code: /*
   * 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.intel.hibench.common.streaming;
  
  import java.io.BufferedReader;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  
  public class ConfigLoader {
      private String ConfigFileName = null;
      private Map store;
  
      public ConfigLoader(String filename){
          ConfigFileName = filename;
          store = new HashMap();
          // Load and parse config
          try {
              BufferedReader br = new BufferedReader(new FileReader(filename));
              String line = br.readLine();
              while(line != null){
                  if ((line.length()>0) && (line.charAt(0)!='#')) {
                      String[] words = line.split("\\s+");
                      if (words.length == 2) {
                          String key = words[0];
                          String value = words[1];
                          store.put(key, value);
                      } else if (words.length == 1) {
                          String key = words[0];
                          store.put(key, "");
                      } else {
                          if (!line.startsWith("hibench"))
                              System.out.println("Warning: unknown config parsed, skip:" + line);
                      }
                  }
                  line = br.readLine();
              }
          } catch (FileNotFoundException e) {
              System.out.println("ERROR: Config file not found! Should not happen. Caused by:");
          } catch (IOException e) {
              System.out.println("ERROR: IO exception during read file. Should not happen. Caused by:");
              e.printStackTrace();
          }
      }
  
      public String getProperty(String key){
          if (store.containsKey(key))
              return (String) store.get(key);
          else {
              System.out.println("ERROR: Unknown config key:" + key);
              return null;
          }
      }
  }
  