org.dromara.hutool.db.sql.Direction Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* 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 org.dromara.hutool.db.sql;
import org.dromara.hutool.core.text.StrUtil;
/**
* 排序方式（升序或者降序）
*
* @author Looly
*/
public enum Direction {
/**
* 升序
*/
ASC,
/**
* 降序
*/
DESC;
/**
* 根据字符串值返回对应Direction值
*
* @param value 排序方式字符串，只能是 ASC或DESC
* @return Direction，{@code null}表示提供的value为空
* @throws IllegalArgumentException in case the given value cannot be parsed into an enum value.
*/
public static Direction fromString(final String value) throws IllegalArgumentException {
if (StrUtil.isEmpty(value)) {
return null;
}
// 兼容元数据中ASC和DESC表示
if (1 == value.length()) {
if ("A".equalsIgnoreCase(value)) {
return ASC;
} else if ("D".equalsIgnoreCase(value)) {
return DESC;
}
}
try {
return Direction.valueOf(value.toUpperCase());
} catch (final Exception e) {
throw new IllegalArgumentException(StrUtil.format(
"Invalid value [{}] for orders given!Has to be either 'desc' or 'asc' (case insensitive).", value), e);
}
}
}