oracle.adf.model.binding
Class DCDataControlReference

java.lang.Object
java.util.AbstractMap
oracle.jbo.common.JboAbstractMap
oracle.adf.model.binding.DCDataControlReference

All Implemented Interfaces:

java.lang.Cloneable, DCDataControlManagement, java.util.Map

public class DCDataControlReference

extends JboAbstractMap

implements java.lang.Cloneable, DCDataControlManagement

Nested Class Summary

Nested classes inherited from class java.util.Map

java.util.Map.Entry

Constructor Summary

DCDataControlReference(DCDataControlDef def)

Method Summary

void	beginRequest(java.util.HashMap requestCtx) Invoked in some contexts to signal the beginning of a model request.
java.lang.Object	clone()
void	endRequest(java.util.HashMap requestCtx) Invoked in some contexts to signal the end of a model request.
DCDataControl	getDataControl(BindingContext ctx)
java.lang.String	getName()
void	release()
void	release(int flags) Based on the value of the flags parameter, releases all references to the objects in the data provider layer (BC4J or other data-provider objects).
boolean	resetState() Resets the DataControl.
void	setUserParams(java.util.Map userParams)

Methods inherited from class oracle.jbo.common.JboAbstractMap

entrySet, equals, get, hashCode, internalGet

Methods inherited from class java.util.AbstractMap

clear, containsKey, containsValue, isEmpty, keySet, put, putAll, remove, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DCDataControlReference

public DCDataControlReference(DCDataControlDef def)

Method Detail

setUserParams

public void setUserParams(java.util.Map userParams)

getDataControl

public DCDataControl getDataControl(BindingContext ctx)

getName

public java.lang.String getName()

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Throws:

java.lang.CloneNotSupportedException

beginRequest

public void beginRequest(java.util.HashMap requestCtx)

Description copied from interface: DCDataControlManagement

Invoked in some contexts to signal the beginning of a model request. For example, if the DataControl is referenced in a web application then this method will be invoked by the ADF framework before control is forwarded to the first Servlet defined by the request.

Subclassing datacontrols may extend this method to perform request level initialization of the DataControl.

This method is guaranteed to be called only once per browser request. Page forwards should not result in multiple invocations.

Specified by:

beginRequest in interface DCDataControlManagement

Parameters:

requestCtx - a HashMap representing request context. Web applications which require request context may use the BindingContext.HTTP_REQUEST and BindingContext.HTTP_RESPONSE keys to acquire a reference from from the BindingContext.

endRequest

public void endRequest(java.util.HashMap requestCtx)

Description copied from interface: DCDataControlManagement

Invoked in some contexts to signal the end of a model request. For example, if the DataControl is referenced in a web application then this method will be invoked by the ADF framework after control is returned from the last Servlet defined by the request page flow.

Subclassing datacontrols may extend this method to perform request level cleanup of the DataControl.

This method is guaranteed to be called only once per browser request. Page forwards should not result in multiple invocations.

Specified by:

endRequest in interface DCDataControlManagement

Parameters:

requestCtx - a HashMap representing request context. Web applications which require request context may use the BindingContext.HTTP_REQUEST and BindingContext.HTTP_RESPONSE keys to acquire a reference from from the BindingContext.

release

public void release(int flags)

Description copied from interface: DCDataControlManagement

Based on the value of the flags parameter, releases all references to the objects in the data provider layer (BC4J or other data-provider objects). Valid values for flags are:

• REL_ALL_REFS - if this data control should release all references to both the view and model objects.
• REL_DATA_REFS - if this data control should release all references to data provider objects. The likely usage would be when say an Application Module is to be checked into a pool and this data-control may be given that or another checked out AM to work with subsequently.
• REL_VIEW_REFS - if this data control should release all references to the UI/View layer objects.

Specified by:

release in interface DCDataControlManagement

release

public void release()

Specified by:

release in interface DCDataControlManagement

resetState

public boolean resetState()

Description copied from interface: DCDataControlManagement

Resets the DataControl. DataControl providers should extend this method to reset any model session state that may have been managed by this DataControl. For example:

The ADF/BC DataControl has extended resetState to release the DataControl ApplicationModule to the ApplicationPool in unmanaged release mode.

An EJB DataControl provider may extend resetState to close the DataControl EJB SessionBean

A Toplink DataControl provider may extend resetState to close the DataControl UnitOfWork or ClientSession.

Please note that resetState may not occur immediately. If beginRequest has been invoked on the DataControl then resetState processing will be deferred until endRequest processing.

Extending DataControl providers should invoke release(REL_DATA_REFS) after performing and DataControl specific resetState handling.

Specified by:

resetState in interface DCDataControlManagement

Returns:

true if resetState was processed immediately. false if resetState was deferred to endRequest processing.