content: /*
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.cloudapp.util;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileReader;
  import java.util.Collections;
  import java.util.Map;
  import java.util.Properties;
  
  public class FileUtils {
      private final static Logger logger = LoggerFactory.getLogger(FileUtils.class);
      public static Map readPropertiesFromFile(String filePath) {
  
          File file = new File(filePath);
  
          if (!file.exists()) {
              logger.error("Failed to read properties from file {}, file not exits",
                      filePath);
              return Collections.emptyMap();
          }
  
          if (!file.canRead()) {
              logger.error("Failed to read properties from file {}, file can't read",
                      filePath);
              return Collections.emptyMap();
          }
  
          Properties properties = new Properties();
  
          try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
              properties.load(reader);
          } catch (Throwable t) {
              logger.error("Failed to read properties from file {}", filePath, t);
          }
  
          if (properties.isEmpty()) {
              return Collections.emptyMap();
          }
  
          return properties;
      }
  }
  