org.springframework.webflow.action
Class FormObjectAccessor

java.lang.Object
  org.springframework.webflow.action.FormObjectAccessor

public class FormObjectAccessor
extends java.lang.Object

Convenience helper that encapsulates logic on how to retrieve and expose form objects and associated errors to and from a flow execution request context.

Note: The form object available under the well known attribute name will be the last ("current") form object set in the request context. The same is true for the associated errors object. This implies that special care should be taken when accessing the form object using this alias if there are multiple form objects available in the flow execution request context!

Author:

Keith Donald, Erwin Vervaet

See Also:

RequestContext, Errors

Constructor Summary

FormObjectAccessor(RequestContext context)
Creates a form object accessor that wraps the given context.

Method Summary

org.springframework.validation.Errors	getCurrentFormErrors() Gets the form object Errors tracker from the context, using the form object name.
org.springframework.validation.Errors	getCurrentFormErrors(ScopeType scopeType) Gets the form object Errors tracker from the context, using the form object name.
static java.lang.String	getCurrentFormErrorsName() Returns the current form object errors attribute name.
java.lang.Object	getCurrentFormObject() Gets the form object from the context, using the well-known attribute name.
java.lang.Object	getCurrentFormObject(ScopeType scopeType) Gets the form object from the context, using the well-known attribute name.
static java.lang.String	getCurrentFormObjectName() Returns the current form object name.
org.springframework.validation.Errors	getFormErrors(java.lang.String formObjectName, ScopeType scopeType) Gets the form object Errors tracker from the context, using the specified form object name.
java.lang.Object	getFormObject(java.lang.String formObjectName, java.lang.Class<?> formObjectClass, ScopeType scopeType) Gets the form object from the context, using the specified name.
java.lang.Object	getFormObject(java.lang.String formObjectName, ScopeType scopeType) Gets the form object from the context, using the specified name.
void	putFormErrors(org.springframework.validation.Errors errors, ScopeType scopeType) Expose given errors instance in the specified scope.
void	putFormObject(java.lang.Object formObject, java.lang.String formObjectName, ScopeType scopeType) Expose given form object using given name in specified scope.
void	setCurrentFormErrors(org.springframework.validation.Errors errors, ScopeType scopeType) Expose given errors instance using the well known alias in the specified scope.
void	setCurrentFormObject(java.lang.Object formObject, ScopeType scopeType) Expose given form object using the well known alias in the specified scope.

Methods inherited from class java.lang.Object

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

Constructor Detail

FormObjectAccessor

public FormObjectAccessor(RequestContext context)

Creates a form object accessor that wraps the given context.

Parameters:

context - the flow execution request context

Method Detail

getCurrentFormObjectName

public static java.lang.String getCurrentFormObjectName()

Returns the current form object name.

Returns:

the current form object name

getCurrentFormErrorsName

public static java.lang.String getCurrentFormErrorsName()

Returns the current form object errors attribute name.

Returns:

the current form object errors attribute name

getCurrentFormObject

public java.lang.Object getCurrentFormObject()

Gets the form object from the context, using the well-known attribute name. Will try all scopes.

Returns:

the form object, or null if not found

getCurrentFormObject

public java.lang.Object getCurrentFormObject(ScopeType scopeType)

Gets the form object from the context, using the well-known attribute name.

Parameters:

scopeType - the scope to obtain the form object from

Returns:

the form object, or null if not found

setCurrentFormObject

public void setCurrentFormObject(java.lang.Object formObject,
                                 ScopeType scopeType)

Expose given form object using the well known alias in the specified scope.

Parameters:

formObject - the form object

scopeType - the scope in which to expose the form object

getFormObject

public java.lang.Object getFormObject(java.lang.String formObjectName,
                                      ScopeType scopeType)

Gets the form object from the context, using the specified name.

Parameters:

formObjectName - the name of the form object in the context

scopeType - the scope to obtain the form object from

Returns:

the form object, or null if not found

getFormObject

public java.lang.Object getFormObject(java.lang.String formObjectName,
                                      java.lang.Class<?> formObjectClass,
                                      ScopeType scopeType)

Gets the form object from the context, using the specified name.

Parameters:

formObjectName - the name of the form in the context

formObjectClass - the class of the form object, which will be verified

scopeType - the scope to obtain the form object from

Returns:

the form object, or null if not found

putFormObject

public void putFormObject(java.lang.Object formObject,
                          java.lang.String formObjectName,
                          ScopeType scopeType)

Expose given form object using given name in specified scope. Given object will become the current form object.

Parameters:

formObject - the form object

formObjectName - the name of the form object

scopeType - the scope in which to expose the form object

getCurrentFormErrors

public org.springframework.validation.Errors getCurrentFormErrors()

Gets the form object Errors tracker from the context, using the form object name. This method will search all scopes.

Returns:

the form object Errors tracker, or null if not found

getCurrentFormErrors

public org.springframework.validation.Errors getCurrentFormErrors(ScopeType scopeType)

Gets the form object Errors tracker from the context, using the form object name.

Parameters:

scopeType - the scope to obtain the errors from

Returns:

the form object Errors tracker, or null if not found

setCurrentFormErrors

public void setCurrentFormErrors(org.springframework.validation.Errors errors,
                                 ScopeType scopeType)

Expose given errors instance using the well known alias in the specified scope.

Parameters:

errors - the errors instance

scopeType - the scope in which to expose the errors instance

getFormErrors

public org.springframework.validation.Errors getFormErrors(java.lang.String formObjectName,
                                                           ScopeType scopeType)

Gets the form object Errors tracker from the context, using the specified form object name.

Parameters:

formObjectName - the name of the Errors object, which will be prefixed with BindingResult.MODEL_KEY_PREFIX

scopeType - the scope to obtain the errors from

Returns:

the form object errors instance, or null if not found

putFormErrors

public void putFormErrors(org.springframework.validation.Errors errors,
                          ScopeType scopeType)

Expose given errors instance in the specified scope. Given errors instance will become the current form errors instance.

Parameters:

errors - the errors object

scopeType - the scope to expose the errors in