if (filterChains == null) { filterChains = new Vector(); } filterChains.addElement(filterChain);
if (children == null) { children = new ArrayList(); } children.add(child);
Clone fragments detected by clone detection tool
File path: /apache-ant-1.7.0/src/org/apache/tools/ant/taskdefs/Concat.java File path: /apache-ant-1.7.0/src/org/apache/tools/ant/UnknownElement.java
Method name: void addFilterChain(FilterChain) Method name: void addChild(UnknownElement)
Number of AST nodes: 3 Number of AST nodes: 3
1
if (filterChains == null) {
1
if (children == null) {
2
            filterChains = new Vector();
2
            
3
        }
4
        filterChains.addElement(filterChain
3
children = new ArrayList();
4
        }
5
);
5
        children.add(child);
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)0.4
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (filterChains == null)
    1
    if (filterChains == null)
    1
    if (children == null)
    Differences
    Expression1Expression2Difference
    filterChainschildrenVARIABLE_NAME_MISMATCH
    java.util.Vectorjava.util.ListVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type java.util.Vector of variable filterChains does not match with type java.util.List of variable children
    • Make classes java.util.Vector and java.util.List extend a common superclass
    1
    if (children == null)
                                                            
    2
    children = new ArrayList();
    2
    filterChains = new Vector();
                                                              
                                                  
    3
    children.add(child);
    3
    filterChains.addElement(filterChain);
                                                                                    
    Precondition Violations (1)
    Row Violation
    1Type java.util.Vector of variable filterChains does not match with type java.util.List of variable children