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/*
 * Copyright (c) 2008-2024, Hazelcast, Inc. All Rights Reserved.
 *
 * 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.
 */

package com.hazelcast.jet.impl.util;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

public final class DateUtil {

    private static final DateTimeFormatter LOCAL_TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm:ss.SSS");

    private DateUtil() {
    }

    private static ZonedDateTime toZonedDateTime(long timestamp) {
        return Instant.ofEpochMilli(timestamp).atZone(ZoneId.systemDefault());
    }

    public static LocalDateTime toLocalDateTime(long timestamp) {
        return toZonedDateTime(timestamp).toLocalDateTime();
    }

    public static String toLocalTime(long timestamp) {
        return toZonedDateTime(timestamp).toLocalTime().format(LOCAL_TIME_FORMATTER);
    }
    public static String toEpochMillis(long timestamp) {
        return toZonedDateTime(timestamp).toLocalTime().format(LOCAL_TIME_FORMATTER);
    }
}