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I'd like to know if it's possible to compose my own component (or call it Widget, Object).
I mean, instead of (for example) using h:panelGroup and a h:outputLabel inside it, make my own h:panelMarkzzz, as a composition of panelGroup and outputLabel.
Is it possible on JSF?
604
Yes, it's possible to create a composition of existing components like that.
Kickoff example:
/resources/foo/group.xhtml
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:cc="http://xmlns.jcp.org/jsf/composite">
<cc:interface>
<cc:attribute name="label" type="java.lang.String" required="true" />
</cc:interface>
<cc:implementation>
<h:panelGroup>
<h:outputLabel value="#{cc.attrs.label}" />
<cc:insertChildren />
</h:panelGroup>
</cc:implementation>
</html>
/test.xhtml
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:foo="http://xmlns.jcp.org/jsf/composite/foo">
<h:head>
<title>Test</title>
</h:head>
<h:body>
<foo:group label="Label value">
<h:outputText value="This will appear after label inside the panelgroup" />
</foo:group>
</h:body>
</html>
The /foo folder name is free to your taste and you can reference it in XML namespace as http://xmlns.jcp.org/jsf/composite/XXX. The XHTML filename is the tag name.
That said, composite components have performance implications and they should only be used when the functional requirement is not achievable using a simple include or tagfile. In your specific case, you'd better use a tagfile instead. A composite component is only worthy when you actually need it for the <cc:interface componentType="...">.
http://xmlns.jcp.org/jsf/composite tag documentation
86
Perhaps you mean Composite Components?
39
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