org.apache.tapestry5.corelib.internal
Class FormSupportImpl

java.lang.Object
  org.apache.tapestry5.corelib.internal.FormSupportImpl

All Implemented Interfaces:

ClientElement, InternalFormSupport, Locatable, FormSupport

public class FormSupportImpl
extends Object
implements InternalFormSupport, Locatable

Provides support to components enclosed by a form when the form is rendering (allowing the components to registry form submit callback commands), and also during form submission time.

TODO: Most methods should only be invokable depending on whether the form is rendering or processing a submission.

Constructor Summary

FormSupportImpl(ComponentResources resources, String formValidationId)
Constructor used when processing a form submission.

FormSupportImpl(ComponentResources resources, String clientId, ComponentActionSink actionSink, ClientBehaviorSupport clientBehaviorSupport, boolean clientValidationEnabled, IdAllocator idAllocator, String formValidationId)
Full constructor (specifically constructor for render time).

Method Summary

void	addValidation(Field field, String validationName, String message, Object constraint) Collects field validation information.
String	allocateControlName(String id) Allocates a unique (within the form) control name for some enclosed component, based on the component's id.
void	defer(Runnable command) Defers a command until the end of the form submission.
void	executeDeferred() Executes any deferred callbacks added via FormSupport.defer(Runnable).
String	getClientId() Returns a unique id for the element.
String	getEncodingType() Returns the form encoding type, if one has been set via a call to FormSupport.setEncodingType(String).
String	getFormComponentId() Returns the complete id of the underlying Form component.
String	getFormValidationId() Id used as a prefix when searching Messages for validation messages and constraints.
Location	getLocation() Returns the location associated with this object for error reporting purposes.
boolean	isClientValidationEnabled() Return true if client validation is enabled for this form, false otherwise.
void	setEncodingType(String encodingType) Sets the encoding type for the Form.
<T> void	store(T component, ComponentAction<T> action) Stores an action for execution during a later request.
<T> void	storeAndExecute(T component, ComponentAction<T> action) As with FormSupport.store(Object, org.apache.tapestry5.ComponentAction)}, but the action is also invoked immediately.

Methods inherited from class java.lang.Object

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

Constructor Detail

FormSupportImpl

public FormSupportImpl(ComponentResources resources,
                       String formValidationId)

Constructor used when processing a form submission.

FormSupportImpl

public FormSupportImpl(ComponentResources resources,
                       String clientId,
                       ComponentActionSink actionSink,
                       ClientBehaviorSupport clientBehaviorSupport,
                       boolean clientValidationEnabled,
                       IdAllocator idAllocator,
                       String formValidationId)

Full constructor (specifically constructor for render time).

Method Detail

getLocation

public Location getLocation()

Description copied from interface: Locatable

Returns the location associated with this object for error reporting purposes.

Specified by:

getLocation in interface Locatable

getFormComponentId

public String getFormComponentId()

Description copied from interface: FormSupport

Returns the complete id of the underlying Form component. This is needed by FormInjector.

Specified by:

getFormComponentId in interface FormSupport

allocateControlName

public String allocateControlName(String id)

Description copied from interface: FormSupport

Allocates a unique (within the form) control name for some enclosed component, based on the component's id.

Specified by:

allocateControlName in interface FormSupport

Parameters:

id - the component's id

Returns:

a unique string, usually the component's id, but sometime extended with a unique number or string

store

public <T> void store(T component,
                      ComponentAction<T> action)

Description copied from interface: FormSupport

Stores an action for execution during a later request. If the action contains any mutable state, it should be in its final state before invoking this method and its internal state should not be changed subsequently.

Specified by:

store in interface FormSupport

storeAndExecute

public <T> void storeAndExecute(T component,
                                ComponentAction<T> action)

Description copied from interface: FormSupport

As with FormSupport.store(Object, org.apache.tapestry5.ComponentAction)}, but the action is also invoked immediately. This is useful for defining an action that should occur symmetrically in both the render request and the form submission's action request.

Specified by:

storeAndExecute in interface FormSupport

Parameters:

component - component against which to trigger the action

action - the action that will be triggered (and passed the component)

defer

public void defer(Runnable command)

Description copied from interface: FormSupport

Defers a command until the end of the form submission. The command will be executed before the Form's validate notification, but after all other submit actions for the form have been processed. This is used, primarily, to coordinate validations or other operations that involve multiple components, when the order of the components can not be determined. During a form render, runnables are executed after the body of the form has rendered.

Specified by:

defer in interface FormSupport

Parameters:

command - to be executed

executeDeferred

public void executeDeferred()

Description copied from interface: InternalFormSupport

Executes any deferred callbacks added via FormSupport.defer(Runnable).

Specified by:

executeDeferred in interface InternalFormSupport

getClientId

public String getClientId()

Description copied from interface: ClientElement

Returns a unique id for the element. This value will be unique for any given rendering of a page. This value is intended for use as the id attribute of the client-side element, and will be used with any DHTML/Ajax related JavaScript.

Specified by:

getClientId in interface ClientElement

getEncodingType

public String getEncodingType()

Description copied from interface: InternalFormSupport

Returns the form encoding type, if one has been set via a call to FormSupport.setEncodingType(String).

Specified by:

getEncodingType in interface InternalFormSupport

setEncodingType

public void setEncodingType(String encodingType)

Description copied from interface: FormSupport

Sets the encoding type for the Form. This should only be set once, and if

Specified by:

setEncodingType in interface FormSupport

Parameters:

encodingType - MIME type indicating type of encoding for the form

addValidation

public void addValidation(Field field,
                          String validationName,
                          String message,
                          Object constraint)

Description copied from interface: FormSupport

Collects field validation information. A Form may turn off client-side validation, in which case these calls will be ignored.

Specified by:

addValidation in interface FormSupport

Parameters:

field - for which validation is being generated

validationName - name of validation method (see Tapestry.Validation in tapestry.js)

message - the error message to display if the field is invalid

constraint - additional constraint value, or null for validations that don't require a constraint

isClientValidationEnabled

public boolean isClientValidationEnabled()

Description copied from interface: FormSupport

Return true if client validation is enabled for this form, false otherwise.

Specified by:

isClientValidationEnabled in interface FormSupport

getFormValidationId

public String getFormValidationId()

Description copied from interface: FormSupport

Id used as a prefix when searching Messages for validation messages and constraints. This is normally the simple id of the form.

Specified by:

getFormValidationId in interface FormSupport

Returns:

validation id string

See Also:

FieldTranslatorSource, FieldValidatorSource