com.aliyun.odps.io

Class BytesWritable.Comparator

java.lang.Object

com.aliyun.odps.io.WritableComparator

com.aliyun.odps.io.BytesWritable.Comparator

All Implemented Interfaces:

RawComparator, Comparator

Enclosing class:

BytesWritable

public static class BytesWritable.Comparator
extends WritableComparator

BytesWritable 对象的 WritableComparator 自然顺序实现（升序）.

Constructor Summary

Constructors

Constructor and Description
Comparator()

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 LongWritable 对象比较函数.

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

compare, 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

Comparator

public Comparator()

Method Detail

compare

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

基于二进制内容的 LongWritable 对象比较函数.

直接使用 WritableComparator.compareBytes(byte[], int, int, byte[], int, int) 进行二进制内容的比较

Specified by:

compare in interface RawComparator

Overrides:

compare in class WritableComparator

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