/*
    * 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 javax.servlet.jsp.jstl.sql.Result;
  import java.util.SortedMap;
  
  /**
   * see Javadoc of <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a>
   *
   * @author Thomas Spiegl (latest modification by $Author: skitching $)
   * @version $Revision: 676278 $ $Date: 2008-07-13 03:35:04 -0500 (Sun, 13 Jul 2008) $
   */
  public class ResultDataModel extends DataModel
  {
      // 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
      public int getRowCount()
      {
          if (getRows() == null)
          {
              return -1;
          }
          return getRows().length;
      }
  
      public Object getRowData()
      {
          if (getRows() == null)
          {
              return null;
          }
          if (!isRowAvailable())
          {
              throw new IllegalArgumentException("row is unavailable");
          }
          return getRows()[_rowIndex];
      }
  
      public int getRowIndex()
      {
          return _rowIndex;
      }
  
      public Object getWrappedData()
      {
          return _data;
      }
  
      public boolean isRowAvailable()
      {
          if (getRows() == null)
          {
              return false;
          }
          return _rowIndex >= 0 && _rowIndex < getRows().length;
      }
  
      public void setRowIndex(int rowIndex)
      {
          if (rowIndex < -1)
          {
              throw new IllegalArgumentException("illegal rowIndex " + rowIndex);
          }
          int oldRowIndex = _rowIndex;
          _rowIndex = rowIndex;
          if (getRows() != null && oldRowIndex != _rowIndex)
          {
             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[] getRows()
     {
         if(_data==null)
             return null;
 
         return _data.getRows();
     }
 
     public void setWrappedData(Object data)
     {
         if (data == null)
         {
             setRowIndex(-1);
         }
         else
         {
             _data = ((Result)data);
             setRowIndex(0);
         }
     }
 
 }