content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.client.config.impl;
  
  import com.alibaba.nacos.api.config.ConfigChangeItem;
  import com.alibaba.nacos.common.utils.StringUtils;
  
  import java.io.IOException;
  import java.io.StringReader;
  import java.util.Map;
  import java.util.Properties;
  
  /**
   * PropertiesChangeParser.
   *
   * @author rushsky518
   */
  public class PropertiesChangeParser extends AbstractConfigChangeParser {
      
      private static final String CONFIG_TYPE = "properties";
      
      public PropertiesChangeParser() {
          super(CONFIG_TYPE);
      }
      
      @Override
      public Map<String, ConfigChangeItem> doParse(String oldContent, String newContent, String type) throws IOException {
          Properties oldProps = new Properties();
          Properties newProps = new Properties();
          
          if (StringUtils.isNotBlank(oldContent)) {
              oldProps.load(new StringReader(oldContent));
          }
          if (StringUtils.isNotBlank(newContent)) {
              newProps.load(new StringReader(newContent));
          }
          
          return filterChangeData(oldProps, newProps);
      }
  }
  