Class TriggerEventActivator

java.lang.Object

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

public class TriggerEventActivator
extends Object

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

Field Summary

Fields

Modifier and Type	Field	Description
private Activation	activation
private ConnectionContext	cc
private int	dmlType
private GenericTriggerExecutor[][]	executors
private LanguageConnectionContext	lcc
private String	statementText
private UUID	tableId
private String	tableName
private InternalTriggerExecutionContext	tec
private TriggerInfo	triggerInfo

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
void	cleanup()	Clean up and release resources.
void	notifyEvent(TriggerEvent event, CursorResultSet brs, CursorResultSet ars, int[] colsReadFromTable)	Handle the given event.
(package private) void	reopen()	Reopen the trigger activator.
private void	setupExecutors(TriggerInfo triggerInfo)

Methods inherited from class Object

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

Field Details

lcc

private LanguageConnectionContext lcc

triggerInfo

private TriggerInfo triggerInfo

tec

private InternalTriggerExecutionContext tec

executors

private GenericTriggerExecutor[][] executors

activation

private Activation activation

cc

private ConnectionContext cc

statementText

private String statementText

dmlType

private int dmlType

tableId

private UUID tableId

tableName

private String tableName

Constructor Details

TriggerEventActivator

public TriggerEventActivator(LanguageConnectionContext lcc,
 UUID tableId,
 TriggerInfo triggerInfo,
 int dmlType,
 Activation activation,
 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 Details

reopen

void reopen()
     throws StandardException

Reopen the trigger activator. Just creates a new trigger execution context. Note that close() still must be called when you are done -- you cannot just do a reopen() w/o a first doing a close.

Throws:

StandardException - on error

setupExecutors

private void setupExecutors(TriggerInfo triggerInfo)
                     throws StandardException

Throws:

StandardException

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