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

Class PropertyHashedEventTableUnadorned

java.lang.Object

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

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

All Implemented Interfaces:

EventTable, Iterable<EventBean>

public class PropertyHashedEventTableUnadorned
extends PropertyHashedEventTable

Field Summary

Fields

Modifier and Type	Field	Description
protected final Map<Object,Set<EventBean>>	propertyIndex

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

factory

Constructor Summary

Constructors

Constructor	Description
PropertyHashedEventTableUnadorned(PropertyHashedEventTableFactory factory)

Method Summary

Modifier and Type	Method	Description
void	add(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext)	Add event to table.
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.
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.
Set<EventBean>	lookup(Object key)	Returns the set of events that have the same property value as the given event.
Set<EventBean>	lookupFAF(Object key)	Same as lookup except always returns a copy of the set
void	remove(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext)	Remove event from table.

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

add, addRemove, getKey, getMultiKeyTransform, getOrganization, remove, 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

Field Details

propertyIndex

protected final Map<Object,Set<EventBean>> propertyIndex

Constructor Details

PropertyHashedEventTableUnadorned

public PropertyHashedEventTableUnadorned(PropertyHashedEventTableFactory factory)

Method Details

lookup

public Set<EventBean> lookup(Object key)

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

Specified by:

lookup in class PropertyHashedEventTable

Parameters:

key - to compare against

Returns:

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

lookupFAF

public Set<EventBean> lookupFAF(Object key)

Same as lookup except always returns a copy of the set

Specified by:

lookupFAF in class PropertyHashedEventTable

Parameters:

key - key

Returns:

copy

add

public void add(EventBean theEvent,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Add event to table.

Parameters:

theEvent - to add

exprEvaluatorContext - evaluator context

remove

public void remove(EventBean theEvent,
 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: EventTable

Remove event from table.

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.

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.

Returns:

table iterator

clear

public void clear()

Description copied from interface: EventTable

Clear out index.

destroy

public void destroy()

Description copied from interface: EventTable

Destroy index.

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

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.

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

Returns:

index object

getProviderClass

public Class<?> getProviderClass()