Package org.h2.samples

Class TriggerSample.MyTrigger

java.lang.Object

org.h2.samples.TriggerSample.MyTrigger

All Implemented Interfaces:

Trigger

Enclosing class:

TriggerSample

public static class TriggerSample.MyTrigger
extends Object
implements Trigger

This class is a simple trigger implementation.

Field Summary

Fields inherited from interface org.h2.api.Trigger

DELETE, INSERT, SELECT, UPDATE

Constructor Summary

Constructors

Constructor	Description
MyTrigger()

Method Summary

Modifier and Type	Method	Description
void	close()	This method is called when the database is closed.
void	fire(Connection conn, Object[] oldRow, Object[] newRow)	This method is called for each triggered action.
void	init(Connection conn, String schemaName, String triggerName, String tableName, boolean before, int type)	Initializes the trigger.
void	remove()	This method is called when the trigger is dropped.

Methods inherited from class java.lang.Object

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

Constructor Details

MyTrigger

public MyTrigger()

Method Details

init

public void init(Connection conn,
 String schemaName,
 String triggerName,
 String tableName,
 boolean before,
 int type)

Initializes the trigger.

Specified by:

init in interface Trigger

Parameters:

conn - a connection to the database

schemaName - the name of the schema

triggerName - the name of the trigger used in the CREATE TRIGGER statement

tableName - the name of the table

before - whether the fire method is called before or after the operation is performed

type - the operation type: INSERT, UPDATE, or DELETE

fire

public void fire(Connection conn,
 Object[] oldRow,
 Object[] newRow)
          throws SQLException

This method is called for each triggered action.

Specified by:

fire in interface Trigger

Parameters:

conn - a connection to the database

oldRow - the old row, or null if no old row is available (for INSERT)

newRow - the new row, or null if no new row is available (for DELETE)

Throws:

SQLException - if the operation must be undone

close

public void close()

Description copied from interface: Trigger

This method is called when the database is closed. If the method throws an exception, it will be logged, but closing the database will continue.

Specified by:

close in interface Trigger

remove

public void remove()

Description copied from interface: Trigger

This method is called when the trigger is dropped.

Specified by:

remove in interface Trigger