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java.lang.Objectorg.apache.hadoop.mapred.lib.aggregate.LongValueSum
public class LongValueSum
This class implements a value aggregator that sums up a sequence of long values.
| Constructor Summary | |
|---|---|
LongValueSum()
the default constructor |
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| Method Summary | |
|---|---|
void |
addNextValue(long val)
add a value to the aggregator |
void |
addNextValue(Object val)
add a value to the aggregator |
ArrayList<String> |
getCombinerOutput()
|
String |
getReport()
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long |
getSum()
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void |
reset()
reset the aggregator |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public LongValueSum()
| Method Detail |
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public void addNextValue(Object val)
addNextValue in interface ValueAggregatorval - an object whose string representation represents a long value.public void addNextValue(long val)
val - a long value.public long getSum()
public String getReport()
getReport in interface ValueAggregatorpublic void reset()
reset in interface ValueAggregatorpublic ArrayList<String> getCombinerOutput()
getCombinerOutput in interface ValueAggregator
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