com.espertech.esper.epl.join.table
Class PropertyIndexedEventTableSingleUnique

java.lang.Object
  com.espertech.esper.epl.join.table.PropertyIndexedEventTableSingle
      com.espertech.esper.epl.join.table.PropertyIndexedEventTableSingleUnique

All Implemented Interfaces:

EventTable, EventTableAsSet, java.lang.Iterable<EventBean>

public class PropertyIndexedEventTableSingleUnique
extends PropertyIndexedEventTableSingle
implements EventTableAsSet

Unique index.

Field Summary

Fields inherited from class com.espertech.esper.epl.join.table.PropertyIndexedEventTableSingle

organization, propertyGetter

Constructor Summary

PropertyIndexedEventTableSingleUnique(EventPropertyGetter propertyGetter, EventTableOrganization organization)

PropertyIndexedEventTableSingleUnique(EventPropertyGetter propertyGetter, EventTableOrganization organization, java.util.Map<java.lang.Object,EventBean> propertyIndex)

Method Summary

void	add(EventBean theEvent) Add event to table.
void	add(EventBean[] events) Add an array of events.
void	addRemove(EventBean[] newData, EventBean[] oldData) Remove then add events.
java.util.Set<EventBean>	allValues()
void	clear() Clear out index.
java.lang.Object	getIndex() Return the index object itself, or an object-array for multiple index structures.
java.lang.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.
int	getNumKeys() If the index retains events using some key-based organization this returns the number of keys, and may return null to indicate that either the number of keys is not available or costly to obtain.
boolean	isEmpty() Returns true if the index is empty, or false if not
java.util.Iterator<EventBean>	iterator() Returns an iterator over events in the table.
java.util.Set<EventBean>	lookup(java.lang.Object key) Returns the set of events that have the same property value as the given event.
void	remove(EventBean theEvent) Remove event from table.
void	remove(EventBean[] events) Remove events.
java.lang.String	toQueryPlan()
java.lang.String	toString()

Methods inherited from class com.espertech.esper.epl.join.table.PropertyIndexedEventTableSingle

getKey, getOrganization

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.epl.join.table.EventTable

getOrganization

Constructor Detail

PropertyIndexedEventTableSingleUnique

public PropertyIndexedEventTableSingleUnique(EventPropertyGetter propertyGetter,
                                             EventTableOrganization organization)

PropertyIndexedEventTableSingleUnique

public PropertyIndexedEventTableSingleUnique(EventPropertyGetter propertyGetter,
                                             EventTableOrganization organization,
                                             java.util.Map<java.lang.Object,EventBean> propertyIndex)

Method Detail

addRemove

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

Remove then add events.

Specified by:

addRemove in interface EventTable

Overrides:

addRemove in class PropertyIndexedEventTableSingle

Parameters:

newData - to add

oldData - to remove

add

public void add(EventBean[] events)

Description copied from class: PropertyIndexedEventTableSingle

Add an array of events. Same event instance is not added twice. Event properties should be immutable. Allow null passed instead of an empty array.

Specified by:

add in interface EventTable

Overrides:

add in class PropertyIndexedEventTableSingle

Parameters:

events - to add

remove

public void remove(EventBean[] events)

Description copied from class: PropertyIndexedEventTableSingle

Remove events.

Specified by:

remove in interface EventTable

Overrides:

remove in class PropertyIndexedEventTableSingle

Parameters:

events - to be removed, can be null instead of an empty array.

lookup

public java.util.Set<EventBean> lookup(java.lang.Object key)

Description copied from class: PropertyIndexedEventTableSingle

Returns the set of events that have the same property value as the given event.

Overrides:

lookup in class PropertyIndexedEventTableSingle

Parameters:

key - to compare against

Returns:

set of events with property value, or null if none found (never returns zero-sized set)

getNumKeys

public int getNumKeys()

Description copied from interface: EventTable

If the index retains events using some key-based organization this returns the number of keys, and may return null to indicate that either the number of keys is not available or costly to obtain.

The number returned can be an estimate and may not be accurate.

Specified by:

getNumKeys in interface EventTable

Overrides:

getNumKeys in class PropertyIndexedEventTableSingle

Returns:

number of events

getIndex

public java.lang.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

Specified by:

getIndex in interface EventTable

Overrides:

getIndex in class PropertyIndexedEventTableSingle

Returns:

index object

add

public void add(EventBean theEvent)

Description copied from interface: EventTable

Add event to table.

Specified by:

add in interface EventTable

Overrides:

add in class PropertyIndexedEventTableSingle

Parameters:

theEvent - to add

remove

public void remove(EventBean theEvent)

Description copied from interface: EventTable

Remove event from table.

Specified by:

remove in interface EventTable

Overrides:

remove in class PropertyIndexedEventTableSingle

Parameters:

theEvent - to remove

isEmpty

public boolean isEmpty()

Description copied from interface: EventTable

Returns true if the index is empty, or false if not

Specified by:

isEmpty in interface EventTable

Overrides:

isEmpty in class PropertyIndexedEventTableSingle

Returns:

true for empty index

iterator

public java.util.Iterator<EventBean> iterator()

Description copied from interface: EventTable

Returns an iterator over events in the table.

Specified by:

iterator in interface EventTable

Specified by:

iterator in interface java.lang.Iterable<EventBean>

Overrides:

iterator in class PropertyIndexedEventTableSingle

Returns:

table iterator

clear

public void clear()

Description copied from interface: EventTable

Clear out index.

Specified by:

clear in interface EventTable

Overrides:

clear in class PropertyIndexedEventTableSingle

toString

public java.lang.String toString()

Overrides:

toString in class PropertyIndexedEventTableSingle

getNumberOfEvents

public java.lang.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.

Specified by:

getNumberOfEvents in interface EventTable

Overrides:

getNumberOfEvents in class PropertyIndexedEventTableSingle

Returns:

number of events

toQueryPlan

public java.lang.String toQueryPlan()

Specified by:

toQueryPlan in interface EventTable

Overrides:

toQueryPlan in class PropertyIndexedEventTableSingle

allValues

public java.util.Set<EventBean> allValues()

Specified by:

allValues in interface EventTableAsSet