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.CapitalizationEnum;
  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.DayOfWeek;
  import java.time.ZonedDateTime;
  import java.time.format.TextStyle;
  import java.util.Locale;
  import java.util.Set;
  
  /**
   * The date/time format compiled component for a text representation of a day of
   * the week.
   */
  public class DayOfWeekCompiledPattern extends CompiledPattern {
    private final CapitalizationEnum capitalization;
    private final TextStyle textStyle;
  
    public DayOfWeekCompiledPattern(Set<PatternModifier> modifiers,
        CapitalizationEnum capitalization, TextStyle textStyle) {
      super(ChronoUnitEnum.DAYS_IN_WEEK, modifiers);
      this.capitalization = capitalization;
      this.textStyle = textStyle;
    }
  
    @Override public String convertToString(ZonedDateTime dateTime, Locale locale) {
      final Locale localeToUse = modifiers.contains(PatternModifier.TM) ? locale : Locale.US;
      final int intValue = dateTime.getDayOfWeek().getValue();
      final String stringValue =
          capitalization.apply(
              DayOfWeek.of(intValue).getDisplayName(textStyle, localeToUse), localeToUse);
  
      if (textStyle == TextStyle.FULL && !modifiers.contains(PatternModifier.FM)
          && !modifiers.contains(PatternModifier.TM)) {
        return String.format(locale, "%-9s", stringValue);
      }
  
      return stringValue;
    }
  
    @Override public int parseValue(ParsePosition inputPosition, String input, boolean enforceLength,
        Locale locale) throws ParseException {
      final Locale localeToUse = modifiers.contains(PatternModifier.TM) ? locale : Locale.US;
      final String inputTrimmed = input.substring(inputPosition.getIndex());
  
      for (DayOfWeek dayOfWeek : DayOfWeek.values()) {
        final String expectedValue =
            capitalization.apply(dayOfWeek.getDisplayName(textStyle, localeToUse), localeToUse);
        if (inputTrimmed.startsWith(expectedValue)) {
          inputPosition.setIndex(inputPosition.getIndex() + expectedValue.length());
          return dayOfWeek.getValue();
        }
      }
  
      throw new ParseException("Unable to parse value", inputPosition.getIndex());
    }
  
    @Override protected int getBaseFormatPatternLength() {
      return textStyle == TextStyle.FULL ? 3 : 2;
    }
  }
  