Form (Tapestry 5 Project 5.1.0.0-SNAPSHOT API)

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org.apache.tapestry5.corelib.components
Class Form

java.lang.Object
  org.apache.tapestry5.corelib.components.Form

All Implemented Interfaces:: ClientElement, FormValidationControl

public class Form
extends Object
implements ClientElement, FormValidationControl
extends Object
implements ClientElement, FormValidationControl

An HTML form, which will enclose other components to render out the various types of fields.

A Form emits many notification events. When it renders, it fires a EventConstants.PREPARE_FOR_RENDER notification, followed by a EventConstants.PREPARE notification.

When the form is submitted, the component emits several notifications: first a EventConstants.PREPARE_FOR_SUBMIT, then a EventConstants.PREPARE: these allow the page to update its state as necessary to prepare for the form submission, then (after components enclosed by the form have operated), a EventConstants.VALIDATE_FORM event is emitted, to allow for cross-form validation. After that, either a EventConstants.SUCCESS OR EventConstants.FAILURE event (depending on whether the ValidationTracker has recorded any errors). Lastly, a EventConstants.SUBMIT event, for any listeners that care only about form submission, regardless of success or failure.

For all of these notifications, the event context is derived from the context parameter. This context is encoded into the form's action URI (the parameter is not read when the form is submitted, instead the values encoded into the form are used).

Field Summary
`static String`	`FAILURE` Deprecated. Use constant from `EventConstants` instead.
`static String`	`FORM_DATA` Query parameter name storing form data (the serialized commands needed to process a form submission).
`static String`	`PREPARE` Deprecated. Use constant from `EventConstants` instead.
`static String`	`PREPARE_FOR_RENDER` Deprecated. Use constant from `EventConstants` instead.
`static String`	`PREPARE_FOR_SUBMIT` Deprecated. Use constant from `EventConstants` instead.
`static String`	`SUBMIT` Deprecated. Use constant from `EventConstants` instead.
`static String`	`SUCCESS` Deprecated. Use constant from `EventConstants` instead.
`static String`	`VALIDATE_FORM` Deprecated. Use constant from `EventConstants` instead.

Constructor Summary
`Form()`

Method Summary
`void`	`clearErrors()` Invokes `ValidationTracker.clear()`.
`String`	`getClientId()` Forms use the same value for their name and their id attribute.
`ValidationTracker`	`getDefaultTracker()`
`boolean`	`getHasErrors()` Returns true if the form's `ValidationTracker` contains any `errors`.
`boolean`	`isValid()` Returns true if the form's `ValidationTracker` does not contain any `errors`.
`void`	`recordError(Field field, String errorMessage)` A convienience for invoking `ValidationTracker.recordError(Field, String)`.
`void`	`recordError(String errorMessage)` A convienience for invoking `ValidationTracker.recordError(String)`.
`void`	`setDefaultTracker(ValidationTracker defaultTracker)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail