org.apache.derby.impl.sql.execute

Class TriggerEventActivator

java.lang.Object

org.apache.derby.impl.sql.execute.TriggerEventActivator

public class TriggerEventActivator
extends java.lang.Object

Responsible for firing a trigger or set of triggers based on an event.

Constructor Summary

Constructors

Constructor and Description
TriggerEventActivator(LanguageConnectionContext lcc, UUID tableId, TriggerInfo triggerInfo, int dmlType, Activation activation, java.util.Vector<AutoincrementCounter> aiCounters) Basic constructor

Method Summary

Modifier and Type	Method and Description
void	cleanup() Clean up and release resources.
void	notifyEvent(TriggerEvent event, CursorResultSet brs, CursorResultSet ars, int[] colsReadFromTable) Handle the given event.

Methods inherited from class java.lang.Object

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

Constructor Detail

TriggerEventActivator

public TriggerEventActivator(LanguageConnectionContext lcc,
                             UUID tableId,
                             TriggerInfo triggerInfo,
                             int dmlType,
                             Activation activation,
                             java.util.Vector<AutoincrementCounter> aiCounters)
                      throws StandardException

Basic constructor

Parameters:

lcc - the lcc

triggerInfo - the trigger information

dmlType - Type of DML for which this trigger is being fired.

activation - the activation.

aiCounters - vector of ai counters

Throws:

StandardException - on error

Method Detail

notifyEvent

public void notifyEvent(TriggerEvent event,
                        CursorResultSet brs,
                        CursorResultSet ars,
                        int[] colsReadFromTable)
                 throws StandardException

Handle the given event.

Parameters:

event - a trigger event

brs - the before result set. Typically a TemporaryRowHolderResultSet but sometimes a BulkTableScanResultSet

ars - the after result set. Typically a TemporaryRowHolderResultSet but sometimes a BulkTableScanResultSet

colsReadFromTable - columns required from the trigger table by the triggering sql

Throws:

StandardException - on error

cleanup

public void cleanup()
             throws StandardException

Clean up and release resources.

Throws:

StandardException - on unexpected error