if (charset == null) { charset = Charset.forName(System.getProperty("file.encoding")); } return charset;
if (instance == null) { instance = new HeaderItemDNDManager(); } return instance;
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/mail/src/main/java/org/columba/mail/gui/composer/ComposerModel.java File path: /columba-1.4-src/contact/src/main/java/org/columba/addressbook/gui/list/HeaderItemDNDManager.java
Method name: Charset getCharset() Method name: HeaderItemDNDManager getInstance()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (charset == null) {
1
if (instance == null) {
2
			charset = Charset.forName(System.getProperty("file.encoding"));
3
		}
4
		return charset
2
            instance = new HeaderItemDNDManager();
3
        }
5
;
4
        return instance;
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)0.6
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (charset == null)
    1
    if (charset == null)
    1
    if (instance == null)
    Differences
    Expression1Expression2Difference
    charsetinstanceVARIABLE_NAME_MISMATCH
    java.nio.charset.Charsetorg.columba.addressbook.gui.list.HeaderItemDNDManagerVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type java.nio.charset.Charset of variable charset does not match with type org.columba.addressbook.gui.list.HeaderItemDNDManager of variable instance
    • Make classes java.nio.charset.Charset and org.columba.addressbook.gui.list.HeaderItemDNDManager extend a common superclass
    1
    if (instance == null)
                                                                                  
    2
    instance = new HeaderItemDNDManager();
    Preondition Violations
    Unmatched statement instance=new HeaderItemDNDManager(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    2
    instance = new HeaderItemDNDManager();
    2
    charset = Charset.forName(System.getProperty("file.encoding"));
    2
    charset = Charset.forName(System.getProperty("file.encoding"));
    Preondition Violations
    Unmatched statement charset=Charset.forName(System.getProperty("file.encoding")); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
                                                                                                                                    
                                          
    3
    return instance;
    Preondition Violations
    Unmatched return instance;
    3
    return instance;
    3
    return charset;
    3
    return charset;
    Preondition Violations
    Unmatched return charset;
                                        
    Precondition Violations (6)
    Row Violation
    1Type java.nio.charset.Charset of variable charset does not match with type org.columba.addressbook.gui.list.HeaderItemDNDManager of variable instance
    2Unmatched statement instance=new HeaderItemDNDManager(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    3Unmatched statement charset=Charset.forName(System.getProperty("file.encoding")); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    4Unmatched return instance;
    5Unmatched return charset;
    6The refactoring of the clones is infeasible, because the number of macthed statements is equal to zero