org.apache.wicket.request.component

Interface IRequestableComponent

All Known Subinterfaces:

IRequestablePage

All Known Implementing Classes:

AbstractCheckSelector, AbstractChoice, AbstractErrorPage, AbstractItem, AbstractLink, AbstractOutputTransformerContainer, AbstractPageableView, AbstractRepeater, AbstractSingleSelectChoice, AbstractSubmitLink, AbstractTextComponent, AccessDeniedPage, AjaxButton, AjaxCheckBox, AjaxFallbackButton, AjaxFallbackLink, AjaxLink, AjaxPagingNavigation, AjaxPagingNavigationIncrementLink, AjaxPagingNavigationLink, AjaxPagingNavigator, AjaxSubmitLink, Audio, AutoLabelResolver.AutoLabel, AutoLinkResolver.AutolinkBookmarkablePageLink, BaseWicketTester.StartComponentInPage, Body, BookmarkablePageLink, Border, Border.BorderBodyContainer, BorderPanel, BrowserInfoForm, BrowserInfoPage, Button, Check, CheckBox, CheckBoxMultipleChoice, CheckboxMultipleChoiceSelector, CheckBoxSelector, CheckGroup, CheckGroupSelector, ClientSideImageMap, Component, ComponentFeedbackPanel, ContextImage, DataView, DataViewBase, DownloadLink, DropDownChoice, DummyHomePage, DummyHomePage.TestLink, DummyPanelPage, EmailTextField, EmptyPanel, Enclosure, EnclosureContainer, EnumLabel, ExceptionErrorPage, ExternalImage, ExternalLink, ExternalSource, FeedbackPanel, FencedFeedbackPanel, FileUploadField, Form, FormComponent, FormComponentFeedbackBorder, FormComponentFeedbackIndicator, FormComponentLabel, FormComponentPanel, Fragment, GenericPanel, GenericWebPage, GridView, HeaderPartContainer, HeaderResponseContainer, HiddenField, HtmlHeaderContainer, HtmlHeaderItemsContainer, Image, ImageButton, Include, InlineEnclosure, InlineFrame, InlineImage, InternalErrorPage, Item, Label, LabeledWebMarkupContainer, Link, ListChoice, ListItem, ListMultipleChoice, ListView, Loop, LoopItem, MarkupContainer, MediaComponent, MockHomePage, MultiFileUploadField, MultiLineLabel, NonCachingImage, NoopOutputTransformerContainer, NumberTextField, OddEvenItem, OddEvenListItem, Page, PageableListView, PageExpiredErrorPage, PageView, PagingNavigation, PagingNavigationIncrementLink, PagingNavigationLink, PagingNavigator, Panel, PasswordTextField, Picture, PopupCloseLink, PopupCloseLink.ClosePopupPage, PropertyListView, Radio, RadioChoice, RadioGroup, RangeTextField, RedirectPage, RefreshingView, RepeatingView, RequiredTextField, ResourceLink, SimpleFormComponentLabel, Source, Source, StatelessForm, StatelessLink, SubmitLink, TextArea, TextField, Track, TransparentWebMarkupContainer, UrlTextField, Video, WebComponent, WebMarkupContainer, WebPage, XsltOutputTransformerContainer

public interface IRequestableComponent

Base interface for components. The purpose of this interface is to make certain parts of Wicket easier to mock and unit test.

Author:

Matej Knopp

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canCallListenerInterfaceAfterExpiry()
void	detach() Detaches the component.
IRequestableComponent	get(String path) Gets the component at the given path.
Behavior	getBehaviorById(int id) Gets the behavior for the specified id
int	getBehaviorId(Behavior behavior) Gets a stable id for the specified behavior.
String	getId() Gets the id of this component.
IRequestablePage	getPage() Returns page this component belongs to.
String	getPageRelativePath() Gets this component's path.

Method Detail

getPageRelativePath

String getPageRelativePath()

Gets this component's path.

Returns:

Colon separated path to this component in the component hierarchy

getId

String getId()

Gets the id of this component.

Returns:

The id of this component

getPage

IRequestablePage getPage()
                         throws WicketRuntimeException

Returns page this component belongs to.

Returns:

The page holding this component

Throws:

WicketRuntimeException - Thrown if component is not yet attached to a Page.

get

IRequestableComponent get(String path)

Gets the component at the given path.

Parameters:

path - Path to component

Returns:

The component at the path

getBehaviorId

int getBehaviorId(Behavior behavior)

Gets a stable id for the specified behavior. The id remains stable from the point this method is first called for the behavior until the behavior has been removed from the component

Parameters:

behavior -

Returns:

a stable id for the specified behavior

getBehaviorById

Behavior getBehaviorById(int id)

Gets the behavior for the specified id

Parameters:

id -

Returns:

behavior or null if none

Throws:

InvalidBehaviorIdException - when behavior with this id cannot be found

detach

void detach()

Detaches the component.

NOTE: this method is not inherited from IDetachable on purpose. in Wicket the assumption for a long time has been that Components do not implement IDetachable; doing so may lead to some very nasty side-effects. Consider AbstractPropertyModel#detach() which looks like this:

 public void detach()
 {
        // Detach nested object if it's a detachable
        if (target instanceof IDetachable)
        {
                ((IDetachable)target).detach();
        }
 }
 

If the model was constructed thusly, which is quite common: new PropertyModel(this, "person") and Component implemented IDetachable then calling @{code model.detach()} will cause an infinite loop with the model trying to detach the component and the component trying to detach the model.

canCallListenerInterfaceAfterExpiry

boolean canCallListenerInterfaceAfterExpiry()

Returns:

true if it is save to call the listener interface on this component when the owner page is freshly created after expiration