Package com.espertech.esper.common.client.util

Class CountMinSketchAgentStringUTF16

java.lang.Object

com.espertech.esper.common.client.util.CountMinSketchAgentStringUTF16

All Implemented Interfaces:

CountMinSketchAgent

public class CountMinSketchAgentStringUTF16
extends Object
implements CountMinSketchAgent

Count-min sketch agent that handles String-type values and uses UTF-16 encoding to transform strings to byte-array and back.

Field Summary

Fields

Modifier and Type	Field	Description
static final EPTypeClass	EPTYPE	Type information

Constructor Summary

Constructors

Constructor	Description
CountMinSketchAgentStringUTF16()

Method Summary

Modifier and Type	Method	Description
void	add(CountMinSketchAgentContextAdd ctx)	Add a value to the Count-min sketch.
Long	estimate(CountMinSketchAgentContextEstimate ctx)	Return the estimated count for a given value.
Object	fromBytes(CountMinSketchAgentContextFromBytes ctx)	Return the value object for a given byte-array, for use with top-K.

Methods inherited from class java.lang.Object

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

Field Details

EPTYPE

public static final EPTypeClass EPTYPE

Type information

Constructor Details

CountMinSketchAgentStringUTF16

public CountMinSketchAgentStringUTF16()

Method Details

add

public void add(CountMinSketchAgentContextAdd ctx)

Description copied from interface: CountMinSketchAgent

Add a value to the Count-min sketch. Implementations typically check for null value, convert the value object to a byte-array and invoke a method on the state object to add the byte-array value.

Specified by:

add in interface CountMinSketchAgent

Parameters:

ctx - contains value to add as well as the state

estimate

public Long estimate(CountMinSketchAgentContextEstimate ctx)

Description copied from interface: CountMinSketchAgent

Return the estimated count for a given value. Implementations typically check for null value, convert the value object to a byte-array and invoke a method on the state object to retrieve a count.

Specified by:

estimate in interface CountMinSketchAgent

Parameters:

ctx - contains value to query as well as the state

Returns:

estimated count

fromBytes

public Object fromBytes(CountMinSketchAgentContextFromBytes ctx)

Description copied from interface: CountMinSketchAgent

Return the value object for a given byte-array, for use with top-K. Implementations typically simply convert a byte-array into a value object.

Specified by:

fromBytes in interface CountMinSketchAgent

Parameters:

ctx - value object and state

Returns:

value object