Package org.apache.datasketches.kll

Class KllSketchIterator

java.lang.Object

org.apache.datasketches.kll.KllSketchIterator

All Implemented Interfaces:

QuantilesSketchIterator

Direct Known Subclasses:

KllDoublesSketchIterator, KllFloatsSketchIterator, KllItemsSketchIterator, KllLongsSketchIterator

public class KllSketchIterator
extends Object
implements QuantilesSketchIterator

The base implementation for the KLL sketch iterator hierarchy used for viewing the non-ordered quantiles retained by a sketch.

Prototype example of the recommended iteration loop:

   SketchIterator itr = sketch.iterator();
   while (itr.next()) {
     ...get*();
   }
 

Author:

Lee Rhodes

Method Summary

Modifier and Type	Method	Description
long	getWeight()	Gets the natural weight at the current index.
boolean	next()	Advances the index and checks if it is valid.

Methods inherited from class java.lang.Object

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

Method Details

getWeight

public long getWeight()

Description copied from interface: QuantilesSketchIterator

Gets the natural weight at the current index.

Don't call this before calling next() for the first time or after getting false from next().

Specified by:

getWeight in interface QuantilesSketchIterator

Returns:

the natural weight at the current index.

next

public boolean next()

Description copied from interface: QuantilesSketchIterator

Advances the index and checks if it is valid. The state of this iterator is undefined before the first call of this method.

Specified by:

next in interface QuantilesSketchIterator

Returns:

true if the next index is valid.