Extract Superclass Refactoring Specification
$Id: extractsuperclass.html,v 1.7 2007/06/25 14:03:40 jpokorsky Exp $ (see
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This refactoring feature allows to create a new class based on a
given (base) class. The new class is superclass of the base class.
Implementation of this refactoring is tracked in issue
57479.
Pre-Conditions
- A java class is selected.
Pre-Checks
No specific checks.
Parameters
- Name of the new class.
- Interfaces (that the base class implements) that should the new
class implement.
- Protected and public methods and fields (from the
base class or base interface) that should declared as abstract in the
new class.
Fast Parameters Check
No specific checks.
Parameters Check
- [4.2] Error: The entered name for the new class causes a name clash.
Changes To Be Made
- The new class with the selected methods and
fields is created in the same package as the base class. The new class
is abstract in case of extracting an abstract method or an interface from the implements clause
or in case of an abstract superclass and not selecting all implementation methods to extract.
If the base class extends a class, the new class will
extend this class (extended by the base class). Moreover, the new class
implements all interfaces selected from the base class.
- The implements and extends clauses are updated. The base calss
should extend the new class and all interfaces that were selected are
removed from the implements clause.
- The selected public and protected fields are removed from the
base class.
Checks During Changes Preparation
No specific checks.
Refactoring UI
Menu item:
Extract Superclass...
Action title:
Extract Superclass - OldClass
The panel should display a text field for name of the new class, a
table which contains of interfaces that are implemented by the base class and
public and protected methods and fields from the base
class. Elements in the table can be checked meaning they
should be included into the selection.
Make Abstract checkbox will be available only for methods.
----------------------------------------------
| Superclass Name: _NewClass_______________ |
| |
| Members to Extract: |
| ------------------------------------------ |
| | | Member |Make Abstract| |
| ------------------------------------------ |
| | o doJob | | |
| | x counter | | |
| | o InnerClass | | |
| | o implements IFoo | | |
| | o implements IBar | | |
| | | | |
| ------------------------------------------ |
----------------------------------------------
