com.espertech.esper.epl.join.base

Class JoinPreloadMethodNull

java.lang.Object

com.espertech.esper.epl.join.base.JoinPreloadMethodNull

All Implemented Interfaces:

JoinPreloadMethod

public class JoinPreloadMethodNull
extends Object
implements JoinPreloadMethod

Implements a method for pre-loading (initializing) join that does not return any events.

Constructor Summary

Constructors

Constructor and Description
JoinPreloadMethodNull() Ctor.

Method Summary

Modifier and Type	Method and Description
boolean	isPreloading()
void	preloadAggregation(ResultSetProcessor resultSetProcessor) Initialize the result set process for the purpose of grouping and aggregation from the join result set.
void	preloadFromBuffer(int stream, ExprEvaluatorContext exprEvaluatorContext) Initialize a stream from the stream buffers data.
void	setBuffer(BufferView buffer, int i) Sets the buffee to use.

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinPreloadMethodNull

public JoinPreloadMethodNull()

Ctor.

Method Detail

preloadFromBuffer

public void preloadFromBuffer(int stream,
                              ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: JoinPreloadMethod

Initialize a stream from the stream buffers data.

Specified by:

preloadFromBuffer in interface JoinPreloadMethod

Parameters:

stream - to initialize and load indexes

exprEvaluatorContext - evaluator context

preloadAggregation

public void preloadAggregation(ResultSetProcessor resultSetProcessor)

Description copied from interface: JoinPreloadMethod

Initialize the result set process for the purpose of grouping and aggregation from the join result set.

Specified by:

preloadAggregation in interface JoinPreloadMethod

Parameters:

resultSetProcessor - is the grouping and aggregation result processing

setBuffer

public void setBuffer(BufferView buffer,
                      int i)

Description copied from interface: JoinPreloadMethod

Sets the buffee to use.

Specified by:

setBuffer in interface JoinPreloadMethod

Parameters:

buffer - buffer to use

i - stream

isPreloading

public boolean isPreloading()

Specified by:

isPreloading in interface JoinPreloadMethod