if (dataStorage == null) { dataStorage = new MHDataStorage(this); } return dataStorage;
if (_spellValidator == null) { _spellValidator = new Validator(); } return _spellValidator;
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/mail/src/main/java/org/columba/mail/folder/mh/CachedMHFolder.java File path: /columba-1.4-src/mail/src/main/java/org/columba/mail/spellcheck/cswilly/FileSpellChecker.java
Method name: IDataStorage getDataStorageInstance() Method name: Validator _getSpellValidator()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (dataStorage == null) {
1
if (_spellValidator == null) {
2
            dataStorage = new MHDataStorage(this);
2
            _spellValidator = new Validator();
3
        }
3
        }
4

4
        return dataStorage;
5
        return _spellValidator;
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)17.4
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (dataStorage == null)
    1
    if (dataStorage == null)
    1
    if (_spellValidator == null)
    Differences
    Expression1Expression2Difference
    dataStorage_spellValidatorVARIABLE_NAME_MISMATCH
    org.columba.mail.folder.IDataStorageorg.columba.mail.spellcheck.cswilly.ValidatorVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type org.columba.mail.folder.IDataStorage of variable dataStorage does not match with type org.columba.mail.spellcheck.cswilly.Validator of variable _spellValidator
    • Make classes org.columba.mail.folder.IDataStorage and org.columba.mail.spellcheck.cswilly.Validator extend a common superclass
    1
    if (_spellValidator == null)
                                                                          
    2
    _spellValidator = new Validator();
    Preondition Violations
    Unmatched statement _spellValidator=new Validator(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    2
    _spellValidator = new Validator();
    2
    dataStorage = new MHDataStorage(this);
    2
    dataStorage = new MHDataStorage(this);
    Preondition Violations
    Unmatched statement dataStorage=new MHDataStorage(this); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
                                                                                  
                                                        
    3
    return _spellValidator;
    Preondition Violations
    Unmatched return _spellValidator;
    3
    return _spellValidator;
    3
    return dataStorage;
    3
    return dataStorage;
    Preondition Violations
    Unmatched return dataStorage;
                                                
    Precondition Violations (6)
    Row Violation
    1Type org.columba.mail.folder.IDataStorage of variable dataStorage does not match with type org.columba.mail.spellcheck.cswilly.Validator of variable _spellValidator
    2Unmatched statement _spellValidator=new Validator(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    3Unmatched statement dataStorage=new MHDataStorage(this); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    4Unmatched return _spellValidator;
    5Unmatched return dataStorage;
    6The refactoring of the clones is infeasible, because the number of macthed statements is equal to zero