com.aliyun.odps.io

Class AbstractDatetimeWritable<T extends AbstractDatetimeWritable>

java.lang.Object

com.aliyun.odps.io.AbstractDatetimeWritable<T>

All Implemented Interfaces:

Writable, WritableComparable<T>, Comparable<T>

Direct Known Subclasses:

DatetimeWritable, DateWritable, TimestampWritable

public abstract class AbstractDatetimeWritable<T extends AbstractDatetimeWritable>
extends Object
implements WritableComparable<T>

AbstractDatetimeWritable 提供了 datetime 的 Writable 和 WritableComparable 的实现

Method Summary

Modifier and Type	Method and Description
int	compareTo(T o) 比较两个 AbstractDatetimeWritable 的值.
boolean	equals(Object o) 判断两个 AbstractDatetimeWritable 是否相等.
long	get() 返回此 AbstractDatetimeWritable 的值
int	hashCode() 计算哈希值，直接返回此 AbstractDatetimeWritable 的值.
void	readFields(DataInput in) 从指定的 DataInput in 反序列化.
void	set(long value) 设置 AbstractDatetimeWritable 的值
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

Method Detail

set

public void set(long value)

设置 AbstractDatetimeWritable 的值

Parameters:

value - 要设置的时间刻度值，精确到毫秒

get

public long get()

返回此 AbstractDatetimeWritable 的值

Returns:

这个writable对应的时间刻度，精确到毫秒

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

从指定的 DataInput in 反序列化.

Specified by:

readFields in interface Writable

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

序列化到指定的 DataOutput out.

Specified by:

write in interface Writable

Throws:

IOException

equals

public boolean equals(Object o)

判断两个 AbstractDatetimeWritable 是否相等.

如果两个都是 AbstractDatetimeWritable 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 AbstractDatetimeWritable 的值.

Overrides:

hashCode in class Object

compareTo

public int compareTo(T o)

比较两个 AbstractDatetimeWritable 的值.

Specified by:

compareTo in interface Comparable<T extends AbstractDatetimeWritable>

Parameters:

o - 比较对象

Returns:

(this < o ? -1 : (this == o) ? 0 ：1))

toString

public String toString()

Overrides:

toString in class Object