org.apache.solr.analytics.statistics

Class MinMaxStatsCollector

java.lang.Object

org.apache.solr.analytics.statistics.MinMaxStatsCollector

All Implemented Interfaces:

StatsCollector

Direct Known Subclasses:

NumericStatsCollector

public class MinMaxStatsCollector
extends Object
implements StatsCollector

MinMaxStatsCollector computes the min, max, number of values and number of missing values.

Field Summary

Fields

Modifier and Type	Field and Description
protected FunctionValues	function
protected MutableValue	max
protected MutableValue	min
protected long	missingCount
protected ValueSource	source
protected Set<String>	statsList
protected MutableValue	value
protected long	valueCount
protected FunctionValues.ValueFiller	valueFiller

Constructor Summary

Constructors

Constructor and Description
MinMaxStatsCollector(ValueSource source, Set<String> statsList)

Method Summary

Modifier and Type	Method and Description
void	collect(int doc) Collect values from the value source and add to statistics.
void	compute() After all documents have been collected, this method should be called to finalize the calculations of each statistic.
FunctionValues	getFunction()
Comparable	getStat(String stat) Return the value of the given statistic.
Set<String>	getStatsList()
MutableValue	getValue()
void	setNextReader(LeafReaderContext context)
String	statString(String stat)
String	toString()
String	valueSourceString()

Methods inherited from class java.lang.Object

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

Field Detail

missingCount

protected long missingCount

valueCount

protected long valueCount

max

protected MutableValue max

min

protected MutableValue min

value

protected MutableValue value

statsList

protected final Set<String> statsList

source

protected final ValueSource source

function

protected FunctionValues function

valueFiller

protected FunctionValues.ValueFiller valueFiller

Constructor Detail

MinMaxStatsCollector

public MinMaxStatsCollector(ValueSource source,
                            Set<String> statsList)

Method Detail

setNextReader

public void setNextReader(LeafReaderContext context)
                   throws IOException

Specified by:

setNextReader in interface StatsCollector

Parameters:

context - The context to read documents from.

Throws:

IOException - if setting next reader fails

collect

public void collect(int doc)

Description copied from interface: StatsCollector

Collect values from the value source and add to statistics.

Specified by:

collect in interface StatsCollector

Parameters:

doc - Document to collect from

toString

public String toString()

Overrides:

toString in class Object

getStat

public Comparable getStat(String stat)

Description copied from interface: StatsCollector

Return the value of the given statistic.

Specified by:

getStat in interface StatsCollector

Parameters:

stat - the stat

Returns:

a comparable

getStatsList

public Set<String> getStatsList()

Specified by:

getStatsList in interface StatsCollector

Returns:

The set of statistics being computed by the stats collector.

compute

public void compute()

Description copied from interface: StatsCollector

After all documents have been collected, this method should be called to finalize the calculations of each statistic.

Specified by:

compute in interface StatsCollector

getValue

public MutableValue getValue()

Specified by:

getValue in interface StatsCollector

getFunction

public FunctionValues getFunction()

Specified by:

getFunction in interface StatsCollector

valueSourceString

public String valueSourceString()

Specified by:

valueSourceString in interface StatsCollector

Returns:

The string representation of the value source.

statString

public String statString(String stat)