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19 package org.eclipse.jetty.websocket.jsr356;
20
21 import java.util.ArrayList;
22 import java.util.List;
23 import java.util.Map;
24 import java.util.concurrent.ConcurrentHashMap;
25 import javax.websocket.MessageHandler;
26
27 import org.eclipse.jetty.util.log.Log;
28 import org.eclipse.jetty.util.log.Logger;
29 import org.eclipse.jetty.websocket.common.util.ReflectUtils;
30 import org.eclipse.jetty.websocket.jsr356.metadata.MessageHandlerMetadata;
31
32
33
34
35 public class MessageHandlerFactory
36 {
37 private static final Logger LOG = Log.getLogger(MessageHandlerFactory.class);
38
39 private Map<Class<? extends MessageHandler>, List<MessageHandlerMetadata>> registered;
40
41 public MessageHandlerFactory()
42 {
43 registered = new ConcurrentHashMap<>();
44 }
45
46 public List<MessageHandlerMetadata> getMetadata(Class<? extends MessageHandler> handler) throws IllegalStateException
47 {
48 if (LOG.isDebugEnabled())
49 {
50 LOG.debug("getMetadata({})",handler);
51 }
52 List<MessageHandlerMetadata> ret = registered.get(handler);
53 if (ret != null)
54 {
55 return ret;
56 }
57
58 return register(handler);
59 }
60
61 public List<MessageHandlerMetadata> register(Class<? extends MessageHandler> handler)
62 {
63 List<MessageHandlerMetadata> metadatas = new ArrayList<>();
64
65 boolean partial = false;
66
67 if (MessageHandler.Partial.class.isAssignableFrom(handler))
68 {
69 if (LOG.isDebugEnabled())
70 {
71 LOG.debug("supports Partial: {}",handler);
72 }
73 partial = true;
74 Class<?> onMessageClass = ReflectUtils.findGenericClassFor(handler,MessageHandler.Partial.class);
75 if (LOG.isDebugEnabled())
76 {
77 LOG.debug("Partial message class: {}",onMessageClass);
78 }
79 metadatas.add(new MessageHandlerMetadata(handler,onMessageClass,partial));
80 }
81
82 if (MessageHandler.Whole.class.isAssignableFrom(handler))
83 {
84 if (LOG.isDebugEnabled())
85 {
86 LOG.debug("supports Whole: {}",handler.getName());
87 }
88 partial = false;
89 Class<?> onMessageClass = ReflectUtils.findGenericClassFor(handler,MessageHandler.Whole.class);
90 if (LOG.isDebugEnabled())
91 {
92 LOG.debug("Whole message class: {}",onMessageClass);
93 }
94 metadatas.add(new MessageHandlerMetadata(handler,onMessageClass,partial));
95 }
96
97 registered.put(handler,metadatas);
98 return metadatas;
99 }
100 }