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11712118
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2012-07-29T19:09:43.350
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2012-07-29T19:09:43.350
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Your problem is the way value binding is done in JSF. The prefered way is to retrieve the EL Expression an attribute was populated with by invoking <code>getValueExpression("attributeName")</code>. Then this EL Expression can be used to get or set the value in the backing bean. As your not passing <code>#{!isButtonEnabled}</code> but <code>#{cc.attrs.disabled}</code> to <code>ice:commandButton</code> the binding fails. I solved this for the <code>p:selectOneMenu</code> component of Primefaces by writing a wrapping <code>UIComponent</code> which defines a property <code>wrappedValue</code> and passed that property to the <code>p:selectOneMenu</code>. In the getter and setter of that property I then used <code>getValueExpression</code> to retieve the real EL Expression for the attribute. <pre><code><composite:interface componentType="de.gw2tome.component.valuewrapper"> <composite:attribute name="value" type="de.gw2tome.models.Rarity" required="true" /> </composite:interface> <composite:implementation> <p:selectOneMenu value="#{cc.wrappedValue}"/> ... </composite:implementation> </code></pre> <hr> <pre><code>@FacesComponent("de.gw2tome.component.valuewrapper") public class ValueWrapper extends UINamingContainer { public void setWrappedValue(Object wrappedValue) { ValueExpression expr = getValueExpression("value"); ELContext ctx = getFacesContext().getELContext(); expr.setValue(ctx, wrappedValue); } public Object getWrappedValue() { ValueExpression expr = getValueExpression("value"); ELContext ctx = getFacesContext().getELContext(); return expr.getValue(ctx); } } </code></pre> The component can now be used the following way: <pre><code><g:rarityChooser value="#{itemSearchBean.minRarity}" /> </code></pre>
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1. USSebastian Hoffmann
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