org.apache.solr.client.solrj.io.stream.metrics

Class CountDistinctMetric

java.lang.Object

org.apache.solr.client.solrj.io.stream.metrics.Metric

org.apache.solr.client.solrj.io.stream.metrics.CountDistinctMetric

All Implemented Interfaces:

Expressible

public class CountDistinctMetric
extends Metric

Field Summary

Fields

Modifier and Type	Field and Description
static String	APPROX_COUNT_DISTINCT
static String	COUNT_DISTINCT

Fields inherited from class org.apache.solr.client.solrj.io.stream.metrics.Metric

outputLong

Constructor Summary

Constructors

Constructor and Description
CountDistinctMetric(StreamExpression expression, StreamFactory factory)
CountDistinctMetric(String columnName)
CountDistinctMetric(String columnName, boolean isApproximate)

Method Summary

Modifier and Type	Method and Description
String[]	getColumns()
Number	getValue()
Metric	newInstance()
StreamExpressionParameter	toExpression(StreamFactory factory)
void	update(Tuple tuple)

Methods inherited from class org.apache.solr.client.solrj.io.stream.metrics.Metric

getFunctionName, getIdentifier, getMetricNodeId, setFunctionName, setIdentifier, setIdentifier, toExplanation

Methods inherited from class java.lang.Object

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

Field Detail

COUNT_DISTINCT

public static final String COUNT_DISTINCT

See Also:

Constant Field Values

APPROX_COUNT_DISTINCT

public static final String APPROX_COUNT_DISTINCT

See Also:

Constant Field Values

Constructor Detail

CountDistinctMetric

public CountDistinctMetric(String columnName)

CountDistinctMetric

public CountDistinctMetric(String columnName,
                           boolean isApproximate)

CountDistinctMetric

public CountDistinctMetric(StreamExpression expression,
                           StreamFactory factory)
                    throws IOException

Throws:

IOException

Method Detail

update

public void update(Tuple tuple)

Specified by:

update in class Metric

newInstance

public Metric newInstance()

Specified by:

newInstance in class Metric

getColumns

public String[] getColumns()

Specified by:

getColumns in class Metric

getValue

public Number getValue()

Specified by:

getValue in class Metric

toExpression

public StreamExpressionParameter toExpression(StreamFactory factory)
                                       throws IOException

Throws:

IOException