if (classVariables == null) { classVariables = new Hashtable<String, IRubyObject>(4); } return classVariables;
if (threadGroup == null) { return getRuntime().getNil(); } return threadGroup;
Clone fragments detected by clone detection tool
File path: /jruby-1.4.0/src/org/jruby/RubyModule.java File path: /jruby-1.4.0/src/org/jruby/RubyThread.java
Method name: Map getClassVariables() Method name: IRubyObject group()
Number of AST nodes: 3 Number of AST nodes: 3
1
if (classVariables == null) {
1
if (threadGroup == null) {
2
            classVariables = new Hashtable<String, IRubyObject>(4);
2
        	return getRuntime().getNil();
3
        }
3
        }
4
        return classVariables
4
        
5
;
5
        return threadGroup;
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)0.5
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (classVariables == null)
    1
    if (classVariables == null)
    1
    if (threadGroup == null)
    Differences
    Expression1Expression2Difference
    classVariablesthreadGroupVARIABLE_NAME_MISMATCH
    java.util.Maporg.jruby.RubyThreadGroupVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Type java.util.Map<java.lang.String,org.jruby.runtime.builtin.IRubyObject> of variable classVariables does not match with type org.jruby.RubyThreadGroup of variable threadGroup
    • Make classes java.util.Map and org.jruby.RubyThreadGroup extend a common superclass
    1
    if (threadGroup == null)
                                                                    
    2
    return getRuntime().getNil();
    Preondition Violations
    Unmatched return getRuntime().getNil();
    2
    return getRuntime().getNil();
    2
    classVariables = new Hashtable<String, IRubyObject>(4);
                                                                                                                  
                                                
    3
    return threadGroup;
    Preondition Violations
    Unmatched return threadGroup;
    3
    return threadGroup;
    3
    return classVariables;
    3
    return classVariables;
    Preondition Violations
    Unmatched return classVariables;
                                                      
    Precondition Violations (4)
    Row Violation
    1Type java.util.Map<java.lang.String,org.jruby.runtime.builtin.IRubyObject> of variable classVariables does not match with type org.jruby.RubyThreadGroup of variable threadGroup
    2Unmatched return getRuntime().getNil();
    3Unmatched return threadGroup;
    4Unmatched return classVariables;