com.espertech.esper.view.window

Class IStreamRandomAccess

java.lang.Object

com.espertech.esper.view.window.IStreamRandomAccess

All Implemented Interfaces:

ViewUpdatedCollection, RandomAccessByIndex

public class IStreamRandomAccess
extends Object
implements RandomAccessByIndex, ViewUpdatedCollection

For use with length and time window views that must provide random access into data window contents provided for the "previous" expression if used.

Constructor Summary

Constructors

Constructor and Description
IStreamRandomAccess(RandomAccessByIndexObserver updateObserver) Ctor.

Method Summary

Modifier and Type	Method and Description
void	destroy() De-allocate resources held by the collection.
EventBean	getNewData(int index) Returns an new data event given an index.
EventBean	getNewDataTail(int index)
int	getNumEventsInsertBuf()
EventBean	getOldData(int index) Returns an old data event given an index.
Collection<EventBean>	getWindowCollectionReadOnly()
int	getWindowCount()
Iterator<EventBean>	getWindowIterator()
boolean	isEmpty() Returns true for empty.
void	remove(EventBean oldData) Remove event.
void	update(EventBean newData) Apply event
void	update(EventBean[] newData, EventBean[] oldData) Accepts view insert and remove stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

IStreamRandomAccess

public IStreamRandomAccess(RandomAccessByIndexObserver updateObserver)

Ctor.

Parameters:

updateObserver - is invoked when updates are received

Method Detail

update

public void update(EventBean[] newData,
                   EventBean[] oldData)

Description copied from interface: ViewUpdatedCollection

Accepts view insert and remove stream.

Specified by:

update in interface ViewUpdatedCollection

Parameters:

newData - is the insert stream events or null if no data

oldData - is the remove stream events or null if no data

remove

public void remove(EventBean oldData)

Remove event.

Parameters:

oldData - event to remove

update

public void update(EventBean newData)

Apply event

Parameters:

newData - to apply

getNewData

public EventBean getNewData(int index)

Description copied from interface: RandomAccessByIndex

Returns an new data event given an index.

Specified by:

getNewData in interface RandomAccessByIndex

Parameters:

index - to return new data for

Returns:

new data event

getOldData

public EventBean getOldData(int index)

Description copied from interface: RandomAccessByIndex

Returns an old data event given an index.

Specified by:

getOldData in interface RandomAccessByIndex

Parameters:

index - to return old data for

Returns:

old data event

destroy

public void destroy()

Description copied from interface: ViewUpdatedCollection

De-allocate resources held by the collection.

Specified by:

destroy in interface ViewUpdatedCollection

isEmpty

public boolean isEmpty()

Returns true for empty.

Returns:

indicator

getNewDataTail

public EventBean getNewDataTail(int index)

Specified by:

getNewDataTail in interface RandomAccessByIndex

getWindowIterator

public Iterator<EventBean> getWindowIterator()

Specified by:

getWindowIterator in interface RandomAccessByIndex

getWindowCollectionReadOnly

public Collection<EventBean> getWindowCollectionReadOnly()

Specified by:

getWindowCollectionReadOnly in interface RandomAccessByIndex

getWindowCount

public int getWindowCount()

Specified by:

getWindowCount in interface RandomAccessByIndex

getNumEventsInsertBuf

public int getNumEventsInsertBuf()

Specified by:

getNumEventsInsertBuf in interface ViewUpdatedCollection