/**
    * Copyright 2010 The Kuali Foundation Licensed under the
    * Educational Community 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.osedu.org/licenses/ECL-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.kuali.student.common.validator;
  
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  public class ServerDateParser implements DateParser {
     
  	private static ThreadLocal<SimpleDateFormat[]> formats = new ThreadLocal<SimpleDateFormat[]>() {
  
  		protected SimpleDateFormat[] initialValue() {
  			return new SimpleDateFormat[] {
  		    		new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"), 
  		    		new SimpleDateFormat("yyyy-MM-dd"), 
  		    		new SimpleDateFormat("yyyy-MMM-dd"),
  		    		new SimpleDateFormat("dd-MM-yyyy"),
  		    		new SimpleDateFormat("dd-MMM-yyyy")
  		    };
  		}
  
  	};
  	
      
      public Date parseDate(String input) {
          Date result = null;
          
          for (SimpleDateFormat format : formats.get()) {
                  try {
                      result = format.parse(input);
                  } catch (Exception e) {
                      // just eat it
                  }
                  if (result != null) {
                      break;
                  }
              
          }
          
          if (result == null) {
              throw new DateParseException("Invalid date value: " + input);
          }
          
          return result;
      }
  
      /**
       * @see org.kuali.student.common.validator.old.DateParser#toString(java.util.Date)
       */
      @Override
      public String toString(Date date) {
          String result = null;
          SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-ddTHH:mm:ss,SSS");
          result = format.format(date);
  
          return result;        
      }
  }