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POJSF Templating: f:event works, f:viewParam doesn't
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  1. POJSF Templating: f:event works, f:viewParam doesn't
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    copied!<p>Following the example of <a href="http://docs.oracle.com/javaee/6/javaserverfaces/2.1/docs/vdldocs/facelets/f/metadata.html" rel="nofollow">the spec</a>, I have a template and a template client.</p> <p><strong>default.xhtml (template):</strong></p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets"&gt; &lt;h:head&gt; &lt;title&gt;...&lt;/title&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt; &lt;h:outputStylesheet name="css/screen.css" /&gt; &lt;/h:head&gt; &lt;h:body&gt; &lt;f:view&gt; &lt;ui:insert name="metadata" /&gt; &lt;div id="container"&gt; &lt;div id="header"&gt; &lt;img src="resources/gfx/logo.png" /&gt; &lt;/div&gt; &lt;div id="content"&gt; &lt;ui:insert name="content" /&gt; &lt;/div&gt; &lt;div id="footer"&gt; &lt;p&gt; This is a project.&lt;br /&gt; &lt;/p&gt; &lt;/div&gt; &lt;/div&gt; &lt;/f:view&gt; &lt;/h:body&gt; &lt;/html&gt; </code></pre> <p><strong>edit.xhtml (template client):</strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets" template="/WEB-INF/templates/default.xhtml"&gt; &lt;ui:define name="metadata"&gt; &lt;f:metadata&gt; &lt;f:viewParam name="id" value="#{myBean.id}" /&gt; &lt;f:event type="preRenderView" listener="#{myBean.init}"/&gt; &lt;/f:metadata&gt; &lt;/ui:define&gt; &lt;ui:define name="content"&gt; ... &lt;/ui:define&gt; &lt;/ui:composition&gt; </code></pre> <p><strong>list.xhtml (the caller of the edit view) contains:</strong></p> <pre><code>&lt;h:commandLink action="edit" value="#{msgs.edit}"&gt; &lt;f:param name="id" value="#{myentity.id}" /&gt; &lt;/h:commandLink&gt; </code></pre> <p>The f:event gets called, but the id (viewParam) is not assigned to the bean. The id is however present in the request parameter map and can be retrieved like this:</p> <pre><code>FacesContext ctx = FacesContext.getCurrentInstance(); Map&lt;String, String&gt; parameters = ctx.getExternalContext().getRequestParameterMap(); if (parameters.containsKey("id")) { this.id = Long.valueOf(parameters.get("id")); } </code></pre> <p>But that's what <code>&lt;f:viewParam ...&gt;</code> should take care of (as far as I understood).</p> <p>What might be wrong?</p>
 

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