Menu
Is there such a thing as inheritance in JSF 2 composite components?
As far as I know, there isn't. I'm just making sure.
Thanks!
760
Inheritance of composite components is not possible afaik. What we did to avoid code duplication is to decorate the implementation of a JSF2 composite component.
The stuff shared by all input fields of our application is provided within a decorator template like this:
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:cu="http://mytags.de/jsftags">
<!-- provides a common set of layout information for inputfields -->
<ui:param name ="fieldStyle" value="#{propertiesController.get('FIELD_STYLE', cc.attrs.name)}" />
<h:panelGroup id="basicInputField" styleClass="basicInputField" layout="block" style="width: #{cc.attrs.width}; height: #{cc.attrs.height};">
<ui:insert name="component">
no component given...
</ui:insert>
</h:panelGroup>
</ui:composition>
And the composite component uses the template to decorate itself:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:cu="http://mytags.de/jsftags">
<cc:interface>
<cc:attribute name="name" required="true" />
<cc:attribute name="width" required="false" default="auto" />
<cc:attribute name="height" required="false" default="auto" />
<cc:attribute name="inset" required="false" default="0px" />
</cc:interface>
<cc:implementation>
<ui:decorate template="basicInputField.xhtml">
<ui:define name="component">
<h:inputText id="inputText" style="#{fieldStyle} width: 100%;" value="#{levelContent.test}" />
</ui:define>
</ui:decorate>
</cc:implementation>
</html>
This way we only need to change the decorator template, when the way we fetch field properties (i.e. readonly, required, style,...) changes.
170
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
