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/*
 * 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.drill.common.util;

import java.time.format.DateTimeFormatterBuilder;


/**
 * Extends regular {@link java.time.Instant#parse} with more formats.
 * By default, {@link java.time.format.DateTimeFormatter#ISO_INSTANT} used.
 */
public class DrillDateTimeFormatter {
  public static java.time.format.DateTimeFormatter ISO_DATETIME_FORMATTER =
    new DateTimeFormatterBuilder().append(java.time.format.DateTimeFormatter.ISO_LOCAL_DATE_TIME)
    .optionalStart().appendOffset("+HH:MM", "+00:00").optionalEnd()
    .optionalStart().appendOffset("+HHMM", "+0000").optionalEnd()
    .optionalStart().appendOffset("+HH", "Z").optionalEnd()
    .toFormatter();
}