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