org.apache.inlong.sort.filesystem.shaded.com.amazonaws.jmespath.CamelCaseUtils Maven / Gradle / Ivy
/*
* Copyright 2010-2022 Amazon.com, Inc. or its affiliates. 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.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.amazonaws.jmespath;
final class CamelCaseUtils {
private CamelCaseUtils() {
}
/**
* This matches the algorithm that Jackson uses to convert getter names to JSON field names. Any names starting with a
* lowercase character are left as is, any names starting with one or more uppercase characters have all consecutive
* uppercase characters converted to lowercase. See tests for examples.
*
* @see BeanUtil.java
*/
public static String toCamelCase(String str) {
if (str == null || str.isEmpty()) {
return str;
}
StringBuilder stringBuilder = new StringBuilder();
boolean foundFirstLowercase = false;
for (char cur : str.toCharArray()) {
if (Character.isUpperCase(cur) && !foundFirstLowercase) {
stringBuilder.append(Character.toLowerCase(cur));
} else {
foundFirstLowercase = true;
stringBuilder.append(cur);
}
}
return stringBuilder.toString();
}
}