icu.easyj.core.util.ComparableUtils Maven / Gradle / Ivy

/*
 * Copyright 2021 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.util;

/**
 * 比较工具类
 *
 * @author wangliang181230
 */
public abstract class ComparableUtils {

	/**
	 * Compare a and b.
	 *
	 * @param a   the comparable object a
	 * @param b   the comparable object b
	 * @param  the type of the a and b
	 * @return 0: equals   -1: {@code a < b}   1: {@code a > b}
	 */
	public static > int compare(T a, T b) {
		if (a == b) {
			return 0;
		} else if (a == null) {
			return -1;
		} else if (b == null) {
			return 1;
		}

		return a.compareTo(b);
	}
}