/*
    *  Copyright 2010, 2011 Christopher Pheby
    *
    *  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.jadira.usertype.dateandtime.joda;
  
  import org.jadira.usertype.dateandtime.joda.columnmapper.StringColumnDateTimeZoneWithOffsetMapper;
  import org.jadira.usertype.dateandtime.joda.columnmapper.StringColumnLocalDateTimeMapper;
  import org.jadira.usertype.dateandtime.joda.util.DateTimeZoneWithOffset;
  import org.jadira.usertype.spi.shared.AbstractParameterizedTemporalMultiColumnUserType;
  import org.jadira.usertype.spi.shared.ColumnMapper;
  import org.jadira.usertype.spi.utils.reflection.ArrayUtils;
  import org.joda.time.DateTime;
  import org.joda.time.DateTimeZone;
  import org.joda.time.LocalDateTime;
  
  /**
   * Persist {@link org.joda.time.DateTime} via Hibernate. The offset will be stored in an extra column.
   */
  public class PersistentDateTimeAsString extends AbstractParameterizedTemporalMultiColumnUserType<DateTime> {
  
      private static final long serialVersionUID = 1364221029397346011L;
  
      private static final ColumnMapper<?, ?>[] COLUMN_MAPPERS = new ColumnMapper<?, ?>[] { new StringColumnLocalDateTimeMapper(), new StringColumnDateTimeZoneWithOffsetMapper() };
  
      private static final String[] PROPERTY_NAMES = new String[]{ "datetime", "offset" };
  
      @Override
      protected ColumnMapper<?, ?>[] getColumnMappers() {
          return COLUMN_MAPPERS;
      }
  
      @Override
      public String[] getPropertyNames() {
          return ArrayUtils.copyOf(PROPERTY_NAMES);
      }
  
      @Override
      protected DateTime fromConvertedColumns(Object[] convertedColumns) {
  
          LocalDateTime datePart = (LocalDateTime) convertedColumns[0];
          DateTimeZoneWithOffset offset = (DateTimeZoneWithOffset) convertedColumns[1];
  
          DateTime result;
  
          if (datePart == null) {
              result = null;
          } else {
              result = datePart.toDateTime(offset.getStandardDateTimeZone());            
          }
          
          // Handling DST rollover
          if (result != null && offset.getOffsetDateTimeZone() != null &&
          		offset.getStandardDateTimeZone().getOffset(result) > offset.getOffsetDateTimeZone().getOffset(result)) {
          	return result.withLaterOffsetAtOverlap();
          }
  
          return result;
      }
  
      @Override
      protected Object[] toConvertedColumns(DateTime value) {
  
          return new Object[] { value.toLocalDateTime(), new DateTimeZoneWithOffset(value.getZone(), value.getZone().isFixed() ? null : DateTimeZone.forOffsetMillis(value.getZone().getOffset(value))) };
      }
  }