Is it possible to create a custom JSF core Facelet component. Something like <custom:composition> of <ui:composition>, or <custom:include> for <ui:include> It would be helpful if someone can tell me the steps involved.
Thanks in advance,
Kaushal
It are in essence taghandlers. I.e. classes extending from TagHandler.
Here's a Hello World taghandler.
com.example.HelloTagHandler
public class HelloTagHandler extends TagHandler { public HelloTagHandler(TagConfig config) { super(config); } @Override public void apply(FaceletContext context, UIComponent parent) throws IOException { // Do your job here. This example dynamically adds another component to the parent. if (ComponentHandler.isNew(parent)) { UIOutput child = new HtmlOutputText(); child.setValue("Hello World"); parent.getChildren().add(child); } nextHandler.apply(context, parent); // Delegate job further to first next tag in tree hierarchy. } } /WEB-INF/my.taglib.xml
<?xml version="1.0" encoding="UTF-8"?> <facelet-taglib xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facelettaglibrary_2_0.xsd" version="2.0" > <namespace>http://example.com/my</namespace> <tag> <tag-name>hello</tag-name> <handler-class>com.example.HelloTagHandler</handler-class> </tag> </facelet-taglib> /WEB-INF/web.xml (note: this part is not mandatory when my.taglib.xml is in /META-INF folder of a JAR file inside /WEB-INF/lib like as with JSF component libraries):
<context-param> <param-name>javax.faces.FACELETS_LIBRARIES</param-name> <param-value>/WEB-INF/my.taglib.xml</param-value> </context-param> Usage in /some.xhtml
<html ... xmlns:my="http://example.com/my"> ... <my:hello /> To see the source code of Mojarra implementation of <ui:composition> and <ui:include>, click the links.
