Configuration.java 文件源码

@Override
public void readFields(DataInput in) throws IOException {
  clear();
  int size = WritableUtils.readVInt(in);
  for(int i=0; i < size; ++i) {
    String key = org.apache.hadoop.io.Text.readString(in);
    String value = org.apache.hadoop.io.Text.readString(in);
    set(key, value); 
    String sources[] = WritableUtils.readCompressedStringArray(in);
    if(sources != null) {
      updatingResource.put(key, sources);
    }
  }
}