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    <p>Use <a href="http://download.oracle.com/javaee/6/api/javax/el/ValueExpression.html#setValue%28javax.el.ELContext,%20java.lang.Object%29" rel="nofollow noreferrer"><code>ValueExpression#setValue()</code></a>.</p> <pre><code>FacesContext facesContext = FacesContext.getCurrentInstance(); ELContext elContext = facesContext.getELContext(); ValueExpression valueExpression = facesContext.getApplication().getExpressionFactory() .createValueExpression(elContext, "#{cc.attrs.model.location}", Location.class); valueExpression.setValue(elContext, newLocation); </code></pre> <p>The <a href="http://download.oracle.com/javaee/6/api/javax/faces/application/Application.html#evaluateExpressionGet%28javax.faces.context.FacesContext,%20java.lang.String,%20java.lang.Class%29" rel="nofollow noreferrer"><code>Application#evaluateExpressionGet()</code></a> by the way calls <a href="http://download.oracle.com/javaee/6/api/javax/el/ValueExpression.html#getValue%28javax.el.ELContext%29" rel="nofollow noreferrer"><code>ValueExpression#getValue()</code></a> under the covers, exactly as described by its <a href="http://download.oracle.com/javaee/6/api/javax/faces/application/Application.html#evaluateExpressionGet%28javax.faces.context.FacesContext,%20java.lang.String,%20java.lang.Class%29" rel="nofollow noreferrer">javadoc</a> (if you have ever read it...)</p> <hr> <p><strong>Unrelated</strong> to the concrete problem, are you aware about the possibility to create backing <code>UIComponent</code> class for the composite component? I bet that this is much easier than fiddling with <code>ValueExpression</code>s this way. You could then just use the inherited <code>getAttributes()</code> method to get the <code>model</code>.</p> <pre><code>Model model = (Model) getAttributes().get("model); // ... </code></pre> <p>You can find an example in our <a href="https://stackoverflow.com/tags/composite-component/info">composite component wiki page</a>.</p>
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    1. POHow does a composite component set a property in it's client's backing bean?
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    1. COYou are talking about using the @FacesComponent anotation, right? I had posted another question on this topic with a composite-component tag and I guess this answers that question.
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    2. COYes, that's right. See also the linked wiki. I haven't seen your other question. Pay attention to proper tagging. Folks here usually browse by (interesting) tags.
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