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POReuse a facelet in multiple beans
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  1. POReuse a facelet in multiple beans
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    copied!<p>How do I invoke/access a property of a managed bean when the bean name is known, but is not yet constructed?</p> <p>For example: </p> <pre><code>&lt;p:selectOneMenu value="#{eval.evaluateAsBean(bean).text}" &gt; &lt;f:selectItems value="#{eval.evaluateAsBean(bean).values}" var="val" itemLabel="#{val}" itemValue="#{val}" /&gt; &lt;/p:selectOneMenu&gt; </code></pre> <p>If there is a managed bean called testBean and in my view <em>bean</em> has the <code>"testBean"</code>value, I want the <em>text</em> or <em>values</em> property of testBean to be called.</p> <p><strong>EDIT1</strong></p> <p><strong>The context</strong></p> <p>An object consists of a list of properties(values). One property is modified with a custom JSF editor, depending on its type.</p> <p>The list of editors is determined from the object's type, and displayed in a form using <code>custom:include</code> tags. This custom tag is used to dynamically include the editors <code>&lt;custom:include src="#{editor.component}"&gt;</code>. The <em>component</em> property points to the location of the JSF editor. </p> <p>In my example some editors(rendered as select boxes) will use the same facelet(dynamicDropdown.xhtml). Every editor has a session scoped managed bean. I want to reuse the same facelet with multiple beans and to pass the name of the bean to dynamicDropdown.xhtml using the <em>bean</em> param.</p> <p><code>genericAccount.xhtml</code></p> <pre><code>&lt;p:dataTable value="#{group.editors}" var="editor"&gt; &lt;p:column headerText="Key"&gt; &lt;h:outputText value="#{editor.name}" /&gt; &lt;/p:column&gt; &lt;p:column headerText="Value"&gt; &lt;h:panelGroup rendered="#{not editor.href}"&gt; &lt;h:outputText value="#{editor.component}" escape="false" /&gt; &lt;/h:panelGroup&gt; &lt;h:panelGroup rendered="#{editor.href}"&gt; &lt;custom:include src="#{editor.component}"&gt; &lt;ui:param name="bean" value="#{editor.bean}"/&gt; &lt;custom:include&gt; &lt;/h:panelGroup&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; </code></pre> <p><code>#{editor.component}</code> refers to a dynamicDropdown.xhtml file.</p> <p><code>dynamicDropdown.xhtml</code></p> <pre><code>&lt;ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.prime.com.tr/ui"&gt; &lt;p:selectOneMenu value="#{eval.evaluateAsBean(bean).text}" &gt; &lt;f:selectItems value="#{eval.evaluateAsBean(bean).values}" var="val" itemLabel="#{val}" itemValue="#{val}" /&gt; &lt;/p:selectOneMenu&gt; &lt;/ui:composition&gt; </code></pre> <p><code>eval</code> is a managed bean:</p> <pre><code>@ManagedBean(name = "eval") @ApplicationScoped public class ELEvaluator { ... public Object evaluateAsBean(String el) { FacesContext context = FacesContext.getCurrentInstance(); Object bean = context.getELContext() .getELResolver().getValue(context.getELContext(), null, el); return bean; } ... } </code></pre>
 

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