package hadoop.mapreduce.serializable;

import org.apache.hadoop.io.Writable;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
/*
* 自定义Hadoop序列化
* */
public class MySerializable implements Writable {
    private String name;
    private long up;
    private long down;

    
    public MySerializable() {
        //反射时会使用
    }

    public MySerializable(String name, long up, long down) {
        this.name = name;
        this.up = up;
        this.down = down;
    }

    public String getName() {
        return name;
    }

    public long getUp() {
        return up;
    }

    public long getDown() {
        return down;
    }

    @Override
    public String toString() {
        return "MySerializable{" +
                "up=" + up +
                ", down=" + down +
                '}';
    }

    //序列化到流中
    @Override
    public void write(DataOutput dataOutput) throws IOException {
        dataOutput.writeUTF(name);
        dataOutput.writeLong(up);
        dataOutput.writeLong(down);

    }


    //反序列化
    @Override
    public void readFields(DataInput dataInput) throws IOException {
        //通过反射生成对象
        name=dataInput.readUTF();
        up= dataInput.readLong();
        down= dataInput.readLong();

    }
}