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

java.lang.Object
  com.espertech.esper.epl.join.table.PropertyIndexedEventTable
      com.espertech.esper.epl.join.table.PropertyIndexedEventTableUnique

All Implemented Interfaces:

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

public class PropertyIndexedEventTableUnique
extends PropertyIndexedEventTable
implements EventTableAsSet

Field Summary

protected java.util.Map<MultiKeyUntyped,EventBean>

propertyIndex

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

organization, propertyGetters

Constructor Summary

PropertyIndexedEventTableUnique(EventPropertyGetter[] propertyGetters, EventTableOrganization organization)

PropertyIndexedEventTableUnique(EventPropertyGetter[] propertyGetters, EventTableOrganization organization, java.util.Map<MultiKeyUntyped,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.
protected static EPException	handleUniqueIndexViolation(java.lang.String indexName, java.lang.Object key)
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[] keys) 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()

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

getMultiKey, getOrganization

Methods inherited from class java.lang.Object

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

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

getOrganization

Field Detail

propertyIndex

protected final java.util.Map<MultiKeyUntyped,EventBean> propertyIndex

Constructor Detail

PropertyIndexedEventTableUnique

public PropertyIndexedEventTableUnique(EventPropertyGetter[] propertyGetters,
                                       EventTableOrganization organization)

PropertyIndexedEventTableUnique

public PropertyIndexedEventTableUnique(EventPropertyGetter[] propertyGetters,
                                       EventTableOrganization organization,
                                       java.util.Map<MultiKeyUntyped,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 PropertyIndexedEventTable

Parameters:

newData - to add

oldData - to remove

add

public void add(EventBean[] events)

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 PropertyIndexedEventTable

Parameters:

events - to add

Throws:

java.lang.IllegalArgumentException - if the event was already existed in the index

remove

public void remove(EventBean[] events)

Remove events.

Specified by:

remove in interface EventTable

Overrides:

remove in class PropertyIndexedEventTable

Parameters:

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

Throws:

java.lang.IllegalArgumentException - when the event could not be removed as its not in the index

lookup

public java.util.Set<EventBean> lookup(java.lang.Object[] keys)

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

Overrides:

lookup in class PropertyIndexedEventTable

Parameters:

keys - to compare against

Returns:

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

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 PropertyIndexedEventTable

Parameters:

theEvent - to add

handleUniqueIndexViolation

protected static EPException handleUniqueIndexViolation(java.lang.String indexName,
                                                        java.lang.Object key)

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 PropertyIndexedEventTable

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 PropertyIndexedEventTable

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 PropertyIndexedEventTable

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 PropertyIndexedEventTable

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 PropertyIndexedEventTable

Returns:

number of events

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 PropertyIndexedEventTable

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 PropertyIndexedEventTable

Returns:

index object

toQueryPlan

public java.lang.String toQueryPlan()

Specified by:

toQueryPlan in interface EventTable

Overrides:

toQueryPlan in class PropertyIndexedEventTable

allValues

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

Specified by:

allValues in interface EventTableAsSet