org.apache.struts.upload

Interface MultipartRequestHandler

Known Implementing Classes:
CommonsMultipartRequestHandler, DiskMultipartRequestHandler

public interface MultipartRequestHandler

MultipartRequestHandler provides an standard interface for struts to deal with file uploads from forms with enctypes of "multipart/form-data". Providers must provide a no-argument constructor for initialization.

Field Summary

static String
ATTRIBUTE_MAX_LENGTH_EXCEEDED
This is the ServletRequest attribute that should be set when a multipart request is being read and the maximum length is exceeded.

Method Summary

void
finish()
This method is called on when a successful form post has been made.
Hashtable
getAllElements()
This method returns all elements of a multipart request.
Hashtable
getFileElements()
This method is called on to retrieve all the FormFile input elements of the request.
ActionMapping
getMapping()
Get the ActionMapping instance for this request
ActionServlet
getServlet()
Get the ActionServlet instance
Hashtable
getTextElements()
This method is called on to retrieve all the text input elements of the request.
void
handleRequest(HttpServletRequest request)
After constructed, this is the first method called on by ActionServlet.
void
rollback()
This method is called on when there's some sort of problem and the form post needs to be rolled back.
void
setMapping(ActionMapping mapping)
Convienience method to set a reference to a working ActionMapping instance.
void
setServlet(ActionServlet servlet)
Convienience method to set a reference to a working ActionServlet instance.

Field Details

ATTRIBUTE_MAX_LENGTH_EXCEEDED

public static final String ATTRIBUTE_MAX_LENGTH_EXCEEDED
This is the ServletRequest attribute that should be set when a multipart request is being read and the maximum length is exceeded. The value is a Boolean. If the maximum length isn't exceeded, this attribute shouldn't be put in the ServletRequest. It's the job of the implementation to put this attribute in the request if the maximum length is exceeded; in the handleRequest(HttpServletRequest) method.

Method Details

finish

public void finish()
This method is called on when a successful form post has been made. Some implementations will use this to destroy temporary files or write to a database or something of that nature.

getAllElements

public Hashtable getAllElements()
This method returns all elements of a multipart request.
Returns:
A Hashtable where the keys are input names and values are either Strings or FormFiles

getFileElements

public Hashtable getFileElements()
This method is called on to retrieve all the FormFile input elements of the request.
Returns:
A Hashtable where the keys are the input names of the files and the values are FormFile objects

getMapping

public ActionMapping getMapping()
Get the ActionMapping instance for this request

getServlet

public ActionServlet getServlet()
Get the ActionServlet instance

getTextElements

public Hashtable getTextElements()
This method is called on to retrieve all the text input elements of the request.
Returns:
A Hashtable where the keys and values are the names and values of the request input parameters

handleRequest

public void handleRequest(HttpServletRequest request)
            throws ServletException
After constructed, this is the first method called on by ActionServlet. Use this method for all your data-parsing of the ServletInputStream in the request

rollback

public void rollback()
This method is called on when there's some sort of problem and the form post needs to be rolled back. Providers should remove any FormFiles used to hold information by setting them to null and also physically delete them if the implementation calls for writing directly to disk. NOTE: Currently implemented but not automatically supported, ActionForm implementors must call rollback() manually for rolling back file uploads.

setMapping

public void setMapping(ActionMapping mapping)
Convienience method to set a reference to a working ActionMapping instance.

setServlet

public void setServlet(ActionServlet servlet)
Convienience method to set a reference to a working ActionServlet instance.

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