package hadoop.mapreduce.serializable;

import org.apache.hadoop.io.Writable;

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

    public String getName() {
        return name;
    }

    public long getData() {
        return up;
    }

    public long getSum() {
        return down;
    }

    public MySerializable() {
        //反射時會使用
    }

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

    //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 {
        //通過反射生成物件
        name=dataInput.readUTF();
        up= dataInput.readLong();
        down= dataInput.readLong();

    }
}