org.apache.wicket.ajax.form

Class AjaxFormComponentUpdatingBehavior

java.lang.Object

org.apache.wicket.behavior.Behavior

org.apache.wicket.behavior.AbstractAjaxBehavior

org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

org.apache.wicket.ajax.AjaxEventBehavior

org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior

All Implemented Interfaces:

Serializable, IComponentAwareEventSink, IRequestListener, IComponentAwareHeaderContributor, org.apache.wicket.util.io.IClusterable

Direct Known Subclasses:

AjaxFormChoiceComponentUpdatingBehavior, OnChangeAjaxBehavior

public abstract class AjaxFormComponentUpdatingBehavior
extends AjaxEventBehavior

A behavior that updates the hosting FormComponent via ajax when an event it is attached to is triggered. This behavior encapsulates the entire form-processing workflow as relevant only to this component so if validation is successful the component's model will be updated according to the submitted value.

NOTE: This behavior does not validate any IFormValidators attached to this form even though they may reference the component being updated.

NOTE: This behavior does not work on Choices or Groups use the AjaxFormChoiceComponentUpdatingBehavior for that.

Since:

1.2

Author:

Igor Vaynberg (ivaynberg)

See Also:

onUpdate(org.apache.wicket.ajax.AjaxRequestTarget), onError(org.apache.wicket.ajax.AjaxRequestTarget, RuntimeException), Serialized Form

Field Summary

Fields inherited from class org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

INDICATOR

Constructor Summary

Constructors

Constructor and Description
AjaxFormComponentUpdatingBehavior(String event) Construct.

Method Summary

Modifier and Type	Method and Description
protected void	checkComponent(FormComponent<?> component) Check the component this behavior is bound to.
protected boolean	disableFocusOnBlur() Determines whether the focus will not be restored when the event is blur.
protected FormComponent<?>	getFormComponent()
protected boolean	getUpdateModel() Gives the control to the application to decide whether the form component model should be updated automatically or not.
protected void	onBind() Subclasses should call super.onBind()
protected void	onError(AjaxRequestTarget target, RuntimeException e) Called to handle any error resulting from updating form component.
protected void	onEvent(AjaxRequestTarget target) Listener method for the ajax event
protected abstract void	onUpdate(AjaxRequestTarget target) Listener invoked on the ajax request.
static AjaxFormComponentUpdatingBehavior	onUpdate(String eventName, org.danekja.java.util.function.serializable.SerializableConsumer<AjaxRequestTarget> onUpdate) Creates an AjaxFormComponentUpdatingBehavior based on lambda expressions
protected void	updateAjaxAttributes(AjaxRequestAttributes attributes) Gives a chance to the specializations to modify the attributes.

Methods inherited from class org.apache.wicket.ajax.AjaxEventBehavior

getEvent, onEvent, renderHead, respond

Methods inherited from class org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

findIndicatorId, getAttributes, getCallbackFunction, getCallbackFunctionBody, getCallbackScript, getCallbackScript, onRequest, postprocessConfiguration, renderAjaxAttributes, renderAjaxAttributes

Methods inherited from class org.apache.wicket.behavior.AbstractAjaxBehavior

afterRender, bind, getCallbackUrl, getComponent, onComponentRendered, onComponentTag, onComponentTag, onUnbind, unbind

Methods inherited from class org.apache.wicket.behavior.Behavior

beforeRender, canCallListener, detach, getStatelessHint, isEnabled, isTemporary, onAttribute, onConfigure, onEvent, onException, onRemove, onTag

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wicket.IRequestListener

rendersPage

Constructor Detail

AjaxFormComponentUpdatingBehavior

public AjaxFormComponentUpdatingBehavior(String event)

Construct.

Parameters:

event - event to trigger this behavior

Method Detail

onBind

protected void onBind()

Description copied from class: AbstractDefaultAjaxBehavior

Subclasses should call super.onBind()

Overrides:

onBind in class AbstractDefaultAjaxBehavior

See Also:

AbstractAjaxBehavior.onBind()

checkComponent

protected void checkComponent(FormComponent<?> component)

Check the component this behavior is bound to.

Logs a warning in development mode when an AjaxFormChoiceComponentUpdatingBehavior should be used.

Parameters:

component - bound component

getFormComponent

protected final FormComponent<?> getFormComponent()

Returns:

FormComponent

updateAjaxAttributes

protected void updateAjaxAttributes(AjaxRequestAttributes attributes)

Description copied from class: AbstractDefaultAjaxBehavior

Gives a chance to the specializations to modify the attributes.

Overrides:

updateAjaxAttributes in class AjaxEventBehavior

onEvent

protected final void onEvent(AjaxRequestTarget target)

Description copied from class: AjaxEventBehavior

Listener method for the ajax event

Specified by:

onEvent in class AjaxEventBehavior

Parameters:

target - the current request handler

See Also:

AjaxEventBehavior.onEvent(org.apache.wicket.ajax.AjaxRequestTarget)

getUpdateModel

protected boolean getUpdateModel()

Gives the control to the application to decide whether the form component model should be updated automatically or not. Make sure to call FormComponent.valid() additionally in case the application want to update the model manually.

Returns:

true if the model of form component should be updated, false otherwise

disableFocusOnBlur

protected boolean disableFocusOnBlur()

Determines whether the focus will not be restored when the event is blur. By default this is true, as we don't want to re-focus component on blur event.

Returns:

true if refocusing should be disabled, false otherwise

onUpdate

protected abstract void onUpdate(AjaxRequestTarget target)

Listener invoked on the ajax request. This listener is invoked after the component's model has been updated.

Note: onError(AjaxRequestTarget, RuntimeException) is called instead when processing of the FormComponent failed with conversion or validation errors!

Parameters:

target - the current request handler

onError

protected void onError(AjaxRequestTarget target,
                       RuntimeException e)

Called to handle any error resulting from updating form component. Errors thrown from onUpdate(org.apache.wicket.ajax.AjaxRequestTarget) will not be caught here. The RuntimeException will be null if it was just a validation or conversion error of the FormComponent

Parameters:

target - the current request handler

e - the error that occurred during the update of the component

onUpdate

public static AjaxFormComponentUpdatingBehavior onUpdate(String eventName,
                                                         org.danekja.java.util.function.serializable.SerializableConsumer<AjaxRequestTarget> onUpdate)

Creates an AjaxFormComponentUpdatingBehavior based on lambda expressions

Parameters:

eventName - the event name

onUpdate - the SerializableConsumer which accepts the AjaxRequestTarget

Returns:

the AjaxFormComponentUpdatingBehavior