com.aliyun.odps.io

Class TimestampWritable.DecreasingComparator

java.lang.Object

com.aliyun.odps.io.WritableComparator

com.aliyun.odps.io.TimestampWritable.Comparator

com.aliyun.odps.io.TimestampWritable.DecreasingComparator

All Implemented Interfaces:

RawComparator, Comparator

Enclosing class:

TimestampWritable

public static class TimestampWritable.DecreasingComparator
extends TimestampWritable.Comparator

TimestampWritable 对象的 WritableComparator 降序实现.

Constructor Summary

Constructors

Constructor and Description
DecreasingComparator()

Method Summary

Modifier and Type	Method and Description
int	compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) 基于二进制内容的 TimestampWritable 对象比较函数.
int	compare(WritableComparable a, WritableComparable b) 比较两个 WritableComparable 对象.

Methods inherited from class com.aliyun.odps.io.WritableComparator

compare, compareBytes, define, get, getKeyClass, hashBytes, newKey, readDouble, readFloat, readInt, readLong, readUnsignedShort, readVInt, readVLong

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

DecreasingComparator

public DecreasingComparator()

Method Detail

compare

public int compare(WritableComparable a,
                   WritableComparable b)

Description copied from class: WritableComparator

比较两个 WritableComparable 对象.

按自然顺序比较两个 WritableComparable 对象，直接调用 Comparable.compareTo(Object).

Overrides:

compare in class WritableComparator

Parameters:

a - 左边 WritableComparable 对象

b - 右边 WritableComparable 对象

Returns:

a.compareTo(b)

compare

public int compare(byte[] b1,
                   int s1,
                   int l1,
                   byte[] b2,
                   int s2,
                   int l2)

Description copied from class: TimestampWritable.Comparator

基于二进制内容的 TimestampWritable 对象比较函数.

Specified by:

compare in interface RawComparator

Overrides:

compare in class TimestampWritable.Comparator

Parameters:

b1 - 对象1二进制内容所在的byte数组

s1 - 对象1二进制内容在b1的起始位置

l1 - 对象1二进制内容长度

b2 - 对象2二进制内容所在的byte数组

s2 - 对象2二进制内容在b2的起始位置

l2 - 对象2二进制内容长度

Returns:

对象1>对象2，返回1，对象1=对象2，返回0，对象1<对象2，返回-1