Adding an attribute to primefaces by extending commandButton component - jsf

Question

Primefaces 8
Java 11
I would like to add a controller attribute to a commandButton which takes in page bean instance as value . I can then use this page bean in command button renderer to disable the button by calling method on page bean.
Component Bean class
#FacesComponent(CustomCommandButton.COMPONENT_TYPE)
public class CustomCommandButton extends CommandButton
{
private static final Logger logger = Logger.getInstance(CustomCommandButton.class);
public static final String COMPONENT_FAMILY = "com.xxx.faces.component";
public static final String COMPONENT_TYPE = "com.xxx.faces.component.CustomCommandButton";
private enum PropertyKeys {
controller
}
private IpmsBean controller;
#Override
public String getFamily() {
return COMPONENT_FAMILY;
}
#Override
public String getRendererType() {
return CustomCommandButtonRenderer.RENDERER_TYPE;
}
public CustomCommandButton()
{
super();
}
public void setController(IpmsBean bean)
{
getStateHelper().put(PropertyKeys.controller, bean);
this.controller=bean;
}
public IpmsBean getController()
{
return (IpmsBean) getStateHelper().eval(PropertyKeys.controller, null);
}
}
Renderer class which doesn't have whole lot just yet:
#FacesRenderer(
componentFamily=CustomCommandButton.COMPONENT_FAMILY,
rendererType=CustomCommandButtonRenderer.RENDERER_TYPE
)
public class CustomCommandButtonRenderer extends CommandButtonRenderer {
public static final String RENDERER_TYPE = "com.xxx.faces.component.CustomCommandButtonRenderer";
#Override
public void encodeEnd(FacesContext context, UIComponent component)
throws java.io.IOException {
//plan is to disable button after asking pagebean
//if (component.getController().shouldDisable())
// component.setDisabled("true");
//
super.encodeEnd(context, component);
}
}
taglibs-faces.xml
<?xml version="1.0"?>
<facelet-taglib version="2.0"
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"
id="lu">
<namespace>http://com.xxx.faces/ui</namespace>
<tag>
<tag-name>customCommandButton</tag-name>
<component>
<component-type>com.xxx.faces.component.CustomCommandButton</component-type>
<renderer-type>com.xxx.faces.component.CustomCommandButtonRenderer</renderer-type>
</component>
<attribute>
<description>
<![CDATA[Any instance of IpmsBean.]]>
</description>
<name>controller</name>
<required>false</required>
<type>com.xxx.xxxx.client.jsf.bean.IpmsBean</type>
</attribute>
...copied rest of commandbutton's attributes here...
</tag>
</facelet-taglib>
xhtml page:
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core"
xmlns:p="http://primefaces.org/ui"
template="/resources/layout/masterLayout.xhtml"
xmlns:c="http://xmlns.jcp.org/jsf/core"
xmlns:incl="http://java.sun.com/jsf/composite/includes"
xmlns:lu="http://com.xxx.faces/ui">
<lu:customCommandButton
value="Custom Button"
controller="#{regionPolicyBean}"
oncomplete="hello()"/>
....
</ui:composition>
"Custom Button" shows up just fine. But setController(bean) method is not valled. setOnComplete() method is called. Not sure what am I missing here.
I did refer to this answer Adding Custom Attributes to Primefaces Autocomplete Component in JSF but still not sure why setter is not being called.

Answer 1

Not a direct answer, but I don't see why you do this the hard way. You can simply do:
<p:commandButton ...>
<f:attribute name="controller" value="#{...}"/>
</p:commandButton>
and get controller from the component's attributes map.