Package com.espertech.esper.common.internal.epl.index.unindexed

Class UnindexedEventTableImpl

java.lang.Object

com.espertech.esper.common.internal.epl.index.unindexed.UnindexedEventTable

com.espertech.esper.common.internal.epl.index.unindexed.UnindexedEventTableImpl

All Implemented Interfaces:

EventTable, Iterable<EventBean>

public class UnindexedEventTableImpl
extends UnindexedEventTable

Simple table of events without an index.

Constructor Summary

Constructors

Constructor	Description
UnindexedEventTableImpl(int streamNum)	Ctor.

Method Summary

Modifier and Type	Method	Description
void	add(EventBean[] events, ExprEvaluatorContext exprEvaluatorContext)	Add events to table.
void	add(EventBean event, ExprEvaluatorContext exprEvaluatorContext)	Add event to table.
void	addRemove(EventBean[] newData, EventBean[] oldData, ExprEvaluatorContext exprEvaluatorContext)	Add and remove events from table.
void	clear()	Clear out index.
void	destroy()	Destroy index.
Set<EventBean>	getEventSet()	Returns events in table.
Object	getIndex()	Return the index object itself, or an object-array for multiple index structures.
Integer	getNumberOfEvents()	If the number of events is readily available, an implementation will return that number or it may return null to indicate that the count is not readily available.
Class	getProviderClass()
boolean	isEmpty()	Returns true if the index is definitely empty, or false if is not definitely empty but we can not certain.
Iterator<EventBean>	iterator()	Returns an iterator over events in the table.
void	remove(EventBean[] events, ExprEvaluatorContext exprEvaluatorContext)	Remove events from table.
void	remove(EventBean event, ExprEvaluatorContext exprEvaluatorContext)	Remove event from table.

Methods inherited from class com.espertech.esper.common.internal.epl.index.unindexed.UnindexedEventTable

getNumKeys, getOrganization, toQueryPlan, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

UnindexedEventTableImpl

public UnindexedEventTableImpl(int streamNum)

Ctor.

Parameters:

streamNum - is the indexed stream's number

Method Details

clear

public void clear()

Description copied from interface: EventTable

Clear out index.

destroy

public void destroy()

Description copied from interface: EventTable

Destroy index.

addRemove

public void addRemove(EventBean[] newData,
 EventBean[] oldData,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Add and remove events from table.

It is up to the index to decide whether to add first and then remove, or whether to remove and then add.

It is important to note that a given event can be in both the removed and the added events. This means that unique indexes probably need to remove first and then add. Most other non-unique indexes will add first and then remove since the an event can be both in the add and the remove stream.

Parameters:

newData - to add

oldData - to remove

exprEvaluatorContext - evaluator context

add

public void add(EventBean[] events,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Add events to table.

Parameters:

events - to add

exprEvaluatorContext - evaluator context

remove

public void remove(EventBean[] events,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Remove events from table.

Parameters:

events - to remove

exprEvaluatorContext - evaluator context

add

public void add(EventBean event,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Add event to table.

Parameters:

event - to add

exprEvaluatorContext - evaluator context

remove

public void remove(EventBean event,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Remove event from table.

Parameters:

event - to remove

exprEvaluatorContext - evaluator context

isEmpty

public boolean isEmpty()

Description copied from interface: EventTable

Returns true if the index is definitely empty, or false if is not definitely empty but we can not certain.

Returns:

true for definitely empty index, false for there-may-be-rows and please-check-by-iterating

getEventSet

public Set<EventBean> getEventSet()

Returns events in table.

Specified by:

getEventSet in class UnindexedEventTable

Returns:

all events

iterator

public Iterator<EventBean> iterator()

Description copied from interface: EventTable

Returns an iterator over events in the table. Not required to be implemented for all indexes. Full table scans and providers that have easy access to an iterator may implement.

Returns:

table iterator

getNumberOfEvents

public Integer getNumberOfEvents()

Description copied from interface: EventTable

If the number of events is readily available, an implementation will return that number or it may return null to indicate that the count is not readily available.

Returns:

number of events

getIndex

public Object getIndex()

Description copied from interface: EventTable

Return the index object itself, or an object-array for multiple index structures.

May return null if the information is not readily available, i.e. externally maintained index

Returns:

index object

getProviderClass

public Class getProviderClass()