org.h2.schema

Class TriggerObject

java.lang.Object

org.h2.engine.DbObjectBase

org.h2.schema.SchemaObjectBase

org.h2.schema.TriggerObject

All Implemented Interfaces:

DbObject, SchemaObject

public class TriggerObject
extends SchemaObjectBase

A trigger is created using the statement CREATE TRIGGER

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_QUEUE_SIZE The default queue size.

Fields inherited from class org.h2.engine.DbObjectBase

comment, database, trace

Fields inherited from interface org.h2.engine.DbObject

AGGREGATE, COMMENT, CONSTANT, CONSTRAINT, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, SYNONYM, TABLE_OR_VIEW, TRIGGER, USER, USER_DATATYPE

Constructor Summary

Constructors

Constructor and Description
TriggerObject(Schema schema, int id, java.lang.String name, Table table)

Method Summary

Methods

Modifier and Type	Method and Description
void	checkRename() Check if this object can be renamed.
void	close() Close the trigger.
void	fire(Session session, int type, boolean beforeAction) Call the trigger class if required.
boolean	fireRow(Session session, Table table, Row oldRow, Row newRow, boolean beforeAction, boolean rollback) Call the fire method of the user-defined trigger class if required.
java.lang.String	getCreateSQL() Build a SQL statement to re-create this object.
java.lang.String	getCreateSQLForCopy(Table targetTable, java.lang.String quotedName) Build a SQL statement to re-create the object, or to create a copy of the object with a different name or referencing a different table
java.lang.String	getDropSQL() Build a SQL statement to drop this object.
int	getQueueSize()
Table	getTable() Get the table of this trigger.
java.lang.String	getTriggerClassName() Get the trigger class name.
java.lang.String	getTriggerSource()
int	getType() Get the object type.
java.lang.String	getTypeNameList()
boolean	isBefore() Check if this is a before trigger.
boolean	isNoWait()
boolean	isSelectTrigger() Check whether this is a select trigger.
void	removeChildrenAndResources(Session session) Remove all dependent objects and free all resources (files, blocks in files) of this object.
void	setBefore(boolean before)
void	setInsteadOf(boolean insteadOf)
void	setNoWait(boolean noWait)
void	setOnRollback(boolean onRollback)
void	setQueueSize(int size)
void	setRowBased(boolean rowBased)
void	setTriggerClassName(java.lang.String triggerClassName, boolean force) Set the trigger class name and load the class if possible.
void	setTriggerSource(java.lang.String source, boolean force) Set the trigger source code and compile it if possible.
void	setTypeMask(int typeMask) Set the trigger type.

Methods inherited from class org.h2.schema.SchemaObjectBase

getSchema, getSQL, initSchemaObjectBase, isHidden

Methods inherited from class org.h2.engine.DbObjectBase

getChildren, getComment, getDatabase, getId, getModificationId, getName, initDbObjectBase, invalidate, isTemporary, isValid, rename, setComment, setModified, setObjectName, setTemporary, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.engine.DbObject

getChildren, getComment, getDatabase, getId, getName, isTemporary, rename, setComment, setTemporary

Field Detail

DEFAULT_QUEUE_SIZE

public static final int DEFAULT_QUEUE_SIZE

The default queue size.

See Also:

Constant Field Values

Constructor Detail

TriggerObject

public TriggerObject(Schema schema,
             int id,
             java.lang.String name,
             Table table)

Method Detail

setBefore

public void setBefore(boolean before)

setInsteadOf

public void setInsteadOf(boolean insteadOf)

setTriggerClassName

public void setTriggerClassName(java.lang.String triggerClassName,
                       boolean force)

Set the trigger class name and load the class if possible.

Parameters:

triggerClassName - the name of the trigger class

force - whether exceptions (due to missing class or access rights) should be ignored

setTriggerSource

public void setTriggerSource(java.lang.String source,
                    boolean force)

Set the trigger source code and compile it if possible.

Parameters:

source - the source code of a method returning a Trigger

force - whether exceptions (due to syntax error) should be ignored

fire

public void fire(Session session,
        int type,
        boolean beforeAction)

Call the trigger class if required. This method does nothing if the trigger is not defined for the given action. This method is called before or after any rows have been processed, once for each statement.

Parameters:

session - the session

type - the trigger type

beforeAction - if this method is called before applying the changes

fireRow

public boolean fireRow(Session session,
              Table table,
              Row oldRow,
              Row newRow,
              boolean beforeAction,
              boolean rollback)

Call the fire method of the user-defined trigger class if required. This method does nothing if the trigger is not defined for the given action. This method is called before or after a row is processed, possibly many times for each statement.

Parameters:

session - the session

table - the table

oldRow - the old row

newRow - the new row

beforeAction - true if this method is called before the operation is applied

rollback - when the operation occurred within a rollback

Returns:

true if no further action is required (for 'instead of' triggers)

setTypeMask

public void setTypeMask(int typeMask)

Set the trigger type.

Parameters:

typeMask - the type

setRowBased

public void setRowBased(boolean rowBased)

setQueueSize

public void setQueueSize(int size)

getQueueSize

public int getQueueSize()

setNoWait

public void setNoWait(boolean noWait)

isNoWait

public boolean isNoWait()

setOnRollback

public void setOnRollback(boolean onRollback)

getDropSQL

public java.lang.String getDropSQL()

Description copied from class: DbObjectBase

Build a SQL statement to drop this object.

Specified by:

getDropSQL in interface DbObject

Specified by:

getDropSQL in class DbObjectBase

Returns:

the SQL statement

getCreateSQLForCopy

public java.lang.String getCreateSQLForCopy(Table targetTable,
                                   java.lang.String quotedName)

Description copied from interface: DbObject

Build a SQL statement to re-create the object, or to create a copy of the object with a different name or referencing a different table

Parameters:

targetTable - the new table

quotedName - the quoted name

Returns:

the SQL statement

getTypeNameList

public java.lang.String getTypeNameList()

getCreateSQL

public java.lang.String getCreateSQL()

Description copied from class: DbObjectBase

Build a SQL statement to re-create this object.

Specified by:

getCreateSQL in interface DbObject

Specified by:

getCreateSQL in class DbObjectBase

Returns:

the SQL statement

getType

public int getType()

Description copied from interface: DbObject

Get the object type.

Returns:

the object type

removeChildrenAndResources

public void removeChildrenAndResources(Session session)

Description copied from class: DbObjectBase

Remove all dependent objects and free all resources (files, blocks in files) of this object.

Specified by:

removeChildrenAndResources in interface DbObject

Specified by:

removeChildrenAndResources in class DbObjectBase

Parameters:

session - the session

checkRename

public void checkRename()

Description copied from class: DbObjectBase

Check if this object can be renamed. System objects may not be renamed.

Specified by:

checkRename in interface DbObject

Specified by:

checkRename in class DbObjectBase

getTable

public Table getTable()

Get the table of this trigger.

Returns:

the table

isBefore

public boolean isBefore()

Check if this is a before trigger.

Returns:

true if it is

getTriggerClassName

public java.lang.String getTriggerClassName()

Get the trigger class name.

Returns:

the class name

getTriggerSource

public java.lang.String getTriggerSource()

close

public void close()
           throws java.sql.SQLException

Close the trigger.

Throws:

java.sql.SQLException

isSelectTrigger

public boolean isSelectTrigger()

Check whether this is a select trigger.

Returns:

true if it is