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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.http.nio.protocol;
29  
30  import org.apache.http.HttpRequest;
31  
32  /**
33   * <tt>HttpAsyncRequestHandlerMapper</tt> can be used to resolve an instance
34   * of {@link HttpAsyncRequestHandler} matching a particular {@link HttpRequest}.
35   * Usually the resolved request handler will be used to process the request.
36   *
37   * @since 4.3
38   */
39  public interface HttpAsyncRequestHandlerMapper {
40  
41      /**
42       * Looks up a handler matching the given request.
43       *
44       * @param request the request
45       * @return HTTP request handler or <code>null</code> if no match
46       * is found.
47       */
48      HttpAsyncRequestHandler<?> lookup(HttpRequest request);
49  
50  }