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POJSF2: limiting cc:attribute to a given object type within a List
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  1. POJSF2: limiting cc:attribute to a given object type within a List
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    copied!<p>If I had a managed bean as follows:</p> <pre><code>@ManagedBean @RequestSchoped public class Example { private List&lt;String&gt; stringList; private List&lt;Long&gt; longList; // getters, setters, etc. down here } </code></pre> <p>and had a custom component which accepted a List as an attribute:</p> <pre><code>&lt;?xml version='1.0' encoding='UTF-8' ?&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:cc="http://java.sun.com/jsf/composite" xmlns:h="http://java.sun.com/jsf/html"&gt; &lt;!-- INTERFACE --&gt; &lt;cc:interface&gt; &lt;cc:attribute name="aList" type="java.util.List" /&gt; &lt;/cc:interface&gt; &lt;cc:implementation&gt; &lt;!-- code is in here --&gt; &lt;/cc:implementation&gt; &lt;/html&gt; </code></pre> <p>How could I make sure that this worked:</p> <pre><code>&lt;myComp:previousComponent aList="#{example.stringList}" /&gt; </code></pre> <p>but this didn't:</p> <pre><code>&lt;myComp:previousComponent aList="#{example.longList}" /&gt; </code></pre> <p>In other words, what I want to do for the <code>cc:attribute</code> is as follows:</p> <pre><code>&lt;cc:attribute name="aList" type="java.util.List&lt;java.lang.String&gt;" /&gt; </code></pre> <p>However, as we know xhtml doesn't take kindly to using &gt; or &lt;. Also, with Generics only being checked at compile time, I'm not sure how this would be done. Does anyone know if this is possible?</p>
 

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