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

java.lang.Object
  com.espertech.esper.epl.join.table.PropertyCompositeEventTable
      com.espertech.esper.epl.join.table.PropertyCompositeEventTableImpl

All Implemented Interfaces:

EventTable, java.lang.Iterable<EventBean>

public class PropertyCompositeEventTableImpl
extends PropertyCompositeEventTable

For use when the index comprises of either two or more ranges or a unique key in combination with a range. Organizes into a TreeMap>, for short. The top level can also be just Map. Expected at least either (A) one key and one range or (B) zero keys and 2 ranges.

An alternative implementatation could have been based on "TreeMap>>", however the following implication arrive - not applicable for range-only lookups (since there the key can be the value itself - not applicable for multiple nested range as ordering not nested - each add/remove and lookup would also need to construct a key object.

Field Summary

protected java.util.Map<java.lang.Object,java.lang.Object>

index Index table (sorted and/or keyed, always nested).

Constructor Summary

PropertyCompositeEventTableImpl(java.lang.Class[] optKeyCoercedTypes, java.lang.Class[] optRangeCoercedTypes, EventTableOrganization organization, boolean isHashKeyed, CompositeIndexEnterRemove chain)

Method Summary

void	add(EventBean theEvent) Add event to table.
void	clear() Clear out index.
void	destroy() Destroy index.
java.util.Map<java.lang.Object,java.lang.Object>	getIndex() Return the index object itself, or an object-array for multiple index structures.
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.
CompositeIndexQueryResultPostProcessor	getPostProcessor()
java.lang.Class	getProviderClass()
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.
void	remove(EventBean theEvent) Remove event from table.

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

add, addRemove, getNumberOfEvents, getOptKeyCoercedTypes, getOptRangeCoercedTypes, getOrganization, remove, toQueryPlan, toString

Methods inherited from class java.lang.Object

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

Field Detail

index

protected final java.util.Map<java.lang.Object,java.lang.Object> index

Index table (sorted and/or keyed, always nested).

Constructor Detail

PropertyCompositeEventTableImpl

public PropertyCompositeEventTableImpl(java.lang.Class[] optKeyCoercedTypes,
                                       java.lang.Class[] optRangeCoercedTypes,
                                       EventTableOrganization organization,
                                       boolean isHashKeyed,
                                       CompositeIndexEnterRemove chain)

Method Detail

getIndex

public java.util.Map<java.lang.Object,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

Specified by:

getIndex in class PropertyCompositeEventTable

Returns:

index object

add

public void add(EventBean theEvent)

Description copied from interface: EventTable

Add event to table.

Parameters:

theEvent - to add

remove

public void remove(EventBean theEvent)

Description copied from interface: EventTable

Remove event from table.

Parameters:

theEvent - to remove

isEmpty

public boolean isEmpty()

Description copied from interface: EventTable

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

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.

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.

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.

Returns:

number of events

getProviderClass

public java.lang.Class getProviderClass()

getPostProcessor

public CompositeIndexQueryResultPostProcessor getPostProcessor()

Specified by:

getPostProcessor in class PropertyCompositeEventTable