org.springframework.web.struts

Class SpringBindingActionForm

java.lang.Object

ActionForm

org.springframework.web.struts.SpringBindingActionForm

Deprecated.

as of Spring 3.0

@Deprecated
public class SpringBindingActionForm
extends ActionForm

A thin Struts ActionForm adapter that delegates to Spring's more complete and advanced data binder and Errors object underneath the covers to bind to POJOs and manage rejected values.

Exposes Spring-managed errors to the standard Struts view tags, through exposing a corresponding Struts ActionMessages object as request attribute. Also exposes current field values in a Struts-compliant fashion, including rejected values (which Spring's binding keeps even for non-String fields).

Consequently, Struts views can be written in a completely traditional fashion (with standard html:form, html:errors, etc), seamlessly accessing a Spring-bound POJO form object underneath.

Note this ActionForm is designed explicitly for use in request scope. It expects to receive an expose call from the Action, passing in the Errors object to expose plus the current HttpServletRequest.

Example definition in struts-config.xml:

 <form-beans>
   <form-bean name="actionForm" type="org.springframework.web.struts.SpringBindingActionForm"/>
 </form-beans>

Example code in a custom Struts Action:

 public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception {
   SpringBindingActionForm form = (SpringBindingActionForm) actionForm;
   MyPojoBean bean = ...;
   ServletRequestDataBinder binder = new ServletRequestDataBinder(bean, "myPojo");
   binder.bind(request);
   form.expose(binder.getBindingResult(), request);
   return actionMapping.findForward("success");
 }

This class is compatible with both Struts 1.2.x and Struts 1.1. On Struts 1.2, default messages registered with Spring binding errors are exposed when none of the error codes could be resolved. On Struts 1.1, this is not possible due to a limitation in the Struts message facility; hence, we expose the plain default error code there.

Since:

1.2.2

Author:

Keith Donald, Juergen Hoeller

See Also:

#expose(org.springframework.validation.Errors, javax.servlet.http.HttpServletRequest)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	SpringBindingActionForm.SpringBindingAwarePropertyUtilsBean Deprecated. Special subclass of PropertyUtilsBean that it is aware of SpringBindingActionForm and uses it for retrieving field values.

Field Summary

Fields

Modifier and Type	Field and Description
private static boolean	defaultActionMessageAvailable Deprecated.
private Errors	errors Deprecated.
private java.util.Locale	locale Deprecated.
private static Log	logger Deprecated.
private MessageResources	messageResources Deprecated.

Constructor Summary

Constructors

Constructor and Description
SpringBindingActionForm() Deprecated.

Method Summary

Methods

Modifier and Type	Method and Description
void	expose(Errors errors, HttpServletRequest request) Deprecated. Set the Errors object that this SpringBindingActionForm is supposed to wrap.
private java.lang.String	findEffectiveMessageKey(ObjectError error) Deprecated. Find the most specific message key for the given error.
private ActionMessages	getActionMessages() Deprecated. Return an ActionMessages representation of this SpringBindingActionForm, exposing all errors contained in the underlying Spring Errors object.
private java.lang.Object	getFieldValue(java.lang.String propertyPath) Deprecated. Get the formatted value for the property at the provided path.
private java.lang.Object[]	resolveArguments(java.lang.Object[] arguments) Deprecated.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

logger

private static final Log logger

Deprecated.

defaultActionMessageAvailable

private static boolean defaultActionMessageAvailable

Deprecated.

errors

private Errors errors

Deprecated.

locale

private java.util.Locale locale

Deprecated.

messageResources

private MessageResources messageResources

Deprecated.

Constructor Detail

SpringBindingActionForm

public SpringBindingActionForm()

Deprecated.

Method Detail

expose

public void expose(Errors errors,
          HttpServletRequest request)

Deprecated.

Set the Errors object that this SpringBindingActionForm is supposed to wrap. The contained field values and errors will be exposed to the view, accessible through Struts standard tags.

Parameters:

errors - the Spring Errors object to wrap, usually taken from a DataBinder that has been used for populating a POJO form object

request - the HttpServletRequest to retrieve the attributes from

See Also:

DataBinder.getBindingResult()

getActionMessages

private ActionMessages getActionMessages()

Deprecated.

Return an ActionMessages representation of this SpringBindingActionForm, exposing all errors contained in the underlying Spring Errors object.

See Also:

Errors.getAllErrors()

resolveArguments

private java.lang.Object[] resolveArguments(java.lang.Object[] arguments)

Deprecated.

findEffectiveMessageKey

private java.lang.String findEffectiveMessageKey(ObjectError error)

Deprecated.

Find the most specific message key for the given error.

Parameters:

error - the ObjectError to find a message key for

Returns:

the most specific message key found

getFieldValue

private java.lang.Object getFieldValue(java.lang.String propertyPath)
                                throws java.lang.NoSuchMethodException

Deprecated.

Get the formatted value for the property at the provided path. The formatted value is a string value for display, converted via a registered property editor.

Parameters:

propertyPath - the property path

Returns:

the formatted property value

Throws:

java.lang.NoSuchMethodException - if called during Struts binding (without Spring Errors object being exposed), to indicate no available property to Struts