if (dataStorage == null) { dataStorage = new XmlDataStorage(this); } return dataStorage;
if( dataStorage == null ) { dataStorage = new ZippedMHDataStorage(this.getDirectoryFile()); } return dataStorage;
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/contact/src/main/java/org/columba/addressbook/folder/AddressbookFolder.java File path: /columba-1.4-src/plugins/org.columba.mail.ZippedMHFolder/src/org/columba/mail/folder/zippedmh/ZippedMHFolder.java
Method name: DataStorage getDataStorageInstance() Method name: IDataStorage getDataStorageInstance()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (dataStorage == null) {
1
if( dataStorage == null ) {
2
            dataStorage = new XmlDataStorage(this);
2
			dataStorage = new ZippedMHDataStorage(this
3
        }
4
        
3
.getDirectoryFile());
4
		}
5
return dataStorage;
5
		return dataStorage;
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 having the same super class
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)6.7
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (dataStorage == null)
    1
    if (dataStorage == null)
    1
    if (dataStorage == null)
    Differences
    Expression1Expression2Difference
    org.columba.addressbook.folder.DataStorageorg.columba.mail.folder.zippedmh.ZippedMHDataStorageVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type org.columba.addressbook.folder.DataStorage of variable dataStorage does not match with type org.columba.mail.folder.zippedmh.ZippedMHDataStorage of variable dataStorage
    • Make classes org.columba.addressbook.folder.DataStorage and org.columba.mail.folder.zippedmh.ZippedMHDataStorage extend a common superclass
    1
    if (dataStorage == null)
                                                                                                                                    
    2
    dataStorage = new ZippedMHDataStorage(this.getDirectoryFile());
    Preondition Violations
    Unmatched statement dataStorage=new ZippedMHDataStorage(this.getDirectoryFile()); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    2
    dataStorage = new ZippedMHDataStorage(this.getDirectoryFile());
    2
    dataStorage = new XmlDataStorage(this);
    2
    dataStorage = new XmlDataStorage(this);
    Preondition Violations
    Unmatched statement dataStorage=new XmlDataStorage(this); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
                                                                                    
                                                
    3
    return dataStorage;
    Preondition Violations
    Unmatched return dataStorage;
    3
    return dataStorage;
    3
    return dataStorage;
    3
    return dataStorage;
    Preondition Violations
    Unmatched return dataStorage;
                                                
    Precondition Violations (6)
    Row Violation
    1Type org.columba.addressbook.folder.DataStorage of variable dataStorage does not match with type org.columba.mail.folder.zippedmh.ZippedMHDataStorage of variable dataStorage
    2Unmatched statement dataStorage=new ZippedMHDataStorage(this.getDirectoryFile()); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    3Unmatched statement dataStorage=new XmlDataStorage(this); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    4Unmatched return dataStorage;
    5Unmatched return dataStorage;
    6The refactoring of the clones is infeasible, because the number of macthed statements is equal to zero