Package org.apache.wicket.markup.head.filter

Class JavaScriptDeferHeaderResponse

java.lang.Object

org.apache.wicket.markup.html.DecoratingHeaderResponse

org.apache.wicket.markup.head.filter.JavaScriptDeferHeaderResponse

All Implemented Interfaces:

Closeable, AutoCloseable, IHeaderResponse

public class JavaScriptDeferHeaderResponse
extends DecoratingHeaderResponse

A header response which defers all AbstractJavaScriptReferenceHeaderItems.

To prevent any error because of possible dependencies to referenced JavaScript files *all* JavaScriptHeaderItems are replaced with suitable implementations that delay any execution until all deferred AbstractJavaScriptReferenceHeaderItems have been loaded.

Note: This solution depends on the execution order of JavaScript in the browser: The 'DOMContentLoaded' event has to be fired after all deferred JavaScript resources have been loaded. This doesn't seem to be the case in all browsers, thus this class should be considered experimental.

Author:

svenmeier +

Constructor Summary

Constructors

Constructor	Description
JavaScriptDeferHeaderResponse(IHeaderResponse response)	Decorate the given response.

Method Summary

Modifier and Type	Method	Description
void	render(HeaderItem item)	Renders the given HeaderItem to the response if none of its tokens has been rendered before.

Methods inherited from class org.apache.wicket.markup.html.DecoratingHeaderResponse

close, getRealResponse, getResponse, isClosed, markRendered, wasRendered

Methods inherited from class java.lang.Object

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

Constructor Details

JavaScriptDeferHeaderResponse

public JavaScriptDeferHeaderResponse(IHeaderResponse response)

Decorate the given response.

Parameters:

response -

Method Details

render

public void render(HeaderItem item)

Description copied from interface: IHeaderResponse

Renders the given HeaderItem to the response if none of its tokens has been rendered before.

Automatically marks all item's tokens as rendered.

Specified by:

render in interface IHeaderResponse

Overrides:

render in class DecoratingHeaderResponse

Parameters:

item - The item to render.

See Also:

• IHeaderResponse.markRendered(Object)