/**

  * Copyright 2005-2013 Dozer Project

  *

  * 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 org.dozer.converters;

 import org.apache.commons.beanutils.Converter;

 import javax.xml.datatype.XMLGregorianCalendar;

 import java.text.DateFormat;

 import java.text.ParseException;

 import java.util.Calendar;

 import java.util.Date;

 import java.util.GregorianCalendar;

 /**

  * Internal class for converting Supported Data Types --> Calendar. Supported source data types include Date, Calendar,

  * String, Objects that return a long from their toString(). Only intended for internal use.

  * 

  * @author tierney.matt

  */

 public class CalendarConverter implements Converter {

   private DateFormat dateFormat;

   public CalendarConverter(DateFormat dateFormat) {

     this.dateFormat = dateFormat;

   }

   public Object convert(Class destClass, Object srcObj) {

     Calendar result = new GregorianCalendar();

     Class srcFieldClass = srcObj.getClass();

     // Convert from Date to Calendar

     if (java.util.Date.class.isAssignableFrom(srcFieldClass)) {

       result.setTime((java.util.Date) srcObj);

     }

     //  Convert from Calendar to Calendar

     else if (Calendar.class.isAssignableFrom(srcFieldClass)) {

       Calendar c = (Calendar) srcObj;

       result.setTime(c.getTime());

       result.setTimeZone(c.getTimeZone());

     } else if (XMLGregorianCalendar.class.isAssignableFrom(srcFieldClass)) {

       Calendar c = ((XMLGregorianCalendar) srcObj).toGregorianCalendar();

       result.setTime(c.getTime());

       result.setTimeZone(c.getTimeZone());

     }

     // String to Calendar

     else if (dateFormat != null && String.class.isAssignableFrom(srcFieldClass)) {

       try {

         result.setTime(new Date(dateFormat.parse((String) srcObj).getTime()));

       } catch (ParseException e) {

         throw new ConversionException("Unable to parse source object using specified date format", e);

       }

       // Default conversion

     } else {

       try {

         result.setTime(new Date(Long.parseLong(srcObj.toString())));

       } catch (NumberFormatException e) {

         throw new ConversionException("Unable to determine time in millis of source object", e);

       }

     }

     return result;

   }

   public DateFormat getDateFormat() {

     return dateFormat;

   }

 }