org.apache.hadoop.record
Class RecordComparator

java.lang.Object
  extended by org.apache.hadoop.io.WritableComparator
      extended by org.apache.hadoop.record.RecordComparator
All Implemented Interfaces:
Comparator, Configurable, RawComparator

Deprecated. Replaced by Avro.

@Deprecated
@InterfaceAudience.Public
@InterfaceStability.Stable
public abstract class RecordComparator
extends WritableComparator

A raw record comparator base class


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

Constructor Detail

RecordComparator

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

Method Detail

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


Copyright © 2014 Apache Software Foundation. All Rights Reserved.