/*
    *  Copyright 2001-2005 Stephen Colebourne
    *
    *  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.joda.time.chrono;
  
  import org.joda.time.DateTimeFieldType;
  import org.joda.time.DurationField;
  import org.joda.time.ReadablePartial;
  import org.joda.time.field.PreciseDurationDateTimeField;
  
  /**
   * Provides time calculations for the day of the month component of time.
   *
   * @author Guy Allard
   * @author Stephen Colebourne
   * @author Brian S O'Neill
   * @since 1.1, refactored from GJDayOfMonthDateTimeField
   */
  final class BasicDayOfMonthDateTimeField extends PreciseDurationDateTimeField {
  
      private static final long serialVersionUID = -4677223814028011723L;
  
      private final BasicChronology iChronology;
  
      /**
       * Restricted constructor.
       */
      BasicDayOfMonthDateTimeField(BasicChronology chronology, DurationField days) {
          super(DateTimeFieldType.dayOfMonth(), days);
          iChronology = chronology;
      }
  
      //-----------------------------------------------------------------------
      public int get(long instant) {
          return iChronology.getDayOfMonth(instant);
      }
  
      public DurationField getRangeDurationField() {
          return iChronology.months();
      }
  
      public int getMinimumValue() {
          return 1;
      }
  
      public int getMaximumValue() {
          return iChronology.getDaysInMonthMax();
      }
  
      public int getMaximumValue(long instant) {
          return iChronology.getDaysInMonthMax(instant);
      }
  
      public int getMaximumValue(ReadablePartial partial) {
          if (partial.isSupported(DateTimeFieldType.monthOfYear())) {
              int month = partial.get(DateTimeFieldType.monthOfYear());
              if (partial.isSupported(DateTimeFieldType.year())) {
                  int year = partial.get(DateTimeFieldType.year());
                  return iChronology.getDaysInYearMonth(year, month);
              }
              return iChronology.getDaysInMonthMax(month);
          }
          return getMaximumValue();
      }
  
      public int getMaximumValue(ReadablePartial partial, int[] values) {
          int size = partial.size();
          for (int i = 0; i < size; i++) {
              if (partial.getFieldType(i) == DateTimeFieldType.monthOfYear()) {
                  int month = values[i];
                  for (int j = 0; j < size; j++) {
                      if (partial.getFieldType(j) == DateTimeFieldType.year()) {
                          int year = values[j];
                          return iChronology.getDaysInYearMonth(year, month);
                      }
                  }
                  return iChronology.getDaysInMonthMax(month);
              }
          }
          return getMaximumValue();
      }
  
      protected int getMaximumValueForSet(long instant, int value) {
          return iChronology.getDaysInMonthMaxForSet(instant, value);
      }
  
      /**
      * Serialization singleton
      */
     private Object readResolve() {
         return iChronology.dayOfMonth();
     }
 }