import org.apache.hadoop.mapreduce.v2.proto.MRProtos.StringCounterMapProto; //导入依赖的package包/类
private void initCounters() {
  if (this.counters != null) {
    return;
  }
  CounterGroupProtoOrBuilder p = viaProto ? proto : builder;
  List<StringCounterMapProto> list = p.getCountersList();
  this.counters = new HashMap<String, Counter>();

  for (StringCounterMapProto c : list) {
    this.counters.put(c.getKey(), convertFromProtoFormat(c.getValue()));
  }
}
 

import org.apache.hadoop.mapreduce.v2.proto.MRProtos.StringCounterMapProto; //导入依赖的package包/类
private void addContersToProto() {
  maybeInitBuilder();
  builder.clearCounters();
  if (counters == null)
    return;
  Iterable<StringCounterMapProto> iterable = new Iterable<StringCounterMapProto>() {
    
    @Override
    public Iterator<StringCounterMapProto> iterator() {
      return new Iterator<StringCounterMapProto>() {
        
        Iterator<String> keyIter = counters.keySet().iterator();
        
        @Override
        public void remove() {
          throw new UnsupportedOperationException();
        }
        
        @Override
        public StringCounterMapProto next() {
          String key = keyIter.next();
          return StringCounterMapProto.newBuilder().setKey(key).setValue(convertToProtoFormat(counters.get(key))).build();
        }
        
        @Override
        public boolean hasNext() {
          return keyIter.hasNext();
        }
      };
    }
  };
  builder.addAllCounters(iterable);
}