Java Doc for PortletRequestDataBinder.java in  » J2EE » spring-framework-2.0.6 » org » springframework » web » portlet » bind » Java Source Code / Java DocumentationJava Source Code and Java Documentation

See the DataBinder/WebDataBinder superclasses for customization options, which include specifying allowed/required fields, and registering custom property editors.

Used by Spring Portlet MVC's BaseCommandController. Note that BaseCommandController and its subclasses allow for easy customization of the binder instances that they use through overriding initBinder.

Can also be used for manual data binding in custom web controllers: for example, in a plain Portlet Controller implementation. Simply instantiate a PortletRequestDataBinder for each binding process, and invoke bind with the current PortletRequest as argument:

 MyBean myBean = new MyBean();
 // apply binder to custom target object
 PortletRequestDataBinder binder = new PortletRequestDataBinder(myBean);
 // register custom editors, if desired
 binder.registerCustomEditor(...);
 // trigger actual binding of request parameters
 binder.bind(request);
 // optionally evaluate binding errors
 Errors errors = binder.getErrors();
 ...

This call can create field errors, representing basic binding errors like a required field (code "required"), or type mismatch between value and bean property (code "typeMismatch").

Multipart files are bound via their parameter name, just like normal HTTP parameters: i.e.

This call can create field errors, representing basic binding errors like a required field (code "required"), or type mismatch between value and bean property (code "typeMismatch").

Multipart files are bound via their parameter name, just like normal HTTP parameters: i.e. "uploadedFile" to an "uploadedFile" bean property, invoking a "setUploadedFile" setter method.

The type of the target property for a multipart file can be MultipartFile, byte[], or String. The latter two receive the contents of the uploaded file; all metadata like original file name, content type, etc are lost in those cases.
Parameters:
  request - request with parameters to bind (can be multipart)
See Also:   org.springframework.web.portlet.multipart.MultipartActionRequest
See Also:   org.springframework.web.multipart.MultipartFile
See Also:   PortletRequestDataBinder.bindMultipartFiles
See Also:   PortletRequestDataBinder.bind(org.springframework.beans.PropertyValues)