org.apache.tapestry5.services
Interface FormSupport

All Superinterfaces:

ClientElement

All Known Subinterfaces:

InternalFormSupport

All Known Implementing Classes:

FormSupportAdapter, FormSupportImpl

public interface FormSupport
extends ClientElement

Services provided by an enclosing Form control component to the various form element components it encloses. Implements ClientElement, to share the id of the enclosing form.

See Also:

Field

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.
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.
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 store(Object, org.apache.tapestry5.ComponentAction)}, but the action is also invoked immediately.

Methods inherited from interface org.apache.tapestry5.ClientElement

getClientId

Method Detail

allocateControlName

String allocateControlName(String id)

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

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

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

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.

storeAndExecute

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

As with 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.

Parameters:

component - component against which to trigger the action

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

defer

void defer(Runnable command)

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.

Parameters:

command - to be executed

setEncodingType

void setEncodingType(String encodingType)

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

Parameters:

encodingType - MIME type indicating type of encoding for the form

Throws:

IllegalStateException - if the encoding type has already been set to a value different than the supplied

addValidation

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

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

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

boolean isClientValidationEnabled()

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

getFormComponentId

String getFormComponentId()

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

getFormValidationId

String getFormValidationId()

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

Returns:

validation id string

See Also:

FieldTranslatorSource, FieldValidatorSource