void setType(Type type) { | |
46 | this.type = type; | |
47 | } | |
48 | ||
49 | /** | |
50 | * @param preselector | |
51 | * the preselector to set | |
52 | */ | |
53 | static public void setPreselector(String preselector) { | |
54 | BasicSupport.preselector = preselector; | |
55 | } | |
56 | ||
57 | static public BasicSupport getSupport(Type type) { | |
58 | BasicSupport support = null; | |
59 | ||
60 | if (type != null) { | |
61 | switch (type) { | |
62 | case SLASHDOT: | |
63 | support = new Slashdot(); | |
64 | break; | |
2d95a873 NR |
65 | case PIPEDOT: |
66 | support = new Pipedot(); | |
67 | break; | |
eaaeae39 NR |
68 | case LWN: |
69 | support = new LWN(); | |
70 | break; | |
73785268 NR |
71 | } |
72 | ||
73 | if (support != null) { | |
74 | support.setType(type); | |
75 | } | |
76 | } | |
77 | ||
78 | return support; | |
79 | } | |
80 | ||
81 | static public String getSelector(Type type) { | |
82 | return preselector + "/" + type + "/"; | |
83 | } | |
84 | ||
85 | // TODO: check Downloader.java? | |
86 | static protected InputStream open(URL url) throws IOException { | |
87 | URLConnection conn = url.openConnection(); | |
88 | conn.connect(); | |
89 | InputStream in = conn.getInputStream(); | |
90 | if ("gzip".equals(conn.getContentEncoding())) { | |
91 | in = new GZIPInputStream(in); | |
92 | } | |
93 | ||
94 | return in; | |
95 | } | |
96 | } |