/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,

  * either express or implied. See the License for the specific language

  * governing permissions and limitations under the License.

  */

 package javax.faces.internal;

 import java.sql.ResultSet;

 import java.util.Collections;

 import java.util.List;

 import javax.faces.model.ArrayDataModel;

 import javax.faces.model.DataModel;

 import javax.faces.model.ListDataModel;

 import javax.faces.model.ResultDataModel;

 import javax.faces.model.ResultSetDataModel;

 import javax.faces.model.ScalarDataModel;

 import javax.servlet.jsp.jstl.sql.Result;

 /**

  * @author shot

  * 

  * This class might be changed without notice. Please do not use it

  * excluding the JSF specification part.

  */

 public class UIDataUtil {

     private UIDataUtil() {

     }

     public static DataModel getSuitableDataModel(Object obj) {

         DataModel model = null;

         if (obj == null) {

             model = new ListDataModel(Collections.EMPTY_LIST);

         } else if (obj instanceof DataModel) {

             model = (DataModel) obj;

         } else if (obj instanceof List) {

             model = new ListDataModel((List) obj);

         } else if (Object[].class.isAssignableFrom(obj.getClass())) {

             model = new ArrayDataModel((Object[]) obj);

         } else if (obj instanceof ResultSet) {

             model = new ResultSetDataModel((ResultSet) obj);

         } else if (obj instanceof Result) {

             model = new ResultDataModel((Result) obj);

         } else {

             model = new ScalarDataModel(obj);

         }

         return model;

     }

 }