/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.model;
  
  import java.util.SortedMap;
  
  import javax.servlet.jsp.jstl.sql.Result;
  
  //import javax.servlet.jsp.
  /**
   * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
   */
  public class ResultDataModel extends DataModel<SortedMap<String, Object>>
  {
      // FIELDS
      private int _rowIndex = -1;
      private Result _data;
  
      // CONSTRUCTORS
      public ResultDataModel()
      {
          super();
      }
  
      public ResultDataModel(Result result)
      {
          if (result == null)
          {
              throw new NullPointerException("result");
          }
          setWrappedData(result);
      }
  
      // METHODS
      @Override
      public int getRowCount()
      {
          if (getRows() == null)
          {
              return -1;
          }
          return getRows().length;
      }
  
      @Override
      public SortedMap<String, Object> getRowData()
      {
          if (getRows() == null)
          {
              return null;
          }
          if (!isRowAvailable())
          {
              throw new IllegalArgumentException("row is unavailable");
          }
          return getRows()[_rowIndex];
      }
  
      @Override
      public int getRowIndex()
      {
          return _rowIndex;
      }
  
      @Override
      public Object getWrappedData()
      {
          return _data;
      }
  
      @Override
      public boolean isRowAvailable()
      {
          return getRows() != null && _rowIndex >= 0 && _rowIndex < getRows().length;
      }
  
      @Override
      public void setRowIndex(int rowIndex)
      {
          if (rowIndex < -1)
          {
              throw new IllegalArgumentException("illegal rowIndex " + rowIndex);
          }
         int oldRowIndex = _rowIndex;
         _rowIndex = rowIndex;
         if (getRows() != null && oldRowIndex != _rowIndex)
         {
             SortedMap<String, Object> data = isRowAvailable() ? getRowData() : null;
             DataModelEvent event = new DataModelEvent(this, _rowIndex, data);
             DataModelListener[] listeners = getDataModelListeners();
             for (int i = 0; i < listeners.length; i++)
             {
                 listeners[i].rowSelected(event);
             }
         }
     }
 
     private SortedMap<String, Object>[] getRows()
     {
         if (_data == null)
         {
             return null;
         }
 
         return _data.getRows();
     }
 
     @Override
     public void setWrappedData(Object data)
     {
         if (data == null)
         {
             setRowIndex(-1);
             _data = null;
         }
         else
         {
             _data = ((Result)data);
             _rowIndex = -1;
             setRowIndex(0);
         }
     }
 
 }