1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
package org.mule.module.atom.routing; |
8 | |
|
9 | |
import org.mule.DefaultMuleMessage; |
10 | |
import org.mule.api.MessagingException; |
11 | |
import org.mule.api.MuleEvent; |
12 | |
import org.mule.api.MuleException; |
13 | |
import org.mule.api.MuleMessage; |
14 | |
import org.mule.api.routing.filter.Filter; |
15 | |
import org.mule.api.transformer.TransformerException; |
16 | |
import org.mule.module.atom.transformers.ObjectToFeed; |
17 | |
import org.mule.routing.AbstractSplitter; |
18 | |
|
19 | |
import java.util.ArrayList; |
20 | |
import java.util.Comparator; |
21 | |
import java.util.List; |
22 | |
import java.util.Set; |
23 | |
import java.util.TreeSet; |
24 | |
|
25 | |
import org.apache.abdera.model.Entry; |
26 | |
import org.apache.abdera.model.Feed; |
27 | |
import org.apache.commons.logging.Log; |
28 | |
import org.apache.commons.logging.LogFactory; |
29 | |
|
30 | |
|
31 | |
|
32 | |
|
33 | |
|
34 | |
|
35 | |
public class FeedSplitter extends AbstractSplitter |
36 | |
{ |
37 | |
|
38 | |
|
39 | |
|
40 | 0 | protected transient final Log logger = LogFactory.getLog(FeedSplitter.class); |
41 | |
|
42 | |
public static final String FEED_PROPERTY = "feed.object"; |
43 | |
private Filter entryFilter; |
44 | 0 | private ObjectToFeed objectToFeed = new ObjectToFeed(); |
45 | |
|
46 | |
public FeedSplitter() |
47 | 0 | { |
48 | |
|
49 | 0 | entryFilter = new EntryLastUpdatedFilter(null); |
50 | 0 | } |
51 | |
|
52 | |
@Override |
53 | |
protected List<MuleMessage> splitMessage(MuleEvent event) throws MuleException |
54 | |
{ |
55 | 0 | List<MuleMessage> messages = new ArrayList<MuleMessage>(); |
56 | 0 | if(event.getMessage().getInboundProperty("Content-Length", -1) == 0) |
57 | |
{ |
58 | 0 | logger.info("Feed has no content, ignoring"); |
59 | 0 | return messages; |
60 | |
} |
61 | |
|
62 | |
try |
63 | |
{ |
64 | 0 | Object payload = event.getMessage().getPayload(); |
65 | |
|
66 | |
Feed feed; |
67 | 0 | if (payload instanceof Feed) |
68 | |
{ |
69 | 0 | feed = (Feed) payload; |
70 | |
} |
71 | |
else |
72 | |
{ |
73 | 0 | feed = (Feed) objectToFeed.transform(event.getMessage().getPayload()); |
74 | |
} |
75 | |
|
76 | 0 | Set<Entry> entries = new TreeSet<Entry>(new EntryComparator()); |
77 | 0 | entries.addAll(feed.getEntries()); |
78 | 0 | for (Entry entry : entries) |
79 | |
{ |
80 | 0 | MuleMessage m = new DefaultMuleMessage(entry, event.getMuleContext()); |
81 | 0 | if (entryFilter != null && !entryFilter.accept(m)) |
82 | |
{ |
83 | 0 | continue; |
84 | |
} |
85 | 0 | m.setInvocationProperty(FEED_PROPERTY, feed); |
86 | 0 | messages.add(m); |
87 | 0 | } |
88 | 0 | return messages; |
89 | |
} |
90 | 0 | catch (TransformerException e) |
91 | |
{ |
92 | 0 | throw new MessagingException(e.getI18nMessage(), event, e); |
93 | |
} |
94 | |
} |
95 | |
|
96 | |
public Filter getEntryFilter() |
97 | |
{ |
98 | 0 | return entryFilter; |
99 | |
} |
100 | |
|
101 | |
public void setEntryFilter(Filter entryFilter) |
102 | |
{ |
103 | 0 | this.entryFilter = entryFilter; |
104 | 0 | } |
105 | |
|
106 | 0 | class EntryComparator implements Comparator<Entry> |
107 | |
{ |
108 | |
public int compare(Entry e1, Entry e2) |
109 | |
{ |
110 | 0 | if(e1==null && e2 !=null) |
111 | |
{ |
112 | 0 | return -1; |
113 | |
} |
114 | 0 | else if(e1!=null && e2 ==null) |
115 | |
{ |
116 | 0 | return 1; |
117 | |
} |
118 | 0 | else if(e1==null && e2 ==null) |
119 | |
{ |
120 | 0 | return 0; |
121 | |
} |
122 | 0 | else if (e1.getPublished() !=null && e1.getPublished().before(e2.getPublished())) |
123 | |
{ |
124 | 0 | return -1; |
125 | |
} |
126 | 0 | else if (e1.equals(e2)) |
127 | |
{ |
128 | 0 | return 0; |
129 | |
} |
130 | |
else |
131 | |
{ |
132 | 0 | return 1; |
133 | |
} |
134 | |
} |
135 | |
} |
136 | |
} |