org.hsqldb
Interface Trigger

All Known Implementing Classes:

TriggerSample

public interface Trigger

The interface an HSQLDB TRIGGER must implement. The user-supplied class that implements this must have a default constructor.

Since:

1.7.0

Author:

Peter Hudson

Field Summary

static int	DELETE_AFTER
static int	DELETE_AFTER_ROW
static int	DELETE_BEFORE
static int	DELETE_BEFORE_ROW
static int	INSERT_AFTER
static int	INSERT_AFTER_ROW
static int	INSERT_BEFORE
static int	INSERT_BEFORE_ROW
static int	UPDATE_AFTER
static int	UPDATE_AFTER_ROW
static int	UPDATE_BEFORE
static int	UPDATE_BEFORE_ROW

Method Summary

void	fire(int type, java.lang.String trigName, java.lang.String tabName, java.lang.Object[] oldRow, java.lang.Object[] newRow) The method invoked upon each triggered action.

Field Detail

INSERT_AFTER

public static final int INSERT_AFTER

See Also:

Constant Field Values

DELETE_AFTER

public static final int DELETE_AFTER

See Also:

Constant Field Values

UPDATE_AFTER

public static final int UPDATE_AFTER

See Also:

Constant Field Values

INSERT_BEFORE

public static final int INSERT_BEFORE

See Also:

Constant Field Values

DELETE_BEFORE

public static final int DELETE_BEFORE

See Also:

Constant Field Values

UPDATE_BEFORE

public static final int UPDATE_BEFORE

See Also:

Constant Field Values

INSERT_AFTER_ROW

public static final int INSERT_AFTER_ROW

See Also:

Constant Field Values

DELETE_AFTER_ROW

public static final int DELETE_AFTER_ROW

See Also:

Constant Field Values

UPDATE_AFTER_ROW

public static final int UPDATE_AFTER_ROW

See Also:

Constant Field Values

INSERT_BEFORE_ROW

public static final int INSERT_BEFORE_ROW

See Also:

Constant Field Values

DELETE_BEFORE_ROW

public static final int DELETE_BEFORE_ROW

See Also:

Constant Field Values

UPDATE_BEFORE_ROW

public static final int UPDATE_BEFORE_ROW

See Also:

Constant Field Values

Method Detail

fire

public void fire(int type,
                 java.lang.String trigName,
                 java.lang.String tabName,
                 java.lang.Object[] oldRow,
                 java.lang.Object[] newRow)

The method invoked upon each triggered action.

When UPDATE triggers are fired, oldRow contains the existing values of the table row and newRow contains the new values.

For INSERT triggers, oldRow is null and newRow contains the table row to be inserted. For DELETE triggers, newRow is null and oldRow contains the table row to be deleted. type contains the integer index id for trigger type, e.g. TriggerDef.INSERT_AFTER (fredt@users)

Parameters:

trigName - the name of the trigger

tabName - the name of the table upon which the triggered action is occuring

oldRow - the old row

newRow - the new row