Java – Jsf RichFaces autocomplete : get the InputValue for autocomplete- method()

autocompletejakarta-eejavajsfrichfaces

Part of my xhmtl-Page:

<rich:autocomplete autocompleteMethod="#{autocompletMit.searchbyName()}" mode="cachedAjax" 
                           fetchValue="#{controller.mitarbeiter.mitarbeiterName}" autocompleteList="#{autocompletMit.autocompleteList}" minChars="1" autofill="true" var="it" > 
    <h:outputText value="#{it.mitarbeiterName}" style="font-weight:bold"/>  
    </rich:autocomplete>

Bean for my Autocomplete:

@ManagedBean(name = "autocompletMit")
@RequestScoped
public class AutoCompleteMitarbeiter implements Serializable {

    @EJB
    private Transaktionssteuerung transakt;
    private List<String> autocompleteList = new ArrayList<String>();
    String nameSearch;

    public List<String> searchbyName(Object o) {
        String test = (String) o;  
        List<Mitarbeiter> alleMitarbeiter = transakt.alleMitarbeiter();
        for (Iterator<Mitarbeiter> it = alleMitarbeiter.iterator(); it.hasNext();) {
            if (it.next().getMitarbeiterName().startsWith(test)) {
                autocompleteList.add(it.next().getMitarbeiterName());
            }
        }
            return autocompleteList;
     }
//getter & setter
  }

I always get "Unkown property searchbyName" in my .xhtml for autocompleteMethod="#{autocompletMit.searchbyName()}" because he excepts a value… Which value do i have to submit here?!?

Best Answer

autocompleteMethod="#{autocompletMit.searchbyName()}"

This is not correct when you've a method which takes arguments. Remove those parentheses. The RichFaces <rich:autocomplete> showcase example also doesn't show at all that you should be invoking an argumentless method.

Method not found: Controller.AutoCompleteMitarbeiter@7a88716.searchbyName (java.lang.String)

It's telling that it expected a searchbyName method taking a String argument. Yours takes an Object argument. This does not match. Fix it accordingly:

public List<String> searchbyName(String query) {

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for (Iterator<String> i = someIterable.iterator(); i.hasNext();) {
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    System.out.println(item);
}

Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idiom, since the actual iterator is merely inferred.

As was noted by Denis Bueno, this code works for any object that implements the Iterable interface.

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Java – How to invoke a Java method when given the method name as a string

Coding from the hip, it would be something like:

java.lang.reflect.Method method;
try {
  method = obj.getClass().getMethod(methodName, param1.class, param2.class, ..);
} catch (SecurityException e) { ... }
  catch (NoSuchMethodException e) { ... }

The parameters identify the very specific method you need (if there are several overloaded available, if the method has no arguments, only give methodName).

Then you invoke that method by calling

try {
  method.invoke(obj, arg1, arg2,...);
} catch (IllegalArgumentException e) { ... }
  catch (IllegalAccessException e) { ... }
  catch (InvocationTargetException e) { ... }

Again, leave out the arguments in .invoke, if you don't have any. But yeah. Read about Java Reflection

Best Answer

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