org.apache.wicket.behavior
Class AbstractBehavior

java.lang.Object
  org.apache.wicket.behavior.AbstractBehavior

All Implemented Interfaces:

java.io.Serializable, IBehavior, IClusterable, IHeaderContributor

Direct Known Subclasses:

AbstractAjaxBehavior, AbstractHeaderContributor, AbstractTransformerBehavior, AttributeModifier, ContainerWithAssociatedMarkupHelper, DatePicker, SimpleAttributeModifier, VelocityContributor, WicketAjaxIndicatorAppender, WicketMessageTagHandler.AttributeLocalizer

public abstract class AbstractBehavior
extends java.lang.Object
implements IBehavior, IHeaderContributor

Adapter implementation of IBehavior. It is recommended to extend from this class instead of directly implementing IBehavior as this class has an extra clean

Author:

Ralf Ebert, Eelco Hillenius

See Also:

Serialized Form

Constructor Summary

AbstractBehavior()
Construct.

Method Summary

void	afterRender(Component component) Called when a component that has this behavior coupled was rendered.
void	beforeRender(Component component) Called when a component is about to render.
void	bind(Component component) Bind this handler to the given component.
void	cleanup() This method is called either by onRendered(Component) or onException(Component, RuntimeException) AFTER they called their respective template methods.
void	detach(Component component) Allows the behavior to detach any state it has attached during request processing.
void	detachModel(Component component) Deprecated. replaced by detach(Component)
void	exception(Component component, java.lang.RuntimeException exception) In case an unexpected exception happened anywhere between onComponentTag() and rendered(), onException() will be called for any behavior.
boolean	getStatelessHint(Component component) This method returns false if the behavior generates a callback url (for example ajax behaviors)
boolean	isEnabled(Component component) Called when a components is rendering and wants to render this behavior.
boolean	isTemporary() Specifies whether or not this behavior is temporary.
void	onComponentTag(Component component, ComponentTag tag) Called any time a component that has this behavior registered is rendering the component tag.
void	onException(Component component, java.lang.RuntimeException exception) In case an unexpected exception happened anywhere between onComponentTag() and rendered(), onException() will be called for any behavior.
void	onRendered(Component component) Called when a component that has this behavior coupled was rendered.
void	rendered(Component component) Deprecated. replaced by afterRender(Component)
void	renderHead(IHeaderResponse response) Render to the web response whatever the component wants to contribute to the head section.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractBehavior

public AbstractBehavior()

Construct.

Method Detail

beforeRender

public void beforeRender(Component component)

Description copied from interface: IBehavior

Called when a component is about to render.

Specified by:

beforeRender in interface IBehavior

Parameters:

component - the component that has this behavior coupled

See Also:

IBehavior.beforeRender(org.apache.wicket.Component)

bind

public void bind(Component component)

Description copied from interface: IBehavior

Bind this handler to the given component. This method is called by the host component immediately after this behavior is added to it. This method is useful if you need to do initialization based on the component it is attached and you can't wait to do it at render time. Keep in mind that if you decide to keep a reference to the host component, it is not thread safe anymore, and should thus only be used in situations where you do not reuse the behavior for multiple components.

Specified by:

bind in interface IBehavior

Parameters:

component - the component to bind to

See Also:

IBehavior.bind(org.apache.wicket.Component)

cleanup

public void cleanup()

This method is called either by onRendered(Component) or onException(Component, RuntimeException) AFTER they called their respective template methods. Override this template method to do any necessary cleanup.

detach

public void detach(Component component)

Description copied from interface: IBehavior

Allows the behavior to detach any state it has attached during request processing.

Specified by:

detach in interface IBehavior

Parameters:

component - the component that initiates the detachment of this behavior

See Also:

IBehavior.detach(Component)

exception

public final void exception(Component component,
                            java.lang.RuntimeException exception)

Description copied from interface: IBehavior

In case an unexpected exception happened anywhere between onComponentTag() and rendered(), onException() will be called for any behavior. Typically, if you clean up resources in IBehavior.afterRender(Component), you should do the same in the implementation of this method.

Specified by:

exception in interface IBehavior

Parameters:

component - the component that has a reference to this behavior and during which processing the exception occurred

exception - the unexpected exception

See Also:

IBehavior.exception(org.apache.wicket.Component, java.lang.RuntimeException)

getStatelessHint

public boolean getStatelessHint(Component component)

Description copied from interface: IBehavior

This method returns false if the behavior generates a callback url (for example ajax behaviors)

Specified by:

getStatelessHint in interface IBehavior

Parameters:

component - the component that has this behavior coupled.

Returns:

boolean true or false.

See Also:

IBehavior.getStatelessHint(org.apache.wicket.Component)

onComponentTag

public void onComponentTag(Component component,
                           ComponentTag tag)

Description copied from interface: IBehavior

Called any time a component that has this behavior registered is rendering the component tag.

Specified by:

onComponentTag in interface IBehavior

Parameters:

component - the component that renders this tag currently

tag - the tag that is rendered

See Also:

IBehavior.onComponentTag(org.apache.wicket.Component, org.apache.wicket.markup.ComponentTag)

onException

public void onException(Component component,
                        java.lang.RuntimeException exception)

In case an unexpected exception happened anywhere between onComponentTag() and rendered(), onException() will be called for any behavior.

Parameters:

component - the component that has a reference to this behavior and during which processing the exception occurred

exception - the unexpected exception

onRendered

public void onRendered(Component component)

Called when a component that has this behavior coupled was rendered.

Parameters:

component - the component that has this behavior coupled

afterRender

public final void afterRender(Component component)

Description copied from interface: IBehavior

Called when a component that has this behavior coupled was rendered.

Specified by:

afterRender in interface IBehavior

Parameters:

component - the component that has this behavior coupled

See Also:

IBehavior.afterRender(org.apache.wicket.Component)

renderHead

public void renderHead(IHeaderResponse response)

Description copied from interface: IHeaderContributor

Render to the web response whatever the component wants to contribute to the head section. TODO: Post 1.3, add component parameter, so that the behaviors dont' have to track component instances

Specified by:

renderHead in interface IHeaderContributor

Parameters:

response - Response object

See Also:

IHeaderContributor.renderHead(org.apache.wicket.markup.html.IHeaderResponse)

isEnabled

public boolean isEnabled(Component component)

Description copied from interface: IBehavior

Called when a components is rendering and wants to render this behavior. If false is returned this behavior will be ignored.

Specified by:

isEnabled in interface IBehavior

Parameters:

component - the component that has this behavior coupled

Returns:

true if this behavior must be executed/rendered

See Also:

IBehavior.isEnabled(Component)

isTemporary

public boolean isTemporary()

Description copied from interface: IBehavior

Specifies whether or not this behavior is temporary. Temporary behaviors are removed at the end of request. Such behaviors are useful for modifying component rendering only when it renders next. Usecases include javascript effects, initial clientside dom setup, etc.

Specified by:

isTemporary in interface IBehavior

Returns:

true if this behavior is temporary

See Also:

IBehavior.isTemporary()

detachModel

public final void detachModel(Component component)

Deprecated. replaced by detach(Component)

Parameters:

component -

rendered

public final void rendered(Component component)

Deprecated. replaced by afterRender(Component)

Parameters:

component -