if( environment != null ) { environment.close(); environment = null; }
if (worker != null) { worker.clearDisplayText(); }
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/mail/src/main/java/org/columba/mail/folder/headercache/BerkeleyDBHeaderList.java File path: /columba-1.4-src/core/src/main/java/org/columba/core/command/StatusObservableImpl.java
Method name: void closeEnvironment() Method name: void clearMessage()
Number of AST nodes: 3 Number of AST nodes: 2
1
if( environment != null ) {
1
if (worker != null) {
2
				environment.close();
2
	
3
				environment = null;
4
		
3
    worker.clearDisplayText();
5
	}
4
	}
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 comparisons6
  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 fragment1
    Time elapsed for statement mapping (ms)0.6
    Clone typeType 3
    Mapped Statements
    ID Statement ID Statement
    4
    if (environment != null)
    4
    if (environment != null)
    1
    if (worker != null)
    Differences
    Expression1Expression2Difference
    environmentworkerVARIABLE_NAME_MISMATCH
    com.sleepycat.je.Environmentorg.columba.api.command.IWorkerStatusControllerVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type com.sleepycat.je.Environment of variable environment does not match with type org.columba.api.command.IWorkerStatusController of variable worker
    • Make classes com.sleepycat.je.Environment and org.columba.api.command.IWorkerStatusController extend a common superclass
    1
    if (worker != null)
                                                              
    2
    worker.clearDisplayText();
    Preondition Violations
    Unmatched statement worker.clearDisplayText(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    2
    worker.clearDisplayText();
    5
    environment.close();
    5
    environment.close();
    Preondition Violations
    Unmatched statement environment.close(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    Unmatched statement environment.close(); 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
                                                  
    6
    environment = null;
    6
    environment = null;
    Preondition Violations
    Unmatched statement environment=null; cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
                                            
    Precondition Violations (6)
    Row Violation
    1Type com.sleepycat.je.Environment of variable environment does not match with type org.columba.api.command.IWorkerStatusController of variable worker
    2Unmatched statement worker.clearDisplayText(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    3Unmatched statement environment.close(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    4Unmatched statement environment.close(); 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
    5Unmatched statement environment=null; cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    6The refactoring of the clones is infeasible, because the number of macthed statements is equal to zero