com.espertech.esper.epl.join.table

Class PropertySortedEventTableImpl

java.lang.Object

com.espertech.esper.epl.join.table.PropertySortedEventTable

com.espertech.esper.epl.join.table.PropertySortedEventTableImpl

All Implemented Interfaces:

EventTable, Iterable<EventBean>

Direct Known Subclasses:

PropertySortedEventTableCoerced

public class PropertySortedEventTableImpl
extends PropertySortedEventTable

Index that organizes events by the event property values into a single TreeMap sortable non-nested index with Object keys that store the property values.

Field Summary

Fields

Modifier and Type	Field and Description
protected HashSet<EventBean>	nullKeyedValues
protected TreeMap<Object,Set<EventBean>>	propertyIndex Index table.

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

organization, propertyGetter

Constructor Summary

Constructors

Constructor and Description
PropertySortedEventTableImpl(EventPropertyGetter propertyGetter, EventTableOrganization organization)

Method Summary

Modifier and Type	Method and Description
void	add(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext) Add event to table.
void	clear() Clear out index.
protected Object	coerce(Object value)
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>	lookupConstants(RangeIndexLookupValue lookupValueBase)
Set<EventBean>	lookupGreater(Object keyStart)
Collection<EventBean>	lookupGreaterColl(Object keyStart)
Set<EventBean>	lookupGreaterEqual(Object keyStart)
Collection<EventBean>	lookupGreaterEqualColl(Object keyStart)
Set<EventBean>	lookupLess(Object keyStart)
Set<EventBean>	lookupLessEqual(Object keyStart)
Collection<EventBean>	lookupLessEqualColl(Object keyStart)
Collection<EventBean>	lookupLessThenColl(Object keyStart)
Set<EventBean>	lookupRange(Object keyStart, boolean includeStart, Object keyEnd, boolean includeEnd, boolean allowRangeReversal) Returns the set of events that have the same property value as the given event.
Collection<EventBean>	lookupRangeColl(Object keyStart, boolean includeStart, Object keyEnd, boolean includeEnd, boolean allowRangeReversal)
Set<EventBean>	lookupRangeInverted(Object keyStart, boolean includeStart, Object keyEnd, boolean includeEnd)
Collection<EventBean>	lookupRangeInvertedColl(Object keyStart, boolean includeStart, Object keyEnd, boolean includeEnd)
void	remove(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext) Remove event from table.

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

add, addRemove, getIndexedValue, getOrganization, normalize, normalize, normalizeCollection, normalizeCollection, remove, toQueryPlan

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

propertyIndex

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

Index table.

nullKeyedValues

protected final HashSet<EventBean> nullKeyedValues

Constructor Detail

PropertySortedEventTableImpl

public PropertySortedEventTableImpl(EventPropertyGetter propertyGetter,
                                    EventTableOrganization organization)

Method Detail

coerce

protected Object coerce(Object value)

lookupRange

public Set<EventBean> lookupRange(Object keyStart,
                                  boolean includeStart,
                                  Object keyEnd,
                                  boolean includeEnd,
                                  boolean allowRangeReversal)

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

Specified by:

lookupRange in class PropertySortedEventTable

Parameters:

keyStart - to compare against

keyEnd - to compare against

allowRangeReversal - indicate whether "a between 60 and 50" should return no results (equivalent to a>= X and a <=Y) or should return results (equivalent to 'between' and 'in'

Returns:

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

lookupRangeColl

public Collection<EventBean> lookupRangeColl(Object keyStart,
                                             boolean includeStart,
                                             Object keyEnd,
                                             boolean includeEnd,
                                             boolean allowRangeReversal)

Specified by:

lookupRangeColl in class PropertySortedEventTable

lookupRangeInverted

public Set<EventBean> lookupRangeInverted(Object keyStart,
                                          boolean includeStart,
                                          Object keyEnd,
                                          boolean includeEnd)

Specified by:

lookupRangeInverted in class PropertySortedEventTable

lookupRangeInvertedColl

public Collection<EventBean> lookupRangeInvertedColl(Object keyStart,
                                                     boolean includeStart,
                                                     Object keyEnd,
                                                     boolean includeEnd)

Specified by:

lookupRangeInvertedColl in class PropertySortedEventTable

lookupLess

public Set<EventBean> lookupLess(Object keyStart)

Specified by:

lookupLess in class PropertySortedEventTable

lookupLessThenColl

public Collection<EventBean> lookupLessThenColl(Object keyStart)

Specified by:

lookupLessThenColl in class PropertySortedEventTable

lookupLessEqual

public Set<EventBean> lookupLessEqual(Object keyStart)

Specified by:

lookupLessEqual in class PropertySortedEventTable

lookupLessEqualColl

public Collection<EventBean> lookupLessEqualColl(Object keyStart)

Specified by:

lookupLessEqualColl in class PropertySortedEventTable

lookupGreaterEqual

public Set<EventBean> lookupGreaterEqual(Object keyStart)

Specified by:

lookupGreaterEqual in class PropertySortedEventTable

lookupGreaterEqualColl

public Collection<EventBean> lookupGreaterEqualColl(Object keyStart)

Specified by:

lookupGreaterEqualColl in class PropertySortedEventTable

lookupGreater

public Set<EventBean> lookupGreater(Object keyStart)

Specified by:

lookupGreater in class PropertySortedEventTable

lookupGreaterColl

public Collection<EventBean> lookupGreaterColl(Object keyStart)

Specified by:

lookupGreaterColl in class PropertySortedEventTable

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

Overrides:

getNumberOfEvents in class PropertySortedEventTable

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

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.

lookupConstants

public Set<EventBean> lookupConstants(RangeIndexLookupValue lookupValueBase)

Specified by:

lookupConstants in class PropertySortedEventTable

getProviderClass

public Class getProviderClass()