oracle.dacf.control
Class DataItemAccessHelper

java.lang.Object
  oracle.dacf.util.InfoBusMemberHelper
      oracle.dacf.control.ConsumerSupport
          oracle.dacf.control.DataItemAccessHelper

All Implemented Interfaces:

oracle.dacf.rp.Consumer, java.util.EventListener, javax.infobus.InfoBusDataConsumer, javax.infobus.InfoBusEventListener, javax.infobus.InfoBusMember, oracle.dacf.rp.Participant, java.beans.PropertyChangeListener

Direct Known Subclasses:

FindItemModelImpl, IBReturnItemHelper, ReturnItemNameListener

public class DataItemAccessHelper

extends ConsumerSupport

implements javax.infobus.InfoBusDataConsumer

This class provides support to help access a data item.

Version:

INTERNAL

Field Summary

Fields inherited from class oracle.dacf.util.InfoBusMemberHelper

m_infoBus, m_propListeners, m_sourceRef, m_syncLock, m_vetoListeners

Constructor Summary

DataItemAccessHelper()
Constructor

Method Summary

protected void	_setDataItem(java.lang.Object dataItem) Binds to a data item.
void	dataItemAvailable(javax.infobus.InfoBusItemAvailableEvent event) This method is called by the InfoBus class on behalf of a data producer that is announcing the availability of a new data item by name.
protected void	dataItemPublished() This method gets called wheneve the data item is published.
void	dataItemRevoked(javax.infobus.InfoBusItemRevokedEvent event) This method is called by the InfoBus class on behalf of a data producer that is revoking the availability of a previously announced data item.
java.lang.Object	getDataItem() return the data item the object is currently bound to.
java.lang.String	getDataItemName()
java.lang.String	getInfoBusName()
void	propertyChange(java.beans.PropertyChangeEvent event) This method gets called when the object's InfoBus property is changed.
void	setDataItemName(java.lang.String dataItemName) Sets the name of the InfoBus DataItem this object is bound to.
void	setInfoBusName(java.lang.String infoBusName) Sets the name of the InfoBus this transaction monitor is connected to.

Methods inherited from class oracle.dacf.control.ConsumerSupport

available, revoked

Methods inherited from class oracle.dacf.util.InfoBusMemberHelper

addInfoBusPropertyListener, addInfoBusVetoableListener, clearRef, getInfoBus, joinInfoBus, joinInfoBus, leaveInfoBus, removeInfoBusPropertyListener, removeInfoBusVetoableListener, setInfoBus

Methods inherited from class java.lang.Object

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

Constructor Detail

DataItemAccessHelper

public DataItemAccessHelper()

Constructor

Method Detail

dataItemAvailable

public void dataItemAvailable(javax.infobus.InfoBusItemAvailableEvent event)

This method is called by the InfoBus class on behalf of a data producer that is announcing the availability of a new data item by name.

Specified by:

dataItemAvailable in interface javax.infobus.InfoBusDataConsumer

dataItemRevoked

public void dataItemRevoked(javax.infobus.InfoBusItemRevokedEvent event)

This method is called by the InfoBus class on behalf of a data producer that is revoking the availability of a previously announced data item.

Specified by:

dataItemRevoked in interface javax.infobus.InfoBusDataConsumer

Parameters:

event - The event.

propertyChange

public void propertyChange(java.beans.PropertyChangeEvent event)

This method gets called when the object's InfoBus property is changed.

The object is removed as a data consumer from its previous InfoBus, and is added as a consumer to its new InfoBus.

Specified by:

propertyChange in interface java.beans.PropertyChangeListener

Parameters:

event - The event.

setInfoBusName

public void setInfoBusName(java.lang.String infoBusName)

Sets the name of the InfoBus this transaction monitor is connected to.

By default, the it is connected to the default InfoBus, named Control.DEFAULT_INFOBUS_NAME.

If the named InfoBus does not exist, it is created automatically.

Parameters:

infoBusName - The name of the InfoBus to connect to.

getInfoBusName

public java.lang.String getInfoBusName()

dataItemPublished

protected void dataItemPublished()

This method gets called wheneve the data item is published. Derived class can override this method to initialize. For ex., when the data item is published you can look at its SQL type (for ImmediateAccess/AttributeInfo's)

See Also:

dataItemAvailable(), FindItemModelImpl

_setDataItem

protected void _setDataItem(java.lang.Object dataItem)

Binds to a data item.

Specified by:

_setDataItem in class ConsumerSupport

Parameters:

dataItem - The new data item to bind to.

setDataItemName

public void setDataItemName(java.lang.String dataItemName)

Sets the name of the InfoBus DataItem this object is bound to.

The DataItem with the given name is searched for on the InfoBus, and if found, is bound to this object.

If the object is already bound to a DataItem, it is unbound first.

Parameters:

dataItemName - The name of the DataItem to bind to.

See Also:

getDataItem()

getDataItemName

public java.lang.String getDataItemName()

getDataItem

public java.lang.Object getDataItem()

return the data item the object is currently bound to.

Specified by:

getDataItem in class ConsumerSupport

Returns:

the data item which the object is currently bound to.