if (instance == null) { instance = new StopWatch(); } return instance;
if (observable == null) { observable = ((IMAPRootFolder) getRootFolder()).getObservable(); } return observable;
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/core/src/main/java/org/columba/core/base/StopWatch.java File path: /columba-1.4-src/mail/src/main/java/org/columba/mail/folder/imap/IMAPFolder.java
Method name: StopWatch instance() Method name: IStatusObservable getObservable()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (instance == null) {
1
if (observable == null) {
2
	    instance = new StopWatch();
2
			observable = ((IMAPRootFolder) getRootFolder()).getObservable();
3
	}
3
		}
4
	return instance;
4
		return observable;
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)0.4
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (instance == null)
    1
    if (instance == null)
    1
    if (observable == null)
    Differences
    Expression1Expression2Difference
    instanceobservableVARIABLE_NAME_MISMATCH
    org.columba.core.base.StopWatchorg.columba.api.command.IStatusObservableVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type org.columba.core.base.StopWatch of variable instance does not match with type org.columba.api.command.IStatusObservable of variable observable
    • Make classes org.columba.core.base.StopWatch and org.columba.api.command.IStatusObservable extend a common superclass
    1
    if (observable == null)
                                                                                                                                    
    2
    observable = ((IMAPRootFolder)getRootFolder()).getObservable();
    2
    instance = new StopWatch();
                                                            
                                              
    3
    return observable;
    Preondition Violations
    Unmatched return observable;
    3
    return observable;
    3
    return instance;
    3
    return instance;
    Preondition Violations
    Unmatched return instance;
                                          
    Precondition Violations (3)
    Row Violation
    1Type org.columba.core.base.StopWatch of variable instance does not match with type org.columba.api.command.IStatusObservable of variable observable
    2Unmatched return observable;
    3Unmatched return instance;