com.aliyun.odps.io

Class ByteWritable

java.lang.Object

com.aliyun.odps.io.ByteWritable

All Implemented Interfaces:

Writable, WritableComparable<ByteWritable>, Comparable<ByteWritable>

public class ByteWritable
extends Object
implements WritableComparable<ByteWritable>

ByteWritable 提供了 tinyint 的 Writable 和 WritableComparable 的实现

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ByteWritable.Comparator ByteWritable 对象的 WritableComparator 自然顺序实现（升序）.

Constructor Summary

Constructors

Constructor and Description
ByteWritable()
ByteWritable(byte value)

Method Summary

Modifier and Type	Method and Description
int	compareTo(ByteWritable o) 比较两个 tinyintWritable 的值.
boolean	equals(Object o) 判断两个 tinyintWritable 是否相等.
byte	get()
int	hashCode() 计算哈希值，直接返回此 ByteWritable 的值.
void	readFields(DataInput in) 从指定的 DataInput in 反序列化.
void	set(byte value)
String	toString()
void	write(DataOutput out) 序列化到指定的 DataOutput out.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ByteWritable

public ByteWritable()

ByteWritable

public ByteWritable(byte value)

Method Detail

write

public void write(DataOutput out)
           throws IOException

序列化到指定的 DataOutput out.

Specified by:

write in interface Writable

Parameters:

out -

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

从指定的 DataInput in 反序列化.

Specified by:

readFields in interface Writable

Parameters:

in -

Throws:

IOException

equals

public boolean equals(Object o)

判断两个 tinyintWritable 是否相等. 如果两个都是 tinyintWritable 且值相等，返回true，否则返回false

Overrides:

equals in class Object

Parameters:

o -

Returns:

hashCode

public int hashCode()

计算哈希值，直接返回此 ByteWritable 的值.

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

compareTo

public int compareTo(ByteWritable o)

比较两个 tinyintWritable 的值.

Specified by:

compareTo in interface Comparable<ByteWritable>

Parameters:

o - 比较对象

Returns:

(this < o ? -1 : (this == o) ? 0 ：1))

get

public byte get()

set

public void set(byte value)