Chain of Responsibility Pattern
The
Chain of Responsibility Pattern avoids coupling the sender of a request to
its receiver by giving more than one object a chance to handle the request.
Chain the receiving objects and pass the request along the chain until an
object handles it.
Wizard
Applicability
Additional Resources

Option |
Description |
Default |
Source folder |
Enter a source folder for the new class. Either type a valid
source folder path or click Browse to select a source
folder via a dialog. |
The source folder of the element that was selected when the
wizard was started. |
Package |
Enter a package to contain the new class. Either type a
valid package name or click Browse to select a package via
a dialog. |
The package of the element that was selected when the wizard
has been started. |
Handler class |
Type or click Browse to
select an abstract handler class. |
<AbstractHandler> |
Modifiers |
Select one or more access modifiers for the new class.
- public (uncheck for default visibility)
- abstract
|
public |
Superclass |
Type or click Browse to
select a superclass for this class. |
<java.lang.Object> |
Interfaces |
Click Add to choose
interfaces that the new class implements. |
<blank> |
Successor field |
Type or select the name of the field that will contain the
next object in the chain |
<successor> |
Can handle method |
Type or select the name of the method that will
answer whether the class can handle the request |
<canHandle> |
Handle request method |
Type or select the name of the method that will
handle the request |
<handleRequest> |
Concrete handler classes |
Click Add to enter names of the
concrete handler classes that
should be created. |
<blank> |
Use the Chain of Responsibility pattern when
- more than one object may handle a request, and the handler isn't known
a priori. The handler should be ascertained automatically.
- you want to issue a request to one of several objects without
specifying the receiver explicitly.
- the set of objects that can handle a request should be specified
dynamically.
http://c2.com/cgi/wiki?ChainOfResponsibilityPattern
http://www.wikipedia.org/wiki/Chain_of_responsibility_pattern
http://www.cmcrossroads.com/bradapp/javapats.html#ChainOfResponsibility
http://www.dofactory.com/Patterns/Pattern_Chain.asp
|