1
2
3
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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 protected transient final Log logger = LogFactory.getLog(FeedSplitter.class);
41
42 public static final String FEED_PROPERTY = "feed.object";
43 private Filter entryFilter;
44 private ObjectToFeed objectToFeed = new ObjectToFeed();
45
46 public FeedSplitter()
47 {
48
49 entryFilter = new EntryLastUpdatedFilter(null);
50 }
51
52 @Override
53 protected List<MuleMessage> splitMessage(MuleEvent event) throws MuleException
54 {
55 List<MuleMessage> messages = new ArrayList<MuleMessage>();
56 if(event.getMessage().getInboundProperty("Content-Length", -1) == 0)
57 {
58 logger.info("Feed has no content, ignoring");
59 return messages;
60 }
61
62 try
63 {
64 Object payload = event.getMessage().getPayload();
65
66 Feed feed;
67 if (payload instanceof Feed)
68 {
69 feed = (Feed) payload;
70 }
71 else
72 {
73 feed = (Feed) objectToFeed.transform(event.getMessage().getPayload());
74 }
75
76 Set<Entry> entries = new TreeSet<Entry>(new EntryComparator());
77 entries.addAll(feed.getEntries());
78 for (Entry entry : entries)
79 {
80 MuleMessage m = new DefaultMuleMessage(entry, event.getMuleContext());
81 if (entryFilter != null && !entryFilter.accept(m))
82 {
83 continue;
84 }
85 m.setInvocationProperty(FEED_PROPERTY, feed);
86 messages.add(m);
87 }
88 return messages;
89 }
90 catch (TransformerException e)
91 {
92 throw new MessagingException(e.getI18nMessage(), event, e);
93 }
94 }
95
96 public Filter getEntryFilter()
97 {
98 return entryFilter;
99 }
100
101 public void setEntryFilter(Filter entryFilter)
102 {
103 this.entryFilter = entryFilter;
104 }
105
106 class EntryComparator implements Comparator<Entry>
107 {
108 public int compare(Entry e1, Entry e2)
109 {
110 if(e1==null && e2 !=null)
111 {
112 return -1;
113 }
114 else if(e1!=null && e2 ==null)
115 {
116 return 1;
117 }
118 else if(e1==null && e2 ==null)
119 {
120 return 0;
121 }
122 else if (e1.getPublished() !=null && e1.getPublished().before(e2.getPublished()))
123 {
124 return -1;
125 }
126 else if (e1.equals(e2))
127 {
128 return 0;
129 }
130 else
131 {
132 return 1;
133 }
134 }
135 }
136 }