package ca.uhn.fhir.model.api;
   
   /*
    * #%L
    * HAPI FHIR - Core Library
    * %%
    * Copyright (C) 2014 University Health Network
    * %%
    * 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.
   * #L%
   */
  
  import java.util.Calendar;
  import java.util.Date;
  
  import org.apache.commons.lang3.time.DateUtils;
  
  public enum TemporalPrecisionEnum {
  
  	YEAR(Calendar.YEAR) {
  		@Override
  		public Date add(Date theInput, int theAmount) {
  			return DateUtils.addYears(theInput, theAmount);
  		}
  	},
  	
  	MONTH(Calendar.MONTH) {
  		@Override
  		public Date add(Date theInput, int theAmount) {
  			return DateUtils.addMonths(theInput, theAmount);
  		}
  	},
  	DAY(Calendar.DATE) {
  		@Override
  		public Date add(Date theInput, int theAmount) {
  			return DateUtils.addDays(theInput, theAmount);
  		}
  	},
  	SECOND(Calendar.SECOND) {
  		@Override
  		public Date add(Date theInput, int theAmount) {
  			return DateUtils.addSeconds(theInput, theAmount);
  		}
  	},
  	
  	MILLI(Calendar.MILLISECOND) {
  		@Override
  		public Date add(Date theInput, int theAmount) {
  			return DateUtils.addMilliseconds(theInput, theAmount);
  		}
  	},
  	
  	;
  	
  	private int myCalendarConstant;
  
  	TemporalPrecisionEnum(int theCalendarConstant) {
  		myCalendarConstant = theCalendarConstant;
  	}
  
  	public abstract Date add(Date theInput, int theAmount);
  	
  	public int getCalendarConstant() {
  		return myCalendarConstant;
  	}
  
  }