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1   /*
2    * $Id: ContentTypeInterceptor.java 651946 2008-04-27 13:41:38Z apetrelli $
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 java.io.InputStream;
25  import java.io.InputStreamReader;
26  import java.io.Reader;
27  
28  import javax.servlet.http.HttpServletRequest;
29  
30  import org.apache.struts2.ServletActionContext;
31  import org.apache.struts2.rest.handler.ContentTypeHandler;
32  
33  import com.opensymphony.xwork2.ActionInvocation;
34  import com.opensymphony.xwork2.ModelDriven;
35  import com.opensymphony.xwork2.inject.Inject;
36  import com.opensymphony.xwork2.interceptor.Interceptor;
37  
38  /***
39   * Uses the content handler to apply the request body to the action
40   */
41  public class ContentTypeInterceptor implements Interceptor {
42  
43      private static final long serialVersionUID = 1L;
44      ContentTypeHandlerManager selector;
45      
46      @Inject
47      public void setContentTypeHandlerSelector(ContentTypeHandlerManager sel) {
48          this.selector = sel;
49      }
50      
51      public void destroy() {}
52  
53      public void init() {}
54  
55      public String intercept(ActionInvocation invocation) throws Exception {
56          HttpServletRequest request = ServletActionContext.getRequest();
57          ContentTypeHandler handler = selector.getHandlerForRequest(request);
58          
59          Object target = invocation.getAction();
60          if (target instanceof ModelDriven) {
61              target = ((ModelDriven)target).getModel();
62          }
63          
64          if (request.getContentLength() > 0) {
65              InputStream is = (InputStream) request.getInputStream();
66              InputStreamReader reader = new InputStreamReader(is);
67              handler.toObject((Reader) reader, target);
68          }
69          return invocation.invoke();
70      }
71  
72  }