Package org.apache.hadoop.record

Class RecordComparator

java.lang.Object

org.apache.hadoop.io.WritableComparator

org.apache.hadoop.record.RecordComparator

All Implemented Interfaces:

Comparator, Configurable, RawComparator

@Deprecated
@Public
@Stable
public abstract class RecordComparator
extends WritableComparator

Deprecated.

Replaced by Avro.

A raw record comparator base class

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RecordComparator(Class<? extends WritableComparable> recordClass)	Deprecated. Construct a raw Record comparison implementation.

Method Summary

Modifier and Type	Method	Description
abstract int	compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2)	Deprecated. Optimization hook.
static void	define(Class c, RecordComparator comparator)	Deprecated. Register an optimized comparator for a Record implementation.

Methods inherited from class org.apache.hadoop.io.WritableComparator

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

RecordComparator

protected RecordComparator(Class<? extends WritableComparable> recordClass)

Deprecated.

Construct a raw Record comparison implementation.

Method Details

compare

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

Deprecated.

Description copied from class: WritableComparator

Optimization hook. Override this to make SequenceFile.Sorter's scream.

The default implementation reads the data into two WritableComparables (using Writable.readFields(DataInput), then calls WritableComparator.compare(WritableComparable,WritableComparable).

Specified by:

compare in interface RawComparator

Overrides:

compare in class WritableComparator

Parameters:

b1 - The first byte array.

s1 - The position index in b1. The object under comparison's starting index.

l1 - The length of the object in b1.

b2 - The second byte array.

s2 - The position index in b2. The object under comparison's starting index.

l2 - The length of the object under comparison in b2.

Returns:

An integer result of the comparison.

define

public static void define(Class c,
 RecordComparator comparator)

Deprecated.

Register an optimized comparator for a Record implementation.

Parameters:

c - record classs for which a raw comparator is provided

comparator - Raw comparator instance for class c