173-28-179

if (childrenFeatures == null) { super.getChildrenFeatures(object); childrenFeatures.add(TreePackage.eINSTANCE.getTreeNode_Children()); } return childrenFeatures;
if (changeNotifier == null) { changeNotifier = new ChangeNotifier(); } changeNotifier.addListener(listener);

Clone fragments detected by clone detection tool
File path: /emf-2.4.1/src/org/eclipse/emf/edit/tree/provider/TreeNodeItemProvider.java |  | File path: /emf-2.4.1/src/org/eclipse/emf/edit/provider/ItemProvider.java
Method name: `Collection getChildrenFeatures(Object)` |  | Method name: `void addListener(INotifyChangedListener)`
Number of AST nodes: 4 |  | Number of AST nodes: 3

1

    if (childrenFeatures == null)↵

1

    if (changeNotifier == null)↵

2

        {↵

2

        {↵

3

          super.getChildrenFeatures(object);↵

3

          changeNotifier = new ChangeNotifier();↵

4

      ↵

4

        }↵

5

        childrenFeatures.add(TreePackage.eINSTANCE.getTreeNode_Children());↵

5

        ch↵

6

        }↵

7

        return childrenFeatures;

6

    angeNotifier.addListener(listener);

See real code fragment |  | See real code fragment

Summary
Number of common nesting structure subtrees | 1
Number of refactorable cases | 0
Number of non-refactorable cases | 1
Time elapsed for finding largest common nesting structure subtrees (ms) | 0.2
Clones location | Clones are in different classes
Number of node comparisons | 7

1. {Non-refactorable}

   Mapping Summary
   Number of mapped statements | 1
   Number of unmapped statements in the first code fragment | 3
   Number of unmapped statements in the second code fragment | 2
   Time elapsed for statement mapping (ms) | 63.0
   Clone type | Type 3

   Mapped Statements
   ID | Statement |  | ID | Statement
   --- | --- | --- | --- | ---

   1

       if (childrenFeatures == null)

   1 | if (childrenFeatures == null)
   1 | if (changeNotifier == null)

   Differences
   Expression1 | Expression2 | Difference
   --- | --- | ---
   childrenFeatures | changeNotifier | VARIABLE_NAME_MISMATCH
   java.util.List | org.eclipse.emf.edit.provider.IChangeNotifier | VARIABLE_TYPE_MISMATCH

   Preondition Violations

   Type java.util.List<org.eclipse.emf.ecore.EStructuralFeature> of variable childrenFeatures does not match with type org.eclipse.emf.edit.provider.IChangeNotifier of variable changeNotifier
   - Make classes java.util.List and org.eclipse.emf.edit.provider.IChangeNotifier extend a common superclass

   1

       if (changeNotifier == null)

   2 | changeNotifier = new ChangeNotifier();

   Preondition Violations
   Unmatched statement changeNotifier=new ChangeNotifier(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted

   2

       changeNotifier = new ChangeNotifier();

   2

       super.getChildrenFeatures(object);

   3

       childrenFeatures.add(TreePackage.eINSTANCE.getTreeNode_Children());

   3 | childrenFeatures.add(TreePackage.eINSTANCE.getTreeNode_Children());

   Preondition Violations
   Unmatched statement childrenFeatures.add(TreePackage.eINSTANCE.getTreeNode_Children()); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted

   3 | changeNotifier.addListener(listener);

   Preondition Violations
   Unmatched statement changeNotifier.addListener(listener); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted

   3

       changeNotifier.addListener(listener);

   4

       return childrenFeatures;

   4 | return childrenFeatures;

   Preondition Violations
   Unmatched return childrenFeatures;

   Precondition Violations (6)
   Row | Violation
   --- | ---
   1 | Type java.util.List<org.eclipse.emf.ecore.EStructuralFeature> of variable childrenFeatures does not match with type org.eclipse.emf.edit.provider.IChangeNotifier of variable changeNotifier
   2 | Unmatched statement changeNotifier=new ChangeNotifier(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
   3 | Unmatched statement childrenFeatures.add(TreePackage.eINSTANCE.getTreeNode_Children()); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
   4 | Unmatched statement changeNotifier.addListener(listener); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
   5 | Unmatched return childrenFeatures;
   6 | The refactoring of the clones is infeasible, because the number of macthed statements is equal to zero