/*
    * 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 org.apache.myfaces.convert;
  
  
  /**
   * TODO: Move to util package and rename to better name
   *
   * @author Manfred Geiler (latest modification by $Author$)
   * @version $Revision$ $Date$
   */
  public final class ConverterUtils
  {
      private ConverterUtils() {}
  
  
      public static int convertToInt(Object value)
      {
          if (value instanceof Number)
          {
              return ((Number) value).intValue();
          }
          else if (value instanceof String)
          {
              try
              {
                  return Integer.parseInt((String) value);
              }
              catch (NumberFormatException e)
              {
                  throw new IllegalArgumentException("Cannot convert " + value.toString() + " to int");
              }
          }
          else
          {
              throw new IllegalArgumentException("Cannot convert " + value.toString() + " to int");
          }
      }
  
      public static boolean convertToBoolean(Object value)
      {
          if (value instanceof Boolean)
          {
              return ((Boolean) value);
          }
          else if (value instanceof String)
          {
              try
              {
                  return Boolean.parseBoolean((String) value);
              }
              catch (Exception e)
              {
                  throw new IllegalArgumentException("Cannot convert " + value.toString() + " to boolean");
              }
          }
          else
          {
              throw new IllegalArgumentException("Cannot convert " + value.toString() + " to boolean");
          }
      }    
  
      public static long convertToLong(Object value)
      {
          if (value instanceof Number)
          {
              return ((Number) value).longValue();
          }
          else if (value instanceof String)
          {
              try
              {
                  return Long.parseLong((String) value);
              }
              catch (NumberFormatException e)
              {
                  throw new IllegalArgumentException("Cannot convert " + value.toString() + " to long");
              }
          }
          else
          {
              throw new IllegalArgumentException("Cannot convert " + value.toString() + " to long");
          }
     }
 
     public static double convertToDouble(Object value)
     {
         if (value instanceof Number)
         {
             return ((Number) value).doubleValue();
         }
         else if (value instanceof String)
         {
             try
             {
                 return Double.parseDouble((String) value);
             }
             catch (NumberFormatException e)
             {
                 throw new IllegalArgumentException("Cannot convert " + value.toString() + " to double");
             }
         }
         else
         {
             throw new IllegalArgumentException("Cannot convert " + value.toString() + " to double");
         }
     }
 
 
 }