if (myInstance == null) { myInstance = new NullWorkerStatusController(); } return myInstance;
if (guiItem == null) { guiItem = new GuiItem(getRoot().getElement(OPTIONS_GUI)); } return guiItem;
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/core/src/main/java/org/columba/core/command/NullWorkerStatusController.java File path: /columba-1.4-src/core/src/main/java/org/columba/core/config/OptionsXmlConfig.java
Method name: NullWorkerStatusController getInstance() Method name: GuiItem getGuiItem()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (myInstance == null) {
1
if (guiItem == null) {
2
	    myInstance = new NullWorkerStatusController();
2
			guiItem = new GuiItem(getRoot().getElement(OPTIONS_GUI));
3
	}
3
		}
4
	return myInstance;
4
		return guiItem;
Summary
Number of common nesting structure subtrees1
Number of refactorable cases0
Number of non-refactorable cases1
Time elapsed for finding largest common nesting structure subtrees (ms)0.1
Clones locationClones are in different classes
Number of node comparisons5
  1. {Non-refactorable}
    Mapping Summary
    Number of mapped statements1
    Number of unmapped statements in the first code fragment2
    Number of unmapped statements in the second code fragment2
    Time elapsed for statement mapping (ms)0.3
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (myInstance == null)
    1
    if (myInstance == null)
    1
    if (guiItem == null)
    Differences
    Expression1Expression2Difference
    myInstanceguiItemVARIABLE_NAME_MISMATCH
    org.columba.core.command.NullWorkerStatusControllerorg.columba.core.config.GuiItemVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type org.columba.core.command.NullWorkerStatusController of variable myInstance does not match with type org.columba.core.config.GuiItem of variable guiItem
    • Make classes org.columba.core.command.NullWorkerStatusController and org.columba.core.config.GuiItem extend a common superclass
    1
    if (guiItem == null)
                                                                                                                        
    2
    guiItem = new GuiItem(getRoot().getElement(OPTIONS_GUI));
    2
    myInstance = new NullWorkerStatusController();
                                                                                                  
                                        
    3
    return guiItem;
    Preondition Violations
    Unmatched return guiItem;
    3
    return guiItem;
    3
    return myInstance;
    3
    return myInstance;
    Preondition Violations
    Unmatched return myInstance;
                                              
    Precondition Violations (3)
    Row Violation
    1Type org.columba.core.command.NullWorkerStatusController of variable myInstance does not match with type org.columba.core.config.GuiItem of variable guiItem
    2Unmatched return guiItem;
    3Unmatched return myInstance;