173-52-104

if (projectDescriptors == null) { loadFromExtensionPoints(); } return projectDescriptors;
if (fileExtensions == null) { fileExtensions = new ArrayList<String>(); } return fileExtensions;

Clone fragments detected by clone detection tool
File path: /emf-2.4.1/src/org/eclipse/emf/common/ui/wizard/ExampleInstallerWizard.java |  | File path: /emf-2.4.1/src/org/eclipse/emf/importer/ModelImporter.java
Method name: `List getProjectDescriptors()` |  | Method name: `List getFileExtensions()`
Number of AST nodes: 3 |  | Number of AST nodes: 3

1

    if (projectDescriptors == null)↵

1

    if (fileExtensions == null)↵

2

        {↵

2

        {↵

3

          loadFromExtensionPoints();↵

3

          fileExtensions = new ArrayList<String>();↵

4

        }↵

4

        }↵

5

        return projectDescriptors;

5

        return fileExtensions;

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 | 5

1. {Non-refactorable}

   Mapping Summary
   Number of mapped statements | 1
   Number of unmapped statements in the first code fragment | 2
   Number of unmapped statements in the second code fragment | 2
   Time elapsed for statement mapping (ms) | 0.7
   Clone type | Type 2

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

   1

       if (projectDescriptors == null)

   1 | if (projectDescriptors == null)
   1 | if (fileExtensions == null)

   Differences
   Expression1 | Expression2 | Difference
   --- | --- | ---
   projectDescriptors | fileExtensions | VARIABLE_NAME_MISMATCH
   java.util.List | java.util.List | VARIABLE_TYPE_MISMATCH

   Preondition Violations

   Type java.util.List<org.eclipse.emf.common.ui.wizard.AbstractExampleInstallerWizard.ProjectDescriptor> of variable projectDescriptors does not match with type java.util.List<java.lang.String> of variable fileExtensions
   - Make classes java.util.List and java.util.List extend a common superclass

   1

       if (fileExtensions == null)

   2 | fileExtensions = new ArrayList<String>();

   Preondition Violations
   Unmatched statement fileExtensions=new ArrayList<String>(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted

   2

       fileExtensions = new ArrayList<String>();

   2

       loadFromExtensionPoints();

   2 | loadFromExtensionPoints();

   Preondition Violations
   Unmatched statement loadFromExtensionPoints(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
   Unmatched statement loadFromExtensionPoints(); cannot be moved before or after the extracted code, because it throws exception(s) that should be caught by a try block that will be extracted

   3 | return fileExtensions;

   Preondition Violations
   Unmatched return fileExtensions;

   3

       return fileExtensions;

   3

       return projectDescriptors;

   3 | return projectDescriptors;

   Preondition Violations
   Unmatched return projectDescriptors;

   Precondition Violations (7)
   Row | Violation
   --- | ---
   1 | Type java.util.List<org.eclipse.emf.common.ui.wizard.AbstractExampleInstallerWizard.ProjectDescriptor> of variable projectDescriptors does not match with type java.util.List<java.lang.String> of variable fileExtensions
   2 | Unmatched statement fileExtensions=new ArrayList<String>(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
   3 | Unmatched statement loadFromExtensionPoints(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
   4 | Unmatched statement loadFromExtensionPoints(); cannot be moved before or after the extracted code, because it throws exception(s) that should be caught by a try block that will be extracted
   5 | Unmatched return fileExtensions;
   6 | Unmatched return projectDescriptors;
   7 | The refactoring of the clones is infeasible, because the number of macthed statements is equal to zero