How to target a commandLink nested inside an ui:repeat, in a composite component?
Question
I'm trying to create a paginator composite component. The component should render a commandLink for each available page. It looks something like this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:ui="http://java.sun.com/jsf/facelets">
<cc:interface>
<cc:attribute name="action" targets="jumpButton" required="true"/>
<cc:attribute name="bean" type="java.lang.Object" required="true"/>
</cc:interface>
<cc:implementation>
<ui:repeat value="#{cc.attrs.bean.pages}" var="page">
<h:commandLink id="jumpButton"
actionListener="#{cc.attrs.bean.jumpToPage(page)}">
<h:outputText value="#{page}"/>
</h:commandLink>
</ui:repeat>
</cc:implementation>
</html>
The component is used in various pages like this:
<ccc:paginator bean="#{myBean}"
action="/index?faces-redirect=true&includeViewParams=true"/>
Or:
<ccc:paginator bean="#{myOtherBean}"
action="/dir/index?faces-redirect=true&includeViewParams=true"/>
Notice the use of faces-redirect=true and includeViewParams=true, which as far as I know cannot be used directly on the commandLinks in the composite component.
The problem is that jumpButton cannot be target because it is inside an ui:repeat. I get the message:
javax.servlet.ServletException: /index?faces-redirect=true&includeViewParams=true : Unable to re-target MethodExpression as inner component referenced by target id 'jumpButton' cannot be found.
If I create a command link with id="jumpButton" outside the ui:repeat, the composite component and button works fine. How can I make my composite component work with the command link inside the ui:repeat?
Solution
The managed bean's jumpToPage action:
public String jumpToPage(String path, Integer page) {
...
setCurrentPage(page);
return path;
}
The composite component:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:ui="http://java.sun.com/jsf/facelets">
<cc:interface>
<cc:attribute name="bean" type="java.lang.Object" required="true"/>
<cc:attribute name="path" type="java.lang.String" required="true"/>
</cc:interface>
<cc:implementation>
<ui:repeat value="#{cc.attrs.bean.pages}" var="page">
<h:commandLink id="jumpButton"
action="#{cc.attrs.bean.jumpToPage(cc.attrs.path, page)}">
<h:outputText value="#{page}"/>
</h:commandLink>
</ui:repeat>
</cc:implementation>
</html>
Component usage examples:
<ccc:paginator bean="#{myBean}"
path="/index?faces-redirect=true&includeViewParams=true"/>
<ccc:paginator bean="#{myOtherBean}"
path="/dir/index?faces-redirect=true&includeViewParams=true"/>
1 answers
solution1
2 ACCPTED 2013-08-20 20:56:51
You should remove the action attribute within <cc:interface> . It is not needed since you invoke the action via the bean attribute.
Update 1
And the outcome of the action you can also define as return value of your bean. Like this:
public class MyBean {
public String jumpToPage(int page){
// ...
return "/index?faces-redirect=true&includeViewParams=true";
}
}
And then use action instead of actionListener :
<h:commandLink id="jumpButton" action="#{cc.attrs.bean.jumpToPage(page)}">
<h:outputText value="#{page}"/>
</h:commandLink>
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