content: /*
   * Copyright 2013-2023 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 com.alibaba.cloud.nacos.annotation;
  
  import java.io.StringReader;
  import java.util.Map;
  import java.util.Properties;
  
  import com.alibaba.nacos.common.utils.StringUtils;
  import org.yaml.snakeyaml.LoaderOptions;
  import org.yaml.snakeyaml.Yaml;
  import org.yaml.snakeyaml.constructor.SafeConstructor;
  
  final class PropertiesUtils {
  
  	private PropertiesUtils() {
  	}
  
  	public static Properties convertToProperties(String content) throws Exception {
  		if (StringUtils.isBlank(content)) {
  			return new Properties();
  		}
  		try {
  			return convertFormYamlContent(content);
  		}
  		catch (Exception e) {
  			return convertFormPropertiesContent(content);
  		}
  	}
  
  	private static Properties convertFormPropertiesContent(String content) throws Exception {
  		Properties properties = new Properties();
  		properties.load(new StringReader(content));
  		return properties;
  	}
  
  	private static Properties convertFormYamlContent(String content) {
  
  		Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()));
  		Map<String, Object> yamlMap = yaml.load(content);
  
  		Properties properties = new Properties();
  		flattenMap("", yamlMap, properties);
  
  		return properties;
  	}
  
  	private static void flattenMap(String prefix, Map<String, Object> map, Properties properties) {
  		for (Map.Entry<String, Object> entry : map.entrySet()) {
  			String key =
  					prefix.isEmpty() ? String.valueOf(entry.getKey()) : prefix + "." + String.valueOf(entry.getKey());
  			if (entry.getValue() instanceof Map) {
  				flattenMap(key, (Map<String, Object>) entry.getValue(), properties);
  			}
  			else {
  				properties.setProperty(key, entry.getValue().toString());
  			}
  		}
  	}
  }
  