stream.learner

Class MetaDataLearner

java.lang.Object

stream.AbstractProcessor

stream.learner.MetaDataLearner

All Implemented Interfaces:

MetaDataService, Processor, Service, StatefulProcessor

public class MetaDataLearner
extends AbstractProcessor
implements MetaDataService

Author:

chris

Field Summary

Fields

Modifier and Type	Field and Description
(package private) String[]	keys
(package private) static org.slf4j.Logger	log
(package private) Set<String>	observed
(package private) Map<String,Statistics>	stats

Fields inherited from class stream.AbstractProcessor

context

Constructor Summary

Constructors

Constructor and Description
MetaDataLearner()

Method Summary

Modifier and Type	Method and Description
String[]	getKeys()
Statistics	getStatistics(String key)
Set<Serializable>	getTopValues(String key)
Data	process(Data input)
void	reset()
void	setKeys(String[] keys)
protected Statistics	update(Statistics st, Double value)
protected Statistics	update(Statistics st, String value)

Methods inherited from class stream.AbstractProcessor

finish, init, resetState

Methods inherited from class java.lang.Object

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

Field Detail

log

static org.slf4j.Logger log

keys

String[] keys

observed

final Set<String> observed

stats

Map<String,Statistics> stats

Constructor Detail

MetaDataLearner

public MetaDataLearner()

Method Detail

getKeys

public String[] getKeys()

Returns:

the keys

setKeys

public void setKeys(String[] keys)

Parameters:

keys - the keys to set

process

public Data process(Data input)

Specified by:

process in interface Processor

See Also:

Processor.process(stream.Data)

update

protected Statistics update(Statistics st,
                            Double value)

update

protected Statistics update(Statistics st,
                            String value)

getStatistics

public Statistics getStatistics(String key)

Specified by:

getStatistics in interface MetaDataService

See Also:

MetaDataService.getStatistics(java.lang.String)

getTopValues

public Set<Serializable> getTopValues(String key)

Specified by:

getTopValues in interface MetaDataService

See Also:

MetaDataService.getTopValues(java.lang.String)

reset

public void reset()
           throws Exception

Specified by:

reset in interface Service

Throws:

Exception

See Also:

Service.reset()