if (key == null) { return NULL_KEY; } else { return key; }
if (internal == null) { return getRuntime().getNil(); } else { return internal; }
Clone fragments detected by clone detection tool
File path: /jruby-1.4.0/src/org/jruby/util/WeakIdentityHashMap.java File path: /jruby-1.4.0/src/org/jruby/RubyStringIO.java
Method name: Object maskKey(Object) Method name: IRubyObject string()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (key == null) {
1
if (internal == null) {
2
            return NULL_KEY;
2
            return getRuntime().getNil();
3
        } else {
3
        } else {
4
            return key;
4
            return internal;
5
        }
5
        }
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)0.2
Clones locationClones are in different classes
Number of node comparisons9
  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)3.4
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (key == null)
    1
    if (key == null)
    1
    if (internal == null)
    Differences
    Expression1Expression2Difference
    keyinternalVARIABLE_NAME_MISMATCH
    java.lang.Objectorg.jruby.RubyStringVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type java.lang.Object of variable key does not match with type org.jruby.RubyString of variable internal
    • Make classes java.lang.Object and org.jruby.RubyString extend a common superclass
    1
    if (internal == null)
                                                                    
    2
    return getRuntime().getNil();
    Preondition Violations
    Unmatched return getRuntime().getNil();
    2
    return getRuntime().getNil();
    2
    return NULL_KEY;
    2
    return NULL_KEY;
    Preondition Violations
    Unmatched return NULL_KEY;
                                          
    else
            
                                          
    3
    return internal;
    Preondition Violations
    Unmatched return internal;
    3
    return internal;
    3
    return key;
    3
    return key;
    Preondition Violations
    Unmatched return key;
                                
    Precondition Violations (5)
    Row Violation
    1Type java.lang.Object of variable key does not match with type org.jruby.RubyString of variable internal
    2Unmatched return getRuntime().getNil();
    3Unmatched return NULL_KEY;
    4Unmatched return internal;
    5Unmatched return key;