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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.web.portlet.mvc 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.springframework.web.portlet.mvc.AbstractController
   org.springframework.web.portlet.mvc.BaseCommandController
      org.springframework.web.portlet.mvc.AbstractFormController

All known Subclasses:   org.springframework.web.portlet.mvc.AbstractWizardFormController,  org.springframework.web.portlet.mvc.SimpleFormController,
AbstractFormController
abstract public class AbstractFormController extends BaseCommandController (Code)

Form controller that auto-populates a form bean from the request. This, either using a new bean instance per request, or using the same bean when the sessionForm property has been set to true.

This class is the base class for both framework subclasses like SimpleFormController SimpleFormController and AbstractWizardFormController AbstractWizardFormController , and custom form controllers you can provide yourself.

Both form-input-views and after-submission-views have to be provided programmatically. To provide those views using configuration properties, use the SimpleFormController SimpleFormController .

Subclasses need to override showForm to prepare the form view, processFormSubmission to handle submit requests, and renderFormSubmission to display the results of the submit. For the latter two methods, binding errors like type mismatches will be reported via the given "errors" holder. For additional custom form validation, a validator (property inherited from BaseCommandController) can be used, reporting via the same "errors" instance.

Comparing this Controller to the Struts notion of the Action shows us that with Spring, you can use any ordinary JavaBeans or database- backed JavaBeans without having to implement a framework-specific class (like Struts' ActionForm). More complex properties of JavaBeans (Dates, Locales, but also your own application-specific or compound types) can be represented and submitted to the controller, by using the notion of a java.beans.PropertyEditors. For more information on that subject, see the workflow of this controller and the explanation of the BaseCommandController BaseCommandController .

This controller is different from it's servlet counterpart in that it must take into account the two phases of a portlet request: the action phase and the render phase. See the JSR-168 spec for more details on these two phases. Be especially aware that the action phase is called only once, but that the render phase will be called repeatedly by the portal -- it does this every time the page containing the portlet is updated, even if the activity is in some other portlet. (This is not quite true, the portal can also be told to cache the results of the render for a period of time, but assume it is true for programming purposes.)

Workflow (and that defined by superclass):

  1. The controller receives a request for a new form (typically a Render Request only). The render phase will proceed to display the form as follows.
  2. Call to AbstractFormController.formBackingObject formBackingObject() which by default, returns an instance of the commandClass that has been configured (see the properties the superclass exposes), but can also be overridden to e.g. retrieve an object from the database (that needs to be modified using the form).
  3. Call to AbstractFormController.initBinder initBinder() which allows you to register custom editors for certain fields (often properties of non- primitive or non-String types) of the command class. This will render appropriate Strings for those property values, e.g. locale-specific date strings.
  4. The PortletRequestDataBinder PortletRequestDataBinder gets applied to populate the new form object with initial request parameters and the AbstractFormController.onBindOnNewForm(RenderRequest,Object,BindException) callback method is invoked. (only if bindOnNewForm is set to true) Make sure that the initial parameters do not include the parameter that indicates a form submission has occurred.
  5. Call to AbstractFormController.showForm(RenderRequest,RenderResponse,BindException) showForm to return a View that should be rendered (typically the view that renders the form). This method has to be implemented in subclasses.
  6. The showForm() implementation will call AbstractFormController.referenceData referenceData , which you can implement to provide any relevant reference data you might need when editing a form (e.g. a List of Locale objects you're going to let the user select one from).
  7. Model gets exposed and view gets rendered, to let the user fill in the form.
  8. The controller receives a form submission (typically an Action Request). To use a different way of detecting a form submission, override the AbstractFormController.isFormSubmission isFormSubmission method. The action phase will proceed to process the form submission as follows.
  9. If sessionForm is not set, AbstractFormController.formBackingObjectformBackingObject is called to retrieve a form object. Otherwise, the controller tries to find the command object which is already bound in the session. If it cannot find the object, the action phase does a call to AbstractFormController.handleInvalidSubmit handleInvalidSubmit which - by default - tries to create a new form object and resubmit the form. It then sets a render parameter that will indicate to the render phase that this was an invalid submit.
  10. Still in the action phase of a valid submit, the PortletRequestDataBinder PortletRequestDataBinder gets applied to populate the form object with current request parameters.
  11. Call to AbstractFormController.onBind onBind(PortletRequest, Object, Errors) which allows you to do custom processing after binding but before validation (e.g. to manually bind request parameters to bean properties, to be seen by the Validator).
  12. If validateOnBinding is set, a registered Validator will be invoked. The Validator will check the form object properties, and register corresponding errors via the given Errors Errors object.
  13. Call to AbstractFormController.onBindAndValidate onBindAndValidate which allows you to do custom processing after binding and validation (e.g. to manually bind request parameters, and to validate them outside a Validator).
  14. Call to AbstractFormController.processFormSubmission processFormSubmission to process the submission, with or without binding errors. This method has to be implemented in subclasses and will be called only once per form submission.
  15. The portal will then call the render phase of processing the form submission. This phase will be called repeatedly by the portal every time the page is refreshed. All processing here should take this into account. Any one-time-only actions (such as modifying a database) must be done in the action phase.
  16. If the action phase indicated this is an invalid submit, the render phase calls AbstractFormController.renderInvalidSubmit renderInvalidSubmit which – also by default – will render the results of the resubmitted form. Be sure to override both handleInvalidSubmit and renderInvalidSubmit if you want to change this overall behavior.
  17. Finally, call AbstractFormController.renderFormSubmission renderFormSubmission to render the results of the submission, with or without binding errors. This method has to be implemented in subclasses and will be called repeatedly by the portal.

In session form mode, a submission without an existing form object in the session is considered invalid, like in the case of a resubmit/reload by the browser. The AbstractFormController.handleInvalidSubmit handleInvalidSubmit / AbstractFormController.renderInvalidSubmit renderInvalidSubmit methods are invoked then, by default trying to resubmit. This can be overridden in subclasses to show corresponding messages or to redirect to a new form, in order to avoid duplicate submissions. The form object in the session can be considered a transaction token in that case.

Make sure that any URLs that take you to your form controller are Render URLs, so that it will not try to treat the initial call as a form submission. If you use Action URLs to link to your controller, you will need to override the AbstractFormController.isFormSubmission isFormSubmission method to use a different mechanism for determining whether a form has been submitted. Make sure this method will work for both the ActionRequest and the RenderRequest objects.

Note that views should never retrieve form beans from the session but always from the request, as prepared by the form controller. Remember that some view technologies like Velocity cannot even access a HTTP session.

Exposed configuration properties (and those defined by superclass):
name default description
bindOnNewForm false Indicates whether to bind portlet request parameters when creating a new form. Otherwise, the parameters will only be bound on form submission attempts.
sessionForm false Indicates whether the form object should be kept in the session when a user asks for a new form. This allows you e.g. to retrieve an object from the database, let the user edit it, and then persist it again. Otherwise, a new command object will be created for each request (even when showing the form again after validation errors).
redirectAction false Specifies whether processFormSubmission is expected to call ActionResponse.sendRedirect ActionResponse.sendRedirect . This is important because some methods may not be called before ActionResponse.sendRedirect ActionResponse.sendRedirect (e.g. ActionResponse.setRenderParameter ActionResponse.setRenderParameter ). Setting this flag will prevent AbstractFormController from setting render parameters that it normally needs for the render phase. If this is set true and sendRedirect is not called, then processFormSubmission must call AbstractFormController.setFormSubmit setFormSubmit . Otherwise, the render phase will not realize the form was submitted and will simply display a new blank form.
renderParameters null An array of parameters that will be passed forward from the action phase to the render phase if the form needs to be displayed again. These can also be passed forward explicitly by calling the passRenderParameters method from any action phase method. Abstract descendants of this controller should follow similar behavior. If there are parameters you need in renderFormSubmission, then you need to pass those forward from processFormSubmission. If you override the default behavior of invalid submits and you set sessionForm to true, then you probably will not need to set this because your parameters are only going to be needed on the first request.

Thanks to Rainer Schmitz and Nick Lothian for their suggestions!
author:
   John A. Lewis
author:
   Juergen Hoeller
author:
   Alef Arendsen
author:
   Rob Harrop
since:
   2.0
See Also:   AbstractFormController.showForm(RenderRequest,RenderResponse,BindException)
See Also:   SimpleFormController
See Also:   AbstractWizardFormController




Constructor Summary
public  AbstractFormController()
     Create a new AbstractFormController.

Method Summary
protected  ObjectformBackingObject(PortletRequest request)
     Retrieve a backing object for the current form from the given request.

The properties of the form object will correspond to the form field values in your form view.

final protected  ObjectgetCommand(PortletRequest request)
     Return the form object for the given request.
final protected  BindExceptiongetErrorsForNewForm(RenderRequest request)
     Create a BindException instance for a new form.
protected  StringgetFormSessionAttributeName(PortletRequest request)
     Return the name of the PortletSession attribute that holds the form object for this form controller.
protected  StringgetFormSessionAttributeName()
     Return the name of the PortletSession attribute that holds the form object for this form controller.

Default is an internal name, of no relevance to applications, as the form session attribute is not usually accessed directly.

protected  StringgetFormSubmitParameterName()
     Return the name of the render parameter that indicates this was a form submission.
protected  StringgetInvalidSubmitParameterName()
     Return the name of the render parameter that indicates this was an invalid form submission.
public  String[]getRenderParameters()
     Returns the list of parameters that will be passed forward from the action phase to the render phase whenever the form is rerendered or when AbstractFormController.passRenderParameters is called.
protected  voidhandleActionRequestInternal(ActionRequest request, ActionResponse response)
     Handles action phase of two cases: form submissions and showing a new form.
protected  voidhandleInvalidSubmit(ActionRequest request, ActionResponse response)
     Handle an invalid submit request, e.g.
protected  ModelAndViewhandleRenderRequestInternal(RenderRequest request, RenderResponse response)
     Handles render phase of two cases: form submissions and showing a new form.
final public  booleanisBindOnNewForm()
     Return if request parameters should be bound in case of a new form.
protected  booleanisFormSubmission(PortletRequest request)
     Determine if the given request represents a form submission.

Default implementation checks to see if this is an ActionRequest and treats all action requests as form submission.

protected  booleanisInvalidSubmission(PortletRequest request)
     Determine if the given request represents an invalid form submission.
public  booleanisRedirectAction()
     Return if ActionResponse.sendRedirect is expected to be called in the action phase.
final public  booleanisSessionForm()
     Return if session form mode is activated.
protected  voidonBindOnNewForm(RenderRequest request, Object command, BindException errors)
     Callback for custom post-processing in terms of binding for a new form.
protected  voidonBindOnNewForm(RenderRequest request, Object command)
     Callback for custom post-processing in terms of binding for a new form.
protected  voidpassRenderParameters(ActionRequest request, ActionResponse response)
     Pass the specified list of action request parameters to the render phase by putting them into the action response object.
abstract protected  voidprocessFormSubmission(ActionRequest request, ActionResponse response, Object command, BindException errors)
     Process action phase of form submission request.
protected  MapreferenceData(PortletRequest request, Object command, Errors errors)
     Create a reference data map for the given request, consisting of bean name/bean instance pairs as expected by ModelAndView.
abstract protected  ModelAndViewrenderFormSubmission(RenderRequest request, RenderResponse response, Object command, BindException errors)
     Process render phase of form submission request.
protected  ModelAndViewrenderInvalidSubmit(RenderRequest request, RenderResponse response)
     Handle an invalid submit request, e.g.
final public  voidsetBindOnNewForm(boolean bindOnNewForm)
     Set if request parameters should be bound to the form object in case of a non-submitting request, i.e.
final protected  voidsetFormSubmit(ActionResponse response)
     Set the action response parameter that indicates this in a form submission.
final protected  voidsetInvalidSubmit(ActionResponse response)
     Set the action response parameter that indicates this in an invalid submission.
public  voidsetRedirectAction(boolean redirectAction)
     Specify whether the action phase is expected to call ActionResponse.sendRedirect .
public  voidsetRenderParameters(String[] parameters)
     Specify the list of parameters that should be passed forward from the action phase to the render phase whenever the form is rerendered or when AbstractFormController.passRenderParameters is called.
final public  voidsetSessionForm(boolean sessionForm)
     Activate/deactivate session form mode.
abstract protected  ModelAndViewshowForm(RenderRequest request, RenderResponse response, BindException errors)
     Prepare the form model and view, including reference and error data.
final protected  ModelAndViewshowForm(RenderRequest request, BindException errors, String viewName)
     Prepare model and view for the given form, including reference and errors.
final protected  ModelAndViewshowForm(RenderRequest request, BindException errors, String viewName, Map controlModel)
     Prepare model and view for the given form, including reference and errors, adding a controller-specific control model.

In session form mode: Re-puts the form object in the session when returning to the form, as it has been removed by getCommand.

Can be used in subclasses to redirect back to a specific form page.
Parameters:
  request - current render request
Parameters:
  errors - validation errors holder
Parameters:
  viewName - name of the form view
Parameters:
  controlModel - model map containing controller-specific control data(e.g.

final protected  ModelAndViewshowNewForm(RenderRequest request, RenderResponse response)
     Show a new form.


Constructor Detail
AbstractFormController
public AbstractFormController()(Code)
Create a new AbstractFormController.

Subclasses should set the following properties, either in the constructor or via a BeanFactory: commandName, commandClass, bindOnNewForm, sessionForm. Note that commandClass doesn't need to be set when overriding formBackingObject, as the latter determines the class anyway.

"cacheSeconds" is by default set to 0 (-> no caching for all form controllers).
See Also:   AbstractFormController.setCommandName
See Also:   AbstractFormController.setCommandClass
See Also:   AbstractFormController.setBindOnNewForm
See Also:   AbstractFormController.setSessionForm
See Also:   AbstractFormController.formBackingObject





Method Detail
formBackingObject
protected Object formBackingObject(PortletRequest request) throws Exception(Code)
Retrieve a backing object for the current form from the given request.

The properties of the form object will correspond to the form field values in your form view. This object will be exposed in the model under the specified command name, to be accessed under that name in the view: for example, with a "spring:bind" tag. The default command name is "command".

Note that you need to activate session form mode to reuse the form-backing object across the entire form workflow. Else, a new instance of the command class will be created for each submission attempt, just using this backing object as template for the initial form.

Default implementation calls BaseCommandController.createCommand, creating a new empty instance of the command class. Subclasses can override this to provide a preinitialized backing object.
Parameters:
  request - current portlet request the backing object
throws:
  Exception - in case of invalid state or arguments
See Also:   AbstractFormController.setCommandName
See Also:   AbstractFormController.setCommandClass
See Also:   AbstractFormController.createCommand




getCommand
final protected Object getCommand(PortletRequest request) throws Exception(Code)
Return the form object for the given request.

Calls formBackingObject if the object is not in the session
Parameters:
  request - current request object form to bind onto
See Also:   AbstractFormController.formBackingObject




getErrorsForNewForm
final protected BindException getErrorsForNewForm(RenderRequest request) throws Exception(Code)
Create a BindException instance for a new form. Called by showNewForm.

Can be used directly when intending to show a new form but with special errors registered on it (for example, on invalid submit). Usually, the resulting BindException will be passed to showForm, after registering the errors on it.
Parameters:
  request - current render request the BindException instance
throws:
  Exception - in case of an invalid new form object




getFormSessionAttributeName
protected String getFormSessionAttributeName(PortletRequest request)(Code)
Return the name of the PortletSession attribute that holds the form object for this form controller.

Default implementation delegates to the getFormSessionAttributeName version without arguments.
Parameters:
  request - current HTTP request the name of the form session attribute, or null if not in session form mode
See Also:   AbstractFormController.getFormSessionAttributeName
See Also:   javax.portlet.PortletSession.getAttribute




getFormSessionAttributeName
protected String getFormSessionAttributeName()(Code)
Return the name of the PortletSession attribute that holds the form object for this form controller.

Default is an internal name, of no relevance to applications, as the form session attribute is not usually accessed directly. Can be overridden to use an application-specific attribute name, which allows other code to access the session attribute directly. the name of the form session attribute
See Also:   javax.portlet.PortletSession.getAttribute




getFormSubmitParameterName
protected String getFormSubmitParameterName()(Code)
Return the name of the render parameter that indicates this was a form submission. the name of the render parameter
See Also:   javax.portlet.RenderRequest.getParameter



getInvalidSubmitParameterName
protected String getInvalidSubmitParameterName()(Code)
Return the name of the render parameter that indicates this was an invalid form submission. the name of the render parameter
See Also:   javax.portlet.RenderRequest.getParameter



getRenderParameters
public String[] getRenderParameters()(Code)
Returns the list of parameters that will be passed forward from the action phase to the render phase whenever the form is rerendered or when AbstractFormController.passRenderParameters is called. the list of parameters
See Also:   AbstractFormController.passRenderParameters



handleActionRequestInternal
protected void handleActionRequestInternal(ActionRequest request, ActionResponse response) throws Exception(Code)
Handles action phase of two cases: form submissions and showing a new form. Delegates the decision between the two to isFormSubmission, always treating requests without existing form session attribute as new form when using session form mode.
See Also:   AbstractFormController.isFormSubmission
See Also:   AbstractFormController.processFormSubmission
See Also:   AbstractFormController.handleRenderRequestInternal



handleInvalidSubmit
protected void handleInvalidSubmit(ActionRequest request, ActionResponse response) throws Exception(Code)
Handle an invalid submit request, e.g. when in session form mode but no form object was found in the session (like in case of an invalid resubmit by the browser).

Default implementation simply tries to resubmit the form with a new form object. This should also work if the user hit the back button, changed some form data, and resubmitted the form.

Note: To avoid duplicate submissions, you need to override this method. Most likely you will simply want it to do nothing here in the action phase and diplay an appropriate error and a new form in the render phase.

 protected void handleInvalidSubmit(ActionRequest request, ActionResponse response) throws Exception {
 }

If you override this method but you do need a command object and bind errors in the render phase, be sure to call AbstractFormController.setRenderCommandAndErrors setRenderCommandAndErrors from here.
Parameters:
  request - current action request
Parameters:
  response - current action response
throws:
  Exception - in case of errors
See Also:   AbstractFormController.renderInvalidSubmit
See Also:   AbstractFormController.setRenderCommandAndErrors




handleRenderRequestInternal
protected ModelAndView handleRenderRequestInternal(RenderRequest request, RenderResponse response) throws Exception(Code)
Handles render phase of two cases: form submissions and showing a new form. Delegates the decision between the two to isFormSubmission, always treating requests without existing form session attribute as new form when using session form mode.
See Also:   AbstractFormController.isFormSubmission
See Also:   AbstractFormController.showNewForm
See Also:   AbstractFormController.processFormSubmission
See Also:   AbstractFormController.handleActionRequestInternal



isBindOnNewForm
final public boolean isBindOnNewForm()(Code)
Return if request parameters should be bound in case of a new form.



isFormSubmission
protected boolean isFormSubmission(PortletRequest request)(Code)
Determine if the given request represents a form submission.

Default implementation checks to see if this is an ActionRequest and treats all action requests as form submission. During the action phase it will pass forward a render parameter to indicate to the render phase that this is a form submission. This method can check both kinds of requests and indicate if this is a form submission.

Subclasses can override this to use a custom strategy, e.g. a specific request parameter (assumably a hidden field or submit button name). Make sure that the override can handle both ActionRequest and RenderRequest objects properly.
Parameters:
  request - current request if the request represents a form submission




isInvalidSubmission
protected boolean isInvalidSubmission(PortletRequest request)(Code)
Determine if the given request represents an invalid form submission.



isRedirectAction
public boolean isRedirectAction()(Code)
Return if ActionResponse.sendRedirect is expected to be called in the action phase.



isSessionForm
final public boolean isSessionForm()(Code)
Return if session form mode is activated.



onBindOnNewForm
protected void onBindOnNewForm(RenderRequest request, Object command, BindException errors) throws Exception(Code)
Callback for custom post-processing in terms of binding for a new form. Called when preparing a new form if bindOnNewForm is true.

Default implementation delegates to onBindOnNewForm(request, command).
Parameters:
  request - current render request
Parameters:
  command - the command object to perform further binding on
Parameters:
  errors - validation errors holder, allowing for additionalcustom registration of binding errors
throws:
  Exception - in case of invalid state or arguments
See Also:   AbstractFormController.onBindOnNewForm(RenderRequest,Object)
See Also:   AbstractFormController.setBindOnNewForm




onBindOnNewForm
protected void onBindOnNewForm(RenderRequest request, Object command) throws Exception(Code)
Callback for custom post-processing in terms of binding for a new form. Called by the default implementation of the onBindOnNewForm version with all parameters, after standard binding when displaying the form view. Only called if bindOnNewForm is set to true.

Default implementation is empty.
Parameters:
  request - current render request
Parameters:
  command - the command object to perform further binding on
throws:
  Exception - in case of invalid state or arguments
See Also:   AbstractFormController.onBindOnNewForm(RenderRequest,Object,BindException)
See Also:   AbstractFormController.setBindOnNewForm(boolean)




passRenderParameters
protected void passRenderParameters(ActionRequest request, ActionResponse response)(Code)
Pass the specified list of action request parameters to the render phase by putting them into the action response object. This may not be called when the action will call will call ActionResponse.sendRedirect sendRedirect .
Parameters:
  request - the current action request
Parameters:
  response - the current action response
See Also:   ActionResponse.setRenderParameter



processFormSubmission
abstract protected void processFormSubmission(ActionRequest request, ActionResponse response, Object command, BindException errors) throws Exception(Code)
Process action phase of form submission request. Called by handleRequestInternal in case of a form submission, with or without binding errors. Implementations need to proceed properly, typically performing a submit action if there are no binding errors.

Subclasses can implement this to provide custom submission handling like triggering a custom action. They can also provide custom validation or proceed with the submission accordingly.
Parameters:
  request - current action request
Parameters:
  response - current action response
Parameters:
  command - form object with request parameters bound onto it
Parameters:
  errors - errors holder (subclass can add errors if it wants to)
throws:
  Exception - in case of errors
See Also:   AbstractFormController.handleActionRequestInternal
See Also:   AbstractFormController.renderFormSubmission
See Also:   AbstractFormController.isFormSubmission
See Also:   org.springframework.validation.Errors




referenceData
protected Map referenceData(PortletRequest request, Object command, Errors errors) throws Exception(Code)
Create a reference data map for the given request, consisting of bean name/bean instance pairs as expected by ModelAndView.

Default implementation returns null. Subclasses can override this to set reference data used in the view.
Parameters:
  request - current render request
Parameters:
  command - form object with request parameters bound onto it
Parameters:
  errors - validation errors holder a Map with reference data entries, or null if none
throws:
  Exception - in case of invalid state or arguments
See Also:   ModelAndView




renderFormSubmission
abstract protected ModelAndView renderFormSubmission(RenderRequest request, RenderResponse response, Object command, BindException errors) throws Exception(Code)
Process render phase of form submission request. Called by handleRequestInternal in case of a form submission, with or without binding errors. Implementations need to proceed properly, typically showing a form view in case of binding errors or rendering the result of a submit action else.

For a success view, call errors.getModel() to populate the ModelAndView model with the command and the Errors instance, under the specified command name, as expected by the "spring:bind" tag. For a form view, simply return the ModelAndView object privded by showForm.
Parameters:
  request - current render request
Parameters:
  response - current render response
Parameters:
  command - form object with request parameters bound onto it
Parameters:
  errors - errors holder the prepared model and view, or null
throws:
  Exception - in case of errors
See Also:   AbstractFormController.handleRenderRequestInternal
See Also:   AbstractFormController.processFormSubmission
See Also:   AbstractFormController.isFormSubmission
See Also:   AbstractFormController.showForm(RenderRequest,RenderResponse,BindException)
See Also:   org.springframework.validation.Errors
See Also:   org.springframework.validation.BindException.getModel




renderInvalidSubmit
protected ModelAndView renderInvalidSubmit(RenderRequest request, RenderResponse response) throws Exception(Code)
Handle an invalid submit request, e.g. when in session form mode but no form object was found in the session (like in case of an invalid resubmit by the browser).

Default implementation simply tries to resubmit the form with a new form object. This should also work if the user hit the back button, changed some form data, and resubmitted the form.

Note: To avoid duplicate submissions, you need to override this method. Either show some "invalid submit" message, or call showNewForm for resetting the form (prepopulating it with the current values if "bindOnNewForm" is true). In this case, the form object in the session serves as transaction token.

 protected ModelAndView handleInvalidSubmit(RenderRequest request, RenderResponse response) throws Exception {
 return showNewForm(request, response);
 }
You can also show a new form but with special errors registered on it:
 protected ModelAndView handleInvalidSubmit(RenderRequest request, RenderResponse response) throws Exception {
 BindException errors = getErrorsForNewForm(request);
 errors.reject("duplicateFormSubmission", "Duplicate form submission");
 return showForm(request, response, errors);
 }

WARNING: If you override this method, be sure to also override the action phase version of this method so that it will not attempt to perform the resubmit action by default.
Parameters:
  request - current render request
Parameters:
  response - current render response a prepared view, or null if handled directly
throws:
  Exception - in case of errors
See Also:   AbstractFormController.handleInvalidSubmit




setBindOnNewForm
final public void setBindOnNewForm(boolean bindOnNewForm)(Code)
Set if request parameters should be bound to the form object in case of a non-submitting request, i.e. a new form.



setFormSubmit
final protected void setFormSubmit(ActionResponse response)(Code)
Set the action response parameter that indicates this in a form submission.
Parameters:
  response - the current action response
See Also:   AbstractFormController.getFormSubmitParameterName()



setInvalidSubmit
final protected void setInvalidSubmit(ActionResponse response)(Code)
Set the action response parameter that indicates this in an invalid submission.
Parameters:
  response - the current action response
See Also:   AbstractFormController.getInvalidSubmitParameterName()



setRedirectAction
public void setRedirectAction(boolean redirectAction)(Code)
Specify whether the action phase is expected to call ActionResponse.sendRedirect . This information is important because some methods may not be called before ActionResponse.sendRedirect , e.g. ActionResponse.setRenderParameter and ActionResponse.setRenderParameters .
Parameters:
  redirectAction - true if ActionResponse#sendRedirect is expected to be called
See Also:   ActionResponse.sendRedirect



setRenderParameters
public void setRenderParameters(String[] parameters)(Code)
Specify the list of parameters that should be passed forward from the action phase to the render phase whenever the form is rerendered or when AbstractFormController.passRenderParameters is called.
See Also:   AbstractFormController.passRenderParameters



setSessionForm
final public void setSessionForm(boolean sessionForm)(Code)
Activate/deactivate session form mode. In session form mode, the form is stored in the session to keep the form object instance between requests, instead of creating a new one on each request.

This is necessary for either wizard-style controllers that populate a single form object from multiple pages, or forms that populate a persistent object that needs to be identical to allow for tracking changes.




showForm
abstract protected ModelAndView showForm(RenderRequest request, RenderResponse response, BindException errors) throws Exception(Code)
Prepare the form model and view, including reference and error data. Can show a configured form page, or generate a form view programmatically.

A typical implementation will call showForm(request, errors, "myView") to prepare the form view for a specific view name, returning the ModelAndView provided there.

For building a custom ModelAndView, call errors.getModel() to populate the ModelAndView model with the command and the Errors instance, under the specified command name, as expected by the "spring:bind" tag. You also need to include the model returned by referenceData.

Note: If you decide to have a "formView" property specifying the view name, consider using SimpleFormController.
Parameters:
  request - current render request
Parameters:
  response - current render response
Parameters:
  errors - validation errors holder the prepared form view, or null if handled directly
throws:
  Exception - in case of invalid state or arguments
See Also:   AbstractFormController.showForm(RenderRequest,BindException,String)
See Also:   org.springframework.validation.Errors
See Also:   org.springframework.validation.BindException.getModel
See Also:   AbstractFormController.referenceData(PortletRequest,Object,Errors)
See Also:   SimpleFormController.setFormView




showForm
final protected ModelAndView showForm(RenderRequest request, BindException errors, String viewName) throws Exception(Code)
Prepare model and view for the given form, including reference and errors.

In session form mode: Re-puts the form object in the session when returning to the form, as it has been removed by getCommand.

Can be used in subclasses to redirect back to a specific form page.
Parameters:
  request - current render request
Parameters:
  errors - validation errors holder
Parameters:
  viewName - name of the form view the prepared form view
throws:
  Exception - in case of invalid state or arguments
See Also:   AbstractFormController.showForm(RenderRequest,BindException,String,Map)
See Also:   AbstractFormController.showForm(RenderRequest,RenderResponse,BindException)




showForm
final protected ModelAndView showForm(RenderRequest request, BindException errors, String viewName, Map controlModel) throws Exception(Code)
Prepare model and view for the given form, including reference and errors, adding a controller-specific control model.

In session form mode: Re-puts the form object in the session when returning to the form, as it has been removed by getCommand.

Can be used in subclasses to redirect back to a specific form page.
Parameters:
  request - current render request
Parameters:
  errors - validation errors holder
Parameters:
  viewName - name of the form view
Parameters:
  controlModel - model map containing controller-specific control data(e.g. current page in wizard-style controllers or special error message) the prepared form view
throws:
  Exception - in case of invalid state or arguments
See Also:   AbstractFormController.showForm(RenderRequest,BindException,String)
See Also:   AbstractFormController.showForm(RenderRequest,RenderResponse,BindException)




showNewForm
final protected ModelAndView showNewForm(RenderRequest request, RenderResponse response) throws Exception(Code)
Show a new form. Prepares a backing object for the current form and the given request, including checking its validity.
Parameters:
  request - current render request
Parameters:
  response - current render response the prepared form view
throws:
  Exception - in case of an invalid new form object
See Also:   AbstractFormController.getErrorsForNewForm



Fields inherited from org.springframework.web.portlet.mvc.BaseCommandController
final public static String DEFAULT_COMMAND_NAME(Code)(Java Doc)

Methods inherited from org.springframework.web.portlet.mvc.BaseCommandController
final protected PortletRequestDataBinder bindAndValidate(PortletRequest request, Object command) throws Exception(Code)(Java Doc)
final protected boolean checkCommand(Object command)(Code)(Java Doc)
protected PortletRequestDataBinder createBinder(PortletRequest request, Object command) throws Exception(Code)(Java Doc)
final protected Object createCommand() throws Exception(Code)(Java Doc)
final public BindingErrorProcessor getBindingErrorProcessor()(Code)(Java Doc)
protected Object getCommand(PortletRequest request) throws Exception(Code)(Java Doc)
final public Class getCommandClass()(Code)(Java Doc)
final public String getCommandName()(Code)(Java Doc)
final public MessageCodesResolver getMessageCodesResolver()(Code)(Java Doc)
final public PropertyEditorRegistrar[] getPropertyEditorRegistrars()(Code)(Java Doc)
final protected Object getRenderCommand(RenderRequest request) throws PortletException(Code)(Java Doc)
protected String getRenderCommandSessionAttributeName()(Code)(Java Doc)
final protected BindException getRenderErrors(RenderRequest request) throws PortletException(Code)(Java Doc)
protected String getRenderErrorsSessionAttributeName()(Code)(Java Doc)
final public Validator getValidator()(Code)(Java Doc)
final public Validator[] getValidators()(Code)(Java Doc)
protected void initApplicationContext()(Code)(Java Doc)
protected void initBinder(PortletRequest request, PortletRequestDataBinder binder) throws Exception(Code)(Java Doc)
final public boolean isValidateOnBinding()(Code)(Java Doc)
protected void onBind(PortletRequest request, Object command, BindException errors) throws Exception(Code)(Java Doc)
protected void onBind(PortletRequest request, Object command) throws Exception(Code)(Java Doc)
protected void onBindAndValidate(PortletRequest request, Object command, BindException errors) throws Exception(Code)(Java Doc)
final protected void prepareBinder(PortletRequestDataBinder binder)(Code)(Java Doc)
final public void setBindingErrorProcessor(BindingErrorProcessor bindingErrorProcessor)(Code)(Java Doc)
final public void setCommandClass(Class commandClass)(Code)(Java Doc)
final public void setCommandName(String commandName)(Code)(Java Doc)
final public void setMessageCodesResolver(MessageCodesResolver messageCodesResolver)(Code)(Java Doc)
final public void setPropertyEditorRegistrar(PropertyEditorRegistrar propertyEditorRegistrar)(Code)(Java Doc)
final public void setPropertyEditorRegistrars(PropertyEditorRegistrar[] propertyEditorRegistrars)(Code)(Java Doc)
final protected void setRenderCommandAndErrors(ActionRequest request, Object command, BindException errors) throws Exception(Code)(Java Doc)
final public void setValidateOnBinding(boolean validateOnBinding)(Code)(Java Doc)
final public void setValidator(Validator validator)(Code)(Java Doc)
final public void setValidators(Validator[] validators)(Code)(Java Doc)
protected boolean suppressBinding(PortletRequest request)(Code)(Java Doc)
protected boolean suppressValidation(PortletRequest request)(Code)(Java Doc)
protected boolean useDirectFieldAccess()(Code)(Java Doc)

Methods inherited from org.springframework.web.portlet.mvc.AbstractController
final public void handleActionRequest(ActionRequest request, ActionResponse response) throws Exception(Code)(Java Doc)
protected void handleActionRequestInternal(ActionRequest request, ActionResponse response) throws Exception(Code)(Java Doc)
final public ModelAndView handleRenderRequest(RenderRequest request, RenderResponse response) throws Exception(Code)(Java Doc)
protected ModelAndView handleRenderRequestInternal(RenderRequest request, RenderResponse response) throws Exception(Code)(Java Doc)
public boolean isRenderWhenMinimized()(Code)(Java Doc)
final public boolean isSynchronizeOnSession()(Code)(Java Doc)
public void setRenderWhenMinimized(boolean renderWhenMinimized)(Code)(Java Doc)
final public void setSynchronizeOnSession(boolean synchronizeOnSession)(Code)(Java Doc)

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