How to Implement Auto Suggestion using ADF ?

How to Implement Auto Suggestion using ADF ?





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    public List onSuggest(String string) {

       

        BindingContext bctx = BindingContext.getCurrent();

        BindingContainer bindings = bctx.getCurrentBindingsEntry();

       

        //set the bind variable value that is used to filter the View Object

        //query of the suggest list. The View Object instance has a View

        //Criteria assigned

       

        OperationBinding setVariable = (OperationBinding) bindings.get("setSearchCriteria");

        setVariable.getParamsMap().put("value", string);

        setVariable.execute();    

       

        //the data in the suggest list is queried by a tree binding.

       

        JUCtrlHierBinding hierBinding = (JUCtrlHierBinding) bindings.get("CountriesLookup1");     

        //re-query the list based on the new bind variable values

        hierBinding.executeQuery();

       

        //The rangeSet, the list of queries entries, is of type

        //JUCtrlValueBndingRef.

        List displayDataList = hierBinding.getRangeSet();     
       
        ArrayList selectItems = new ArrayList();
       
        for (JUCtrlValueBindingRef displayData : displayDataList){
          Row rw = displayData.getRow();
          selectItems.add(new SelectItem((String)rw.getAttribute("LocName"),(String)rw.getAttribute("LocName")));
        }
       
        return selectItems;
    } 

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Create a Read Only VO CountriesLookup.

Query : SELECT distinct(loc_name) FROM country.
Bind Variable :     Name="SearchCriteria"
    Kind="viewcriteria"
    Type="java.lang.String"/>

View Criteria :
    Name="CountriesLookupCriteria"
    ViewObjectName="neelmani.model.queries.CountriesLookup"
    Conjunction="AND">
   
     
                  Name="displayOperators"
          Value="InAdvancedMode"/>
                  Name="autoExecute"
          Value="false"/>
                  Name="allowConjunctionOverride"
          Value="true"/>
                  Name="showInList"
          Value="true"/>
                  Name="mode"
          Value="Basic"/>
     
   
          Name="vcrow39"
      UpperColumns="1">
              Name="CountriesLookupCriteria_vcrow39_LocName"
        ViewAttribute="LocName"
        Operator="STARTSWITH"
        Conjunction="AND"
        Value=":SearchCriteria"
        IsBindVarValue="true"
        Required="Optional"/>
   
 

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Put the bellow code in CountriesLookupImpl.(countriedLookup View Object)

    /**
     * Returns the variable value for SearchCriteria.
     * @return variable value for SearchCriteria
     */

    public String getSearchCriteria() {

        return (String)ensureVariableManager().getVariableValue("SearchCriteria");

    }

    /**
     * Sets value for variable SearchCriteria.
     * @param value value to bind as SearchCriteria
     */
    public void setSearchCriteria(String value) {

        ensureVariableManager().setVariableValue("SearchCriteria", value);

    }

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Select and sattle right the  setSearchCriteria from Client Interface of View Object.