richfaces - Create MethodExpression in Java (and use in JSF) -

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• use <ui:param> in listener tag <p:ajax> 1 answer

i've been trying "generic" dialog, autocomplete functionality, work few days now. turns out, creating methodexpression "wrong way". thought i'd document here.

to reiterate: want dynamically create methodexpression, store in property , use in jstl template or jsf page.

for example:

// template <c:foreach items="#{property.subitems}" var="subitem">   <ui:include src="editor.xhtml">     <ui:param name="autocompletemethod" value="#{subitem.autocompmethod}" />   </ui:include> </c:foreach>  // editor.xhtml // we're using richfaces (unfortunately), example <rich:autocomplete mode="cachedajax" minchars="2"       autocompletemethod="#{autocompletemethod}" /> 

i've found solution @ http://javaevangelist.blogspot.co.at/2012/10/jsf-2x-tip-of-day-programmatically_20.html

public static methodexpression createmethodexpression(string methodexpression, class<?> expectedreturntype, class<?>[] expectedparamtypes) {     facescontext context = facescontext.getcurrentinstance();     return context.getapplication().getexpressionfactory()             .createmethodexpression(context.getelcontext(), methodexpression, expectedreturntype, expectedparamtypes); } 

you can create methodexpression , store in property. richfaces autocomplete, signature is: list<string> autocomplete(string prefix)

@suppresswarnings("rawtypes") // generics use type erasure class<list> rettype = list.class; class<?>[] paramtypes = {string.class}; methodexpression autocompletemethod = createmethodexpression("#{mybean.myautocomplete}", rettype, paramtypes); // in questions example, we'd need set property here: this.autocompmethod = autocompletemethod; 

then have apropriate getter:

methodexpression getautocompmethod() {     return this.autocompmethod; }