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

Class PropertyHashedEventTableUnique

java.lang.Object

com.espertech.esper.common.internal.epl.index.hash.PropertyHashedEventTable

com.espertech.esper.common.internal.epl.index.hash.PropertyHashedEventTableUnique

All Implemented Interfaces:

EventTable, EventTableAsSet, Iterable<EventBean>

public class PropertyHashedEventTableUnique
extends PropertyHashedEventTable
implements EventTableAsSet

Unique index.

Field Summary

Fields inherited from class com.espertech.esper.common.internal.epl.index.hash.PropertyHashedEventTable

factory

Constructor Summary

Constructors

Constructor	Description
PropertyHashedEventTableUnique(PropertyHashedEventTableFactory factory)

Method Summary

Modifier and Type	Method	Description
void	add(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext)	Add event to table.
void	addRemove(EventBean[] newData, EventBean[] oldData, ExprEvaluatorContext exprEvaluatorContext)	Remove then add events.
Set<EventBean>	allValues()
void	clear()	Clear out index.
void	destroy()	Destroy index.
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.
int	getNumKeys()	If the index retains events using some key-based organization this returns the number of keys, and may return -1 to indicate that either the number of keys is not available or costly to obtain.
Map<Object,EventBean>	getPropertyIndex()
Class	getProviderClass()
static EPException	handleUniqueIndexViolation(String indexName, Object key)
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.
Set<EventBean>	lookup(Object key)
Set<EventBean>	lookupFAF(Object key)
void	remove(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext)	Remove event from table.
String	toString()

Methods inherited from class com.espertech.esper.common.internal.epl.index.hash.PropertyHashedEventTable

add, getKey, getMultiKeyTransform, getOrganization, remove, toQueryPlan

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.common.internal.epl.index.base.EventTable

add, getOrganization, remove, toQueryPlan

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

PropertyHashedEventTableUnique

public PropertyHashedEventTableUnique(PropertyHashedEventTableFactory factory)

Method Details

lookup

public Set<EventBean> lookup(Object key)

Specified by:

lookup in class PropertyHashedEventTable

lookupFAF

public Set<EventBean> lookupFAF(Object key)

Specified by:

lookupFAF in class PropertyHashedEventTable

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 -1 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

Returns:

number of keys

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

Specified by:

getIndex in interface EventTable

Returns:

index object

addRemove

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

Remove then add events.

Specified by:

addRemove in interface EventTable

Overrides:

addRemove in class PropertyHashedEventTable

Parameters:

newData - to add

oldData - to remove

exprEvaluatorContext - evaluator context

add

public void add(EventBean theEvent,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Add event to table.

Specified by:

add in interface EventTable

Parameters:

theEvent - to add

exprEvaluatorContext - evaluator context

remove

public void remove(EventBean theEvent,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Remove event from table.

Specified by:

remove in interface EventTable

Parameters:

theEvent - 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.

Specified by:

isEmpty in interface EventTable

Returns:

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

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.

Specified by:

iterator in interface EventTable

Specified by:

iterator in interface Iterable<EventBean>

Returns:

table iterator

clear

public void clear()

Description copied from interface: EventTable

Clear out index.

Specified by:

clear in interface EventTable

destroy

public void destroy()

Description copied from interface: EventTable

Destroy index.

Specified by:

destroy in interface EventTable

toString

public String toString()

Overrides:

toString in class PropertyHashedEventTable

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.

Specified by:

getNumberOfEvents in interface EventTable

Returns:

number of events

allValues

public Set<EventBean> allValues()

Specified by:

allValues in interface EventTableAsSet

getProviderClass

public Class getProviderClass()

Specified by:

getProviderClass in interface EventTable

getPropertyIndex

public Map<Object,EventBean> getPropertyIndex()

handleUniqueIndexViolation

public static EPException handleUniqueIndexViolation(String indexName,
 Object key)