Key分析

org.apache.hadoop.util.bloom.Key

1.Key 继承WritableComparable

 成员变量：bytes[]  double weight

2.writable

  // Writable


  @Override
  public void write(DataOutput out) throws IOException {
    out.writeInt(bytes.length);
    out.write(bytes);
    out.writeDouble(weight);
  }
  
  @Override
  public void readFields(DataInput in) throws IOException {
    this.bytes = new byte[in.readInt()];
    in.readFully(this.bytes);
    weight = in.readDouble();
  }

3.comparable

// Comparable
  @Override
  public int compareTo(Key other) {
    int result = this.bytes.length - other.getBytes().length;
    for (int i = 0; result == 0 && i < bytes.length; i++) {
      result = this.bytes[i] - other.bytes[i];
    }
    
    if (result == 0) {
      result = Double.valueOf(this.weight - other.weight).intValue();
    }
    return result;
  }
}