org.apache.hadoop.io
Class Text.Comparator
java.lang.Object
org.apache.hadoop.io.WritableComparator
org.apache.hadoop.io.Text.Comparator
- All Implemented Interfaces:
- Comparator, RawComparator
- Enclosing class:
- Text
public static class Text.Comparator
- extends WritableComparator
A WritableComparator optimized for Text keys.
Method Summary |
int |
compare(byte[] b1,
int s1,
int l1,
byte[] b2,
int s2,
int l2)
Optimization hook. |
Methods inherited from class org.apache.hadoop.io.WritableComparator |
compare, compare, compareBytes, define, get, getKeyClass, hashBytes, hashBytes, newKey, readDouble, readFloat, readInt, readLong, readUnsignedShort, readVInt, readVLong |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Text.Comparator
public Text.Comparator()
compare
public int compare(byte[] b1,
int s1,
int l1,
byte[] b2,
int s2,
int l2)
- Description copied from class:
WritableComparator
- Optimization hook. Override this to make SequenceFile.Sorter's scream.
The default implementation reads the data into two WritableComparable
s (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.
Copyright © 2013 Apache Software Foundation. All Rights Reserved.