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EasyJ核心，提供各种工具类、异常类、常量等等

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/*
 * Copyright 2021-2022 the original author or authors.
 *
 * 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
 *
 *      https://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 icu.easyj.core.clock;

import java.util.Date;

import org.springframework.lang.NonNull;

/**
 * 时钟接口
 *
 * @author wangliang181230
 */
public interface IClock {

	/**
	 * 当前时间
	 *
	 * @return now 当前时间
	 */
	@NonNull
	default Date now() {
		return new Date(currentTimeMillis());
	}

	/**
	 * 当前毫秒数
	 *
	 * @return timeMillis 毫秒数
	 */
	default long currentTimeMillis() {
		return currentTimeNanos() / 1000000;
	}

	/**
	 * 当前微秒数
	 *
	 * @return timeMicros 微秒数
	 */
	default long currentTimeMicros() {
		return currentTimeNanos() / 1000;
	}

	/**
	 * 当前纳秒数
	 * 注意：值格式与 {@link System#nanoTime()} 并不相同
	 *
	 * @return timeNanos 纳秒数
	 */
	long currentTimeNanos();
}