ApproximateHistogramAggregatorFactory (druid-histogram 0.9.1 API)

java.lang.Object
- io.druid.query.aggregation.AggregatorFactory
- - io.druid.query.aggregation.histogram.ApproximateHistogramAggregatorFactory

Direct Known Subclasses:: ApproximateHistogramFoldingAggregatorFactory

public class ApproximateHistogramAggregatorFactory
extends AggregatorFactory

Field Summary

Fields
Modifier and Type	Field and Description
`protected String`	`fieldName`
`protected float`	`lowerLimit`
`protected String`	`name`
`protected int`	`numBuckets`
`protected int`	`resolution`
`protected float`	`upperLimit`

Constructor Summary

Constructors
Constructor and Description
`ApproximateHistogramAggregatorFactory(String name, String fieldName, Integer resolution, Integer numBuckets, Float lowerLimit, Float upperLimit)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Object`	`combine(Object lhs, Object rhs)`
`Object`	`deserialize(Object object)`
`boolean`	`equals(Object o)`
`Aggregator`	`factorize(ColumnSelectorFactory metricFactory)`
`BufferAggregator`	`factorizeBuffered(ColumnSelectorFactory metricFactory)`
`Object`	`finalizeComputation(Object object)`
`Object`	`getAggregatorStartValue()`
`byte[]`	`getCacheKey()`
`AggregatorFactory`	`getCombiningFactory()`
`Comparator`	`getComparator()`
`String`	`getFieldName()`
`float`	`getLowerLimit()`
`int`	`getMaxIntermediateSize()`
`AggregatorFactory`	`getMergingFactory(AggregatorFactory other)`
`String`	`getName()`
`int`	`getNumBuckets()`
`List<AggregatorFactory>`	`getRequiredColumns()`
`int`	`getResolution()`
`String`	`getTypeName()`
`float`	`getUpperLimit()`
`int`	`hashCode()`
`List<String>`	`requiredFields()`
`String`	`toString()`

Methods inherited from class io.druid.query.aggregation.AggregatorFactory
mergeAggregators

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

name
```
protected final String name
```

fieldName
```
protected final String fieldName
```

resolution
```
protected final int resolution
```

numBuckets
```
protected final int numBuckets
```

lowerLimit
```
protected final float lowerLimit
```

upperLimit
```
protected final float upperLimit
```

Constructor Detail

ApproximateHistogramAggregatorFactory

public ApproximateHistogramAggregatorFactory(String name,
                                             String fieldName,
                                             Integer resolution,
                                             Integer numBuckets,
                                             Float lowerLimit,
                                             Float upperLimit)

Method Detail
- factorize
```
public Aggregator factorize(ColumnSelectorFactory metricFactory)
```
  Specified by:
  
  factorize in class AggregatorFactory
- factorizeBuffered
```
public BufferAggregator factorizeBuffered(ColumnSelectorFactory metricFactory)
```
  Specified by:
  
  factorizeBuffered in class AggregatorFactory
- getComparator
```
public Comparator getComparator()
```
  Specified by:
  
  getComparator in class AggregatorFactory
- combine
```
public Object combine(Object lhs,
                      Object rhs)
```
  Specified by:
  
  combine in class AggregatorFactory
- getCombiningFactory
```
public AggregatorFactory getCombiningFactory()
```
  Specified by:
  
  getCombiningFactory in class AggregatorFactory
- getMergingFactory
```
public AggregatorFactory getMergingFactory(AggregatorFactory other)
                                    throws AggregatorFactoryNotMergeableException
```
  Overrides:
  
  getMergingFactory in class AggregatorFactory
  
  Throws:
  
  AggregatorFactoryNotMergeableException
- getRequiredColumns
```
public List<AggregatorFactory> getRequiredColumns()
```
  Specified by:
  
  getRequiredColumns in class AggregatorFactory
- deserialize
```
public Object deserialize(Object object)
```
  Specified by:
  
  deserialize in class AggregatorFactory
- finalizeComputation
```
public Object finalizeComputation(Object object)
```
  Specified by:
  
  finalizeComputation in class AggregatorFactory
- getName
```
public String getName()
```
  Specified by:
  
  getName in class AggregatorFactory
- getFieldName
```
public String getFieldName()
```
- getResolution
```
public int getResolution()
```
- getLowerLimit
```
public float getLowerLimit()
```
- getUpperLimit
```
public float getUpperLimit()
```
- getNumBuckets
```
public int getNumBuckets()
```
- requiredFields
```
public List<String> requiredFields()
```
  Specified by:
  
  requiredFields in class AggregatorFactory
- getCacheKey
```
public byte[] getCacheKey()
```
  Specified by:
  
  getCacheKey in class AggregatorFactory
- getTypeName
```
public String getTypeName()
```
  Specified by:
  
  getTypeName in class AggregatorFactory
- getMaxIntermediateSize
```
public int getMaxIntermediateSize()
```
  Specified by:
  
  getMaxIntermediateSize in class AggregatorFactory
- getAggregatorStartValue
```
public Object getAggregatorStartValue()
```
  Specified by:
  
  getAggregatorStartValue in class AggregatorFactory
- equals
```
public boolean equals(Object o)
```
  Overrides:
  
  equals in class Object
- hashCode
```
public int hashCode()
```
  Overrides:
  
  hashCode in class Object
- toString
```
public String toString()
```
  Overrides:
  
  toString in class Object

Class ApproximateHistogramAggregatorFactory

Field Summary

Constructor Summary

Method Summary

Methods inherited from class io.druid.query.aggregation.AggregatorFactory

Methods inherited from class java.lang.Object

Field Detail

name

fieldName

resolution

numBuckets

lowerLimit

upperLimit

Constructor Detail

ApproximateHistogramAggregatorFactory

Method Detail

factorize

factorizeBuffered

getComparator

combine

getCombiningFactory

getMergingFactory

getRequiredColumns

deserialize

finalizeComputation

getName

getFieldName

getResolution

getLowerLimit

getUpperLimit

getNumBuckets

requiredFields

getCacheKey

getTypeName

getMaxIntermediateSize

getAggregatorStartValue

equals

hashCode

toString