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Java Source Code / Java Documentation » J2EE » Expresso » com.jcorporate.expresso.kernel

Source Cross Reference Class Diagram Java Document (Java Doc)

com.jcorporate.expresso.kernel .Containable

All known Subclasses:   com.jcorporate.expresso.kernel .ContainerComponentBase,
Containable
public interface Containable extends ExpressoComponent(Code)
Containable is partially 'marker interface' much like java.lang.Serialiable. If a class implements Containable then the Expresso Runtime wraps it with a ComponentContainer interface. This way the Container implementation is fully pluggable without any of the components knowing about the implementation of their containers.
You use get/setContainerImplementation to get the container implementation that then allows you to navigate the heirarchy of components and component containers.

author:
   Michael Rimov
since:
   Expresso 5.1

Method Summary
public ComponentContainer getContainerImplementation()

public ExpressoComponent locateComponent(String componentName)

Convenience method for Container clients.
public void setContainerImplementation(ComponentContainer newContainer)
     Sets the marker to the ComponentContainer (which has a 1:1 instance mapping with Containable).

Method Detail
getContainerImplementation
public ComponentContainer getContainerImplementation()(Code)
Retrieves the actual container implementation ComponentContainer

locateComponent
public ExpressoComponent locateComponent(String componentName)(Code)

Convenience method for Container clients. Recommended Implementation:

ExpressoComponent getComponent(String componentName) {    return this.getContainerImplementation().getComponent(componentName); }

Typical usage from an ExpressoComponent.

This example gets the default Data Context for a component within the context

DataContext default = (DataContext)this.getParent().locateComponent("default");

Parameters:
  componentName - The name of the component to retrieve an ExpressoComponent or null if the specified name doesn't exist

setContainerImplementation
public void setContainerImplementation(ComponentContainer newContainer)(Code)
Sets the marker to the ComponentContainer (which has a 1:1 instance mapping with Containable). This is often called by the actual implementation of the ComponentContainer.
Parameters:
  newContainer - a ComponentCo

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