if (instance == null) { instance = new HelpManager(); } return instance;
if (instance == null) { throw new RuntimeException("Must call Constructor first!"); } return instance;
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/core/src/main/java/org/columba/core/help/HelpManager.java File path: /columba-1.4-src/core/src/main/java/org/columba/core/config/Config.java
Method name: HelpManager getInstance() Method name: Config getInstance()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (instance == null) {
1
if (instance == null) {
2
			instance = new HelpManager();
2
			throw new RuntimeException("Must call Constructor first!");
3
		}
3
		}
4
		return instance;
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)0.2
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (instance == null)
    1
    if (instance == null)
    1
    if (instance == null)
    Differences
    Expression1Expression2Difference
    org.columba.core.help.HelpManagerorg.columba.core.config.ConfigVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type org.columba.core.help.HelpManager of variable instance does not match with type org.columba.core.config.Config of variable instance
    • Make classes org.columba.core.help.HelpManager and org.columba.core.config.Config extend a common superclass
    1
    if (instance == null)
                                                                                                                                
    2
    throw new RuntimeException("Must call Constructor first!");
    Preondition Violations
    Unmatched throw new RuntimeException("Must call Constructor first!");
    2
    throw new RuntimeException("Must call Constructor first!");
    2
    instance = new HelpManager();
                                                                
                                          
    3
    return instance;
    Preondition Violations
    Unmatched return instance;
    3
    return instance;
    3
    return instance;
    3
    return instance;
    Preondition Violations
    Unmatched return instance;
                                          
    Precondition Violations (4)
    Row Violation
    1Type org.columba.core.help.HelpManager of variable instance does not match with type org.columba.core.config.Config of variable instance
    2Unmatched throw new RuntimeException("Must call Constructor first!");
    3Unmatched return instance;
    4Unmatched return instance;