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1   /*
2    * $Id: ContentTypeInterceptor.java 666756 2008-06-11 18:11:00Z hermanns $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.struts2.rest;
23  
24  import com.opensymphony.xwork2.ActionInvocation;
25  import com.opensymphony.xwork2.ModelDriven;
26  import com.opensymphony.xwork2.inject.Inject;
27  import com.opensymphony.xwork2.interceptor.Interceptor;
28  import org.apache.struts2.ServletActionContext;
29  import org.apache.struts2.rest.handler.ContentTypeHandler;
30  
31  import javax.servlet.http.HttpServletRequest;
32  import java.io.InputStream;
33  import java.io.InputStreamReader;
34  import java.io.Reader;
35  
36  /***
37   * Uses the content handler to apply the request body to the action
38   */
39  public class ContentTypeInterceptor implements Interceptor {
40  
41      private static final long serialVersionUID = 1L;
42      ContentTypeHandlerManager selector;
43      
44      @Inject
45      public void setContentTypeHandlerSelector(ContentTypeHandlerManager sel) {
46          this.selector = sel;
47      }
48      
49      public void destroy() {}
50  
51      public void init() {}
52  
53      public String intercept(ActionInvocation invocation) throws Exception {
54          HttpServletRequest request = ServletActionContext.getRequest();
55          ContentTypeHandler handler = selector.getHandlerForRequest(request);
56          
57          Object target = invocation.getAction();
58          if (target instanceof ModelDriven) {
59              target = ((ModelDriven)target).getModel();
60          }
61          
62          if (request.getContentLength() > 0) {
63              InputStream is = (InputStream) request.getInputStream();
64              InputStreamReader reader = new InputStreamReader(is);
65              handler.toObject((Reader) reader, target);
66          }
67          return invocation.invoke();
68      }
69  
70  }