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java.lang.Objectorg.apache.hadoop.io.WritableComparator
org.apache.mahout.common.IntPairWritable.FirstGroupingComparator
public static class IntPairWritable.FirstGroupingComparator
Compare only the first part of the pair, so that reduce is called once for each value of the first part.
| Constructor Summary | |
|---|---|
IntPairWritable.FirstGroupingComparator()
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| Method Summary | |
|---|---|
int |
compare(byte[] b1,
int s1,
int l1,
byte[] b2,
int s2,
int l2)
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int |
compare(Object o1,
Object o2)
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| Methods inherited from class org.apache.hadoop.io.WritableComparator |
|---|
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 |
| Methods inherited from interface java.util.Comparator |
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equals |
| Constructor Detail |
|---|
public IntPairWritable.FirstGroupingComparator()
| Method Detail |
|---|
public int compare(byte[] b1,
int s1,
int l1,
byte[] b2,
int s2,
int l2)
compare in interface org.apache.hadoop.io.RawComparatorcompare in class org.apache.hadoop.io.WritableComparator
public int compare(Object o1,
Object o2)
compare in interface Comparatorcompare in class org.apache.hadoop.io.WritableComparator
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