org.dmd.dmc

Interface DmcListenerManagerIF

public interface DmcListenerManagerIF

The DmcListenerManagerIF interface defines an entity that can manage a set of attribute change listeners and notify them of changes to an object.

Method Summary

Modifier and Type	Method and Description
void	addAttributeChangeListener(DmcAttributeChangeListenerIF listener) Adds an attribute change listener.
void	removeAttributeChangeListener(DmcAttributeChangeListenerIF listener) Removes an attribute change listener.
void	updateObjectAdd(DmcContainerIF container, String an, Object existing, Object newvalue) This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be added an object.
void	updateObjectDel(DmcContainerIF container, String an, Object existing, Object value) This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be added an object.
void	updateObjectRem(DmcContainerIF container, String an, Object existing) This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be added an object.
void	updateObjectSet(DmcContainerIF container, String an, Object existing, Object newvalue) This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be set on an object.

Method Detail

addAttributeChangeListener

void addAttributeChangeListener(DmcAttributeChangeListenerIF listener)

Adds an attribute change listener.

Parameters:

listener -

removeAttributeChangeListener

void removeAttributeChangeListener(DmcAttributeChangeListenerIF listener)

Removes an attribute change listener.

Parameters:

listener -

updateObjectSet

void updateObjectSet(DmcContainerIF container,
                     String an,
                     Object existing,
                     Object newvalue)

This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be set on an object. By funneling all set requests through this method, we can handle things like attribute change notifications through a common mechanism.

Parameters:

container - The container being modified.

an - The name of the attribute affected.

existing - The existing value, or null if there wasn't one.

newvalue - The new value for the single-valued attribute.

updateObjectAdd

void updateObjectAdd(DmcContainerIF container,
                     String an,
                     Object existing,
                     Object newvalue)

This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be added an object. By funnelling all set requests through this method, we can handle things like attribute change notifications through a common mechanism.

Parameters:

container - The container being modified.

an - The name of the attribute affected.

existing - The existing value, or null if there wasn't one.

newvalue - The new value being added.

updateObjectDel

void updateObjectDel(DmcContainerIF container,
                     String an,
                     Object existing,
                     Object value)

This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be added an object. By funneling all set requests through this method, we can handle things like attribute change notifications through a common mechanism.

Parameters:

container - The container being modified.

an - The name of the attribute affected.

existing - The existing value, or null if there wasn't one.

value - The value being deleted from the multi-valued attribute.

updateObjectRem

void updateObjectRem(DmcContainerIF container,
                     String an,
                     Object existing)

This method is called by DmcContainer classes once they have instantiated the appropriate value holder for an attribute value to be added an object. By funneling all set requests through this method, we can handle things like attribute change notifications through a common mechanism.

Parameters:

container - The container being modified.

an - The name of the attribute being removed from the object.

existing - The existing value, or null if there wasn't one.