FileUploadWrapper


1   /*
2   * @author                        : Reghu
3   * @Version                       : 1.0
4   *
5   * Development Environment        :  Oracle9i JDeveloper 
6   * Name of the File               :  FileUpload.java
7   * Creation/Modification History  :
8   *
9   * Reghu    21-Jan-2002     Created
10  *
11  */
12  
13  package filters.upload;
14  
15  // Java IO classes
16  import java.io.IOException  ;
17  
18  // Servlet related classes
19  import javax.servlet.http.HttpServletRequestWrapper  ;
20  import javax.servlet.http.HttpServletRequest  ;
21  
22  /**
23   * A wrapper class for the HttpServletRequest to handle multipart/form-data 
24   * requests, the kind of requests that support file uploads. 
25   */
26  public class FileUploadWrapper extends HttpServletRequestWrapper   {
27  
28    // The file upload utility class instance
29    FileUpload mreq = null;
30    
31    /**
32     * Returns the value of a request parameter as a String, or null if 
33     * the parameter does not exist.The method overrides parent method.
34     * @param <b>name</b> The name of the parameter
35     * @return <b>String </b> The value of the paramter
36     */
37    public String   getParameter( String   name ) {
38      return mreq.getParameter( name );
39    }
40    
41    /**
42     * Returns an Enumeration of String objects containing the names of the 
43     * parameters contained in this request. If the  request has no parameters, 
44     * the method returns an empty Enumeration.The method overrides parent method.
45     * @return <b>Enumeration </b>of String objects, each String containing the 
46     * name of a request parameter; or an empty Enumeration if the request has 
47     * no parameters
48     */
49    public java.util.Enumeration   getParameterNames() {
50      return mreq.getParameterNames();
51    }
52    /**
53     * Returns an array of String objects containing all of the values the given 
54     * request parameter has, or null if the parameter does not exist.
55     * The method overrides parent method.
56     * @param <b>name</b> the name of the parameter whose value is requested
57     * @return <b><String[]</b> an array of String objects containing the 
58     * parameter's values
59     */
60    public String  [] getParameterValues( String   name ) {
61      return mreq.getParameterValues( name );
62    }
63    
64    /**
65     * The constructor for the HttpServletRequestWrapper
66     * @param <b>request </b>The original request
67     * @param <b>dir</b> file upload directory path
68     * @throws <b>IOException</b> If there was a failure while instantiating
69     * the FileUpload object
70     */
71    public FileUploadWrapper( HttpServletRequest   req, String   dir )
72                throws IOException   {
73      super( req );
74      mreq = new FileUpload( req, dir );
75    }
76  }
77
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