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.time.format.TextStyle;
  import java.util.Locale;
  import java.util.Set;
  
  /**
   * The date/time format compiled component for the 3 letter timezone code (such as UTC).
   * This is only supported when converting a date/time value to a string.
   */
  public class TimeZoneCompiledPattern extends CompiledPattern {
    private final boolean upperCase;
  
    public TimeZoneCompiledPattern(Set<PatternModifier> modifiers, boolean upperCase) {
      super(ChronoUnitEnum.TIMEZONE_MINUTES, modifiers);
      this.upperCase = upperCase;
    }
  
    @Override public String convertToString(ZonedDateTime dateTime, Locale locale) {
      final String stringValue =
          String.format(
              locale,
              "%3s",
              dateTime.getZone().getDisplayName(TextStyle.SHORT, Locale.US).toUpperCase(locale));
  
      if (upperCase) {
        return stringValue.toUpperCase(Locale.US);
      }
  
      return stringValue;
    }
  
    @Override public int parseValue(ParsePosition inputPosition, String input, boolean enforceLength,
        Locale locale) throws ParseException {
      throw new ParseException("TZ pattern is not supported in parsing datetime values",
          inputPosition.getIndex());
    }
  
    @Override protected int getBaseFormatPatternLength() {
      return 2;
    }
  }
  