com.mybatisflex.core.util.ArrayUtil Maven / Gradle / Ivy
/*
* Copyright (c) 2022-2025, Mybatis-Flex ([email protected]).
*
* 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.mybatisflex.core.util;
import java.util.Arrays;
import java.util.Objects;
public class ArrayUtil {
private ArrayUtil() {
}
/**
* 判断数组是否为空
*
* @param array 数组
* @param 数组类型
* @return {@code true} 数组为空，{@code false} 数组不为空
*/
public static boolean isEmpty(T[] array) {
return array == null || array.length == 0;
}
/**
* 判断数组是否不为空
*
* @param array 数组
* @param 数组类型
* @return {@code true} 数组不为空，{@code false} 数组为空
*/
public static boolean isNotEmpty(T[] array) {
return !isEmpty(array);
}
/**
* 合并两个数组为一个新的数组
*
* @param first 第一个数组
* @param second 第二个数组
* @param
* @return 新的数组
*/
public static T[] concat(T[] first, T[] second) {
if (first == null && second == null) {
throw new IllegalArgumentException("not allow first and second are null.");
} else if (isEmpty(first) && second != null) {
return second;
} else if (isEmpty(second)) {
return first;
} else {
T[] result = Arrays.copyOf(first, first.length + second.length);
System.arraycopy(second, 0, result, first.length, second.length);
return result;
}
}
public static T[] concat(T[] first, T[] second, T[] third, T[]... others) {
T[] results = concat(first, second);
results = concat(results, third);
if (others != null && others.length > 0) {
for (T[] other : others) {
results = concat(results, other);
}
}
return results;
}
/**
* 可变长参形式数组
*
* @param first 第一个数组
* @param second 第二个数组
* @param
* @return 新的数组
*/
@SafeVarargs
public static T[] append(T[] first, T... second) {
if (first == null && second == null) {
throw new IllegalArgumentException("not allow first and second are null.");
} else if (isEmpty(first) && second != null) {
return second;
} else if (isEmpty(second)) {
return first;
} else {
T[] result = Arrays.copyOf(first, first.length + second.length);
System.arraycopy(second, 0, result, first.length, second.length);
return result;
}
}
/**
* 查看数组中是否包含某一个值
*
* @param arrays 数组
* @param object 用于检测的值
* @param
* @return true 包含
*/
public static boolean contains(T[] arrays, T object) {
if (isEmpty(arrays)) {
return false;
}
for (T array : arrays) {
if (Objects.equals(array, object)) {
return true;
}
}
return false;
}
}