content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you 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.apache.calcite.util.format.postgresql.format.compiled;
  
  import org.apache.calcite.util.format.postgresql.ChronoUnitEnum;
  import org.apache.calcite.util.format.postgresql.PatternModifier;
  
  import java.text.ParseException;
  import java.text.ParsePosition;
  import java.time.ZonedDateTime;
  import java.util.Locale;
  import java.util.Set;
  
  /**
   * The date/time format compiled component for the roman numeral representation of a
   * month.
   */
  public class RomanNumeralsCompiledPattern extends CompiledPattern {
    private final boolean upperCase;
  
    public RomanNumeralsCompiledPattern(Set<PatternModifier> modifiers, boolean upperCase) {
      super(ChronoUnitEnum.MONTHS_IN_YEAR, modifiers);
      this.upperCase = upperCase;
    }
  
    @Override public String convertToString(ZonedDateTime dateTime, Locale locale) {
      final String romanNumeral;
  
      switch (dateTime.getMonth().getValue()) {
      case 1:
        romanNumeral = "I";
        break;
      case 2:
        romanNumeral = "II";
        break;
      case 3:
        romanNumeral = "III";
        break;
      case 4:
        romanNumeral = "IV";
        break;
      case 5:
        romanNumeral = "V";
        break;
      case 6:
        romanNumeral = "VI";
        break;
      case 7:
        romanNumeral = "VII";
        break;
      case 8:
        romanNumeral = "VIII";
        break;
      case 9:
        romanNumeral = "IX";
        break;
      case 10:
        romanNumeral = "X";
        break;
      case 11:
        romanNumeral = "XI";
        break;
      default:
        romanNumeral = "XII";
        break;
      }
  
      if (upperCase) {
        return romanNumeral;
      } else {
        return romanNumeral.toLowerCase(Locale.US);
      }
    }
  
    @Override public int parseValue(ParsePosition inputPosition, String input, boolean enforceLength,
        Locale locale) throws ParseException {
      final String inputTrimmed = input.substring(inputPosition.getIndex());
  
      if (inputTrimmed.startsWith(upperCase ? "III" : "iii")) {
        inputPosition.setIndex(inputPosition.getIndex() + 3);
        return 3;
      } else if (inputTrimmed.startsWith(upperCase ? "II" : "ii")) {
        inputPosition.setIndex(inputPosition.getIndex() + 2);
        return 2;
      } else if (inputTrimmed.startsWith(upperCase ? "IV" : "iv")) {
        inputPosition.setIndex(inputPosition.getIndex() + 2);
        return 4;
      } else if (inputTrimmed.startsWith(upperCase ? "IX" : "ix")) {
        inputPosition.setIndex(inputPosition.getIndex() + 2);
        return 9;
      } else if (inputTrimmed.startsWith(upperCase ? "I" : "i")) {
        inputPosition.setIndex(inputPosition.getIndex() + 1);
        return 1;
      } else if (inputTrimmed.startsWith(upperCase ? "VIII" : "viii")) {
        inputPosition.setIndex(inputPosition.getIndex() + 4);
        return 8;
      } else if (inputTrimmed.startsWith(upperCase ? "VII" : "vii")) {
        inputPosition.setIndex(inputPosition.getIndex() + 3);
        return 7;
      } else if (inputTrimmed.startsWith(upperCase ? "VI" : "vi")) {
        inputPosition.setIndex(inputPosition.getIndex() + 2);
        return 6;
      } else if (inputTrimmed.startsWith(upperCase ? "V" : "v")) {
        inputPosition.setIndex(inputPosition.getIndex() + 1);
        return 5;
      } else if (inputTrimmed.startsWith(upperCase ? "XII" : "xii")) {
        inputPosition.setIndex(inputPosition.getIndex() + 3);
        return 12;
      } else if (inputTrimmed.startsWith(upperCase ? "XI" : "xi")) {
        inputPosition.setIndex(inputPosition.getIndex() + 2);
        return 11;
      } else if (inputTrimmed.startsWith(upperCase ? "X" : "x")) {
        inputPosition.setIndex(inputPosition.getIndex() + 1);
        return 10;
      }
  
      throw new ParseException("Unable to parse value", inputPosition.getIndex());
    }
  
    @Override protected int getBaseFormatPatternLength() {
      return 2;
    }
  }
  