de.must.dataobj

Class DataChangedEvent

java.lang.Object

de.must.dataobj.DataChangedEvent

public class DataChangedEvent
extends java.lang.Object

Data change event. Used for synchronization of data presentations, e.g. to update a ComboBox when a new entry was added by an administration.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DELETION_MODE
static int	INSERTION_MODE
static java.lang.String[]	modeDescription
static int	NOT_THE_LAST_OF_A_SEQUENCE_TYPE
static int	SINGLE_TYPE
static int	SUMMARY_TYPE
static int	UPDATE_MODE

Constructor Summary

Constructors

Constructor and Description
DataChangedEvent(java.lang.String entityName, int mode, int sequenceType, java.lang.Class<?> sender, Identifier identifier) Constructs a new DataChangedEvent.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getEntityName() Returns the entity name.
Identifier	getIdentifier() Returns the identifier (primary key) of the affected row if available.
int	getMode() Returns the change mode.
int	getNbr() Returns the number of the data change event.
java.lang.Class<?>	getSender() Returns the sender.
int	getSequenceType() Returns the sequence type.
java.lang.Thread	getThread() Returns the thread which created this event.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

INSERTION_MODE

public static final int INSERTION_MODE

See Also:

Constant Field Values

UPDATE_MODE

public static final int UPDATE_MODE

See Also:

Constant Field Values

DELETION_MODE

public static final int DELETION_MODE

See Also:

Constant Field Values

modeDescription

public static final java.lang.String[] modeDescription

SINGLE_TYPE

public static final int SINGLE_TYPE

See Also:

Constant Field Values

NOT_THE_LAST_OF_A_SEQUENCE_TYPE

public static final int NOT_THE_LAST_OF_A_SEQUENCE_TYPE

See Also:

Constant Field Values

SUMMARY_TYPE

public static final int SUMMARY_TYPE

See Also:

Constant Field Values

Constructor Detail

DataChangedEvent

public DataChangedEvent(java.lang.String entityName,
                        int mode,
                        int sequenceType,
                        java.lang.Class<?> sender,
                        Identifier identifier)

Constructs a new DataChangedEvent. To prevent repeated change consequences, it may be indicated that more updates on the same entity follow by using mode NOT_THE_LAST_OF_A_SEQUENCE_TYPE

Parameters:

entityName - the name of the entity that was changed

mod - the data change mode which may be INSERTION_MODE, UPDATE_MODE or DELETION_MODE

sequenceType - the sequence type which may be SINGLE_TYPE, NOT_THE_LAST_OF_A_SEQUENCE_TYPE or SUMMARY_TYPE

sender - the class who causes the change event

Method Detail

getNbr

public int getNbr()

Returns the number of the data change event. Suitable for deciding not to react multiple times on the same event, distributed due to multiple listeners on the same table.

Returns:

the number of the data change event

getEntityName

public java.lang.String getEntityName()

Returns the entity name.

Returns:

the entity name

getMode

public int getMode()

Returns the change mode.

Returns:

the change mode

See Also:

INSERTION_MODE, UPDATE_MODE, DELETION_MODE

getSequenceType

public int getSequenceType()

Returns the sequence type.

Returns:

the sequence type

getSender

public java.lang.Class<?> getSender()

Returns the sender.

Returns:

the sender

getIdentifier

public Identifier getIdentifier()

Returns the identifier (primary key) of the affected row if available.

Returns:

the identifier (primary key) of the affected row

getThread

public java.lang.Thread getThread()

Returns the thread which created this event.

Returns:

the thread which created this event

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object