org.apache.tapestry5.services

Interface ComponentSource

All Known Implementing Classes:

ComponentSourceImpl

public interface ComponentSource

Used by classes that need to retrieve a component by its complete id, or a page by its logical page name or root component class. The complete id is the logical name of the containing page, a colon, and the nested component id. It may also just be the page name (for the root component of a page).

Method Summary

Methods

Modifier and Type	Method and Description
Component	getActivePage() Returns the active page, as defined by RequestGlobals.getActivePageName().
Component	getComponent(String completeId) Gets a component by its complete id.
Component	getPage(Class pageClass) A convienience for obtaining a page instance via a class instance.
Component	getPage(String pageName) Returns the page identified by its logical page name.

Method Detail

getComponent

Component getComponent(String completeId)

Gets a component by its complete id. If the component id is for a mixin, then the mixin attached to the component will be returned. A mixin's complete id is its container's complete id, suffixed with "$" and the mixin's id (its simple class name).

Parameters:

completeId - complete component id (case insensitive)

Returns:

the component

Throws:

IllegalArgumentException - if the component can not be found

See Also:

ComponentResourcesCommon.getCompleteId()

getPage

Component getPage(String pageName)

Returns the page identified by its logical page name. A logical page name is the short form of a page name often emebedded into URLs.

Parameters:

pageName - the logical page name

Returns:

the corresponding page's root component

Throws:

IllegalArgumentException - if the page can not be found

getPage

Component getPage(Class pageClass)

A convienience for obtaining a page instance via a class instance. This is provided so as to be refactoring safe. The pageClass is simply converted to a class name and this is used to locate a page instance.

Parameters:

pageClass - used to locate the page instance

Returns:

the page instance

getActivePage

Component getActivePage()

Returns the active page, as defined by RequestGlobals.getActivePageName(). This is the primary page for handling the current request, the page which will be activated for the request. The identity of the active page is not known until the correct Dispatcher determines this.

Returns:

the active page, or null if no active page is yet identified

Since:

5.2.0